Welcome to the SR20 Community Forum - The Dash.
Page 1 of 2 12 LastLast
Results 1 to 40 of 61
  1. #1
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default HOW TO: Index Your Spark Plugs

    How to: Index Your Spark Plugs





    -Overview-

    Why do this? Indexing your spark plugs can improve the burn efficiency, thus giving a little better performance and MPG increases.
    How does it work? By positioning the open gap towards the intake valves so that they can ignite the Fuel to Air ratio right as they come in.

    Please take a look at these examples. (Courtesy of www.pulstarplug.com)




    http://video.google.com/videoplay?do...27&hl=en&emb=1

    As you can see the ground electrode is blocking the fuel expansion, you want it to hit the freshly entered fuel, not the exhaust side where some exhaust gases are still left over.

    There are a few ways to improve the spark location, Side Gaping or Indexing. Even with side gaping I would still index them for a more efficient burn.


    Quote Originally Posted by CarBibles.com
    Now I know a spark is a spark, and any spark in a fuel-air environment is going to make it burn, but if the spark is facing the intake valves, then there's nothing obstructing the mixture from getting at it. In thousandths of a second, this does actually make a difference to your burn efficiency.
    You can read more about it here, in the "Keying your spark plugs" section.


    -Tools Required-

    • Ratchet
    • Spark Plug Head for the Ratchet
    • Permanent Marker
    • 14mm Indexing Washers (I used Moroso 71910 ones that I got of eBay) - This one is not necessarily required.




    -There is Two Ways of Doing This-

    1. Using what you have (easiest and quickest way) - This method is suggested for our engines.
    You can simply find the best index by trying out different plugs in every cylinder and seeing which one would give you the best index.

    2. Using special washers designed for indexing - This method didn't work any better then the first one with our engines.
    What happens with this method is, you replace the washers that came with the spark plugs with special indexing spark plugs. There are three different thicknesses of the washers, thus they adjust the index as needed by you.

    Knowing issue with this method on our engines is, if you have the spark plugs too low, the piston WILL hit it and make a pinging noise! Another issue is if you lift the spark plug too much out of the cylinder, it will not deliver as good of a spark.

    In my opinion, save your money and just go with the method number 1.



    -Getting Started-
    Method 1

    1. Take your spark plugs out and find the ground electrode and where it connects to the base of the spark plug. What you want to do is take the permanent marker and draw a line that you will be able to see from the top.
    NOTE Only use a marker. Do not use a pencil! The graphite in the pencil can conduct electricity!




    2.Try fitting the spark plug and try to get the black mark as close to 6 O'clock, if it is way off, try a different plug or a different cylinder.


    3. Reset your ECU so that it can start adjusting to the new spark plug setup. Within a week your car should feel much better. You can reset the ECU by keeping the negative terminal unplugged for about 20 minutes.



    Method 2 - Picking up right after you have marked the ground electrode on the Spark Plug.

    1. Take off the washer from the Spark Plug, you will be using washers on it anyway

    2. Take the spark plug to your car and fit it into the spark plug. Tighten the spark plug and see where the mark shows.




    3. Put a washer on the spark plug, and try fitting it and tighten it.

    Washers:





    4. You will have to keep on doing that until you have reached our goal, making the black mark face the exhaust valves.
    NOTE Sometimes you will have to just pick up a different spark plug and work with it. This is usually the case if you require to use more then one washer.




    5. Thats it, now you probably will not end up with a perfect index every single time, so if you will have to try a different washer, etc. Well the only problem is, the washers don't really stay on the plugs and will end up in the spark plug hole...



    There is a quick and easy way to fish them out though






    6. Reset your ECU so that it can start adjusting to the new spark plug setup. Within a week your car should feel much better. You can reset the ECU by keeping the negative terminal unplugged for about 20 minutes.


    Onto the Dyno numbers...
    Now unfortunately I do not have a graph for the non-gaped plugs that were just indexed, but I received 2whp by just indexing, then 5whp more by side gaping.
    Last edited by Vadim; 10-07-09 at 11:04 AM.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  2. #2
    I'm a motorist!
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Pleasanton, CA
    Posts
    4,713

    Default

    Nice write up. 2 things I'd add. You don't want to be using 5 series you want 6 on any SR20. 7 series for turbo.

    I use a little telescoping magnet to go fishing in the plug holes.

    So did you get better fuel economy or hp or anything?
    2005 Saab 9-2x Aero - 2007 Saab 9-3 Sportcombi
    "Everybody's got a plan... and then I punch them in the mouth." Mike Tyson

  3. #3
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Quote Originally Posted by Benito Malito View Post
    Nice write up. 2 things I'd add. You don't want to be using 5 series you want 6 on any SR20. 7 series for turbo.

    I use a little telescoping magnet to go fishing in the plug holes.

    So did you get better fuel economy or hp or anything?
    These are special kind of plugs, so they need to be the 5 series. As in they are not only Iridium, they are also special in a different way hehe

    Magnets will work too, but not on the copper gasket, which is the smallest one.

    I did this yesterday, so will see in couple weeks, the car felt great, esp at higher RPM's it just kept on pulling strong
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  4. #4
    Breaks things
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Tallahassee, FL
    Posts
    244

    Default

    you had me confused in the other thread with the position of the dots.. I've always used the tip of the electrode to mark the dot, not the back.. I thought you did it backwards or something..

    I've also never used those indexing washers, I've always just had some copper washers that worked perfect. I may have to pick a set up.

    BTW: I just replaced my plugs over the weekend with NGK G power plats.. I was going to go with the cheapest NGKs they had, but they didn't have the standard coppers.. My car had IR's in it which looked like a normal burn, but man.. It's picked up a bit, still getting bad gas mileage though.
    99 Acura Integra GSR clone - NBP + Black interior = sex.
    U.S. Army

  5. #5
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Haha yeah, I've seen couple ways to make the marks for indexing... I stuck to marking the ground electrode because when I was indexing the Bosch +2, it was way easier to mark the ground electrodes then to mark the open spaces

    I couldn't find any regular washers around the house, so I was like fine I'll spend $20 on something descent

    So wait the Iridium's made the car pick up pretty well?
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  6. #6
    Breaks things
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Tallahassee, FL
    Posts
    244

    Default

    Quote Originally Posted by CovertRussian View Post
    Haha yeah, I've seen couple ways to make the marks for indexing... I stuck to marking the ground electrode because when I was indexing the Bosch +2, it was way easier to mark the ground electrodes then to mark the open spaces

    I couldn't find any regular washers around the house, so I was like fine I'll spend $20 on something descent

    So wait the Iridium's made the car pick up pretty well?
    no, I used G power platinums. The old plugs were iridiums, and looked to be in good condition, but the car is noticeably smoother.
    99 Acura Integra GSR clone - NBP + Black interior = sex.
    U.S. Army

  7. #7
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Ahhh I see, I heard that Platinums were worse at conductivity then the regular ones, so I just ended up getting Iridiums
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  8. #8
    REV it up
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Vegas Baby!!!
    Posts
    455

    Default

    Indexing, I was looking into this the other day. Good stuff. Others say that indexing towads the ex is better some times. Since you want the combustion process to evacuate towards the ex the fastest way. I also see that having it towards the IN creates a cleaner/faster burn since the ground electrode is not in the way.

    OT: seems with the pulstar plug you wont need a aftermarket ign amplifier.
    ---REDemption---

    SR20DEEP Las Vegas

  9. #9
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Mooresville, NC
    Posts
    1,541

    Default

    Thats really cool, I cannot believe I have never seen this before. A great small project to do. Appreciate your time to write this up!


    Dudeman
    1991 SE-R - SR20VE - I/H/E, N1's - 203whp On Dyno Dynamics
    - Do It Old School -

  10. #10
    Erect Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Ontario, California
    Posts
    151

    Default

    and people say that domestic and import tricks arent the same.
    classic example of old school hot rod know-how.
    great write up, ive wanted to do this since i used to race volkswagens in the early 90's and never got around to it. i may try it on my sr and ka-t now too.

  11. #11
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Quote Originally Posted by daxx View Post
    Indexing, I was looking into this the other day. Good stuff. Others say that indexing towads the ex is better some times. Since you want the combustion process to evacuate towards the ex the fastest way. I also see that having it towards the IN creates a cleaner/faster burn since the ground electrode is not in the way.

    OT: seems with the pulstar plug you wont need a aftermarket ign amplifier.
    Interesting idea of having it towards the exhaust valves... that could possibly be the case too?

    I do find the Pulstar Pulse Plugs interesting... they cost a little too much though

    I did pay $16 per plug for my plugs. I bought the Iridium IX ones, with a Sonic Sound hole, that supposable helps break down the gas... More info on the plugs can be found here

    Quote Originally Posted by Dudeman258 View Post
    Thats really cool, I cannot believe I have never seen this before. A great small project to do. Appreciate your time to write this up!


    Dudeman
    The first time I've seen this was on the CarBibles.com, it got me interested so I started to researching it more and think even if it gives you a little HP, it's worth it, esp for NA

    No problem, my job is to spread the joy amongst the community

    Quote Originally Posted by Asleep View Post
    and people say that domestic and import tricks arent the same.
    classic example of old school hot rod know-how.
    great write up, ive wanted to do this since i used to race volkswagens in the early 90's and never got around to it. i may try it on my sr and ka-t now too.
    Interesting! I think we should look at any tricks and try them on our cars, I mean what do we have to loose?

    Next trick will be Side gapping, that trick has been in use since the 1950's, so will see if it's any good for our cars
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  12. #12
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Now one thing though with using indexing washers, you will be changing the distance of the spark plug, how low it is sitting inside the cylinder that is... That may or may not be a good thing hehe.

    I heard that there are the longer spark plugs, and that using them in our SR's is not a good idea, because they might get cough by the Piston...

    Right now I indexed my plugs on two sets of washers, the original ones and the Indexing ones. I will then try to get rid of the original washers and just use Indexing ones. Will see which setup our SR's like more
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  13. #13
    I'm a motorist!
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Pleasanton, CA
    Posts
    4,713

    Default

    I dunno man. Fancy plugs always end up being snake oil in SR20s. We have a heck 'uvan ignition from the factory. I pay $.99 for coppers and swap them every second oil change.

    Quote Originally Posted by daxx View Post
    Indexing, I was looking into this the other day. Good stuff. Others say that indexing towads the ex is better some times. Since you want the combustion process to evacuate towards the ex the fastest way. I also see that having it towards the IN creates a cleaner/faster burn since the ground electrode is not in the way.

    OT: seems with the pulstar plug you wont need a aftermarket ign amplifier.
    I wonder which direction you would want to index them for turbo cars. Boost can blow out a spark if you are incorrectly gapped.


    ed; Don't get me wrong Vadim. I am intrigued and interested in your efforts.
    Last edited by Benito Malito; 03-12-08 at 09:20 PM.
    2005 Saab 9-2x Aero - 2007 Saab 9-3 Sportcombi
    "Everybody's got a plan... and then I punch them in the mouth." Mike Tyson

  14. #14
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    No worries Benito Malito, you do bring a good point, boost could possibly put out the spark...

    I agree about most plugs being snake oil, not only in SR's. What shocks me is the fact that my Bosch +2 plugs, even though are very frowned upon in our community, work better then NGK's do in my car. At least gas mileage wise. I'm hoping the Iridium NGK's can beat them while being indexed though
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  15. #15
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Posts
    109

    Default

    so whats the verdict of this ? doe sit work >?

  16. #16
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Haha not sure, I have a ScanGauge II now so now I can actually test and see if it actually works
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  17. #17
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Posts
    109

    Default

    well test and see and report ...i want to see if this is actually work it ?

  18. #18
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Will do, I probably will be conducting this test with my Newly bought NGK BKR6E's.

    Thing is, I dunno if the information will change right of way, or it will take two weeks of driving for ECU to adopt to it....
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  19. #19
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Posts
    109

    Default

    any word yet ?

  20. #20
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Lol its gonna take longer then that. I cannot do it right now because I need to get my ecu to learn the current setting, so that I could then see what numbers I get etc.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  21. #21
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Posts
    109

    Default

    can't wait ,i'm anxious to find out what the outcome will be

  22. #22
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    I'll post up some numbers when I get it all the variables straight
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  23. #23
    Member
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Posts
    109

    Default

    whats the word?

  24. #24
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Right now my car is down, but I've been driving around with unindexed brand new BKR6E's. Getting the BHP reading and MPG readings. Then I will index them and get the readings etc.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  25. #25
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Car ran into some troubles, looks like I wont have any test results until I get it fixed... or a new motor goes in...
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  26. #26
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Alright did some testing with this

    Here is are my conditions:
    • 87 Octane Shell Gas
    • New NGK BKR6E Spark Plugs (Gapped by default at .032")
    • New OEM Spark Plug Wires
    • New OEM Distributor Cap and Rotor
    • '91 Intake Cam
    • 15* Timing
    • JWT Pop Charger/Stock Short Ram piping
    • SSAC Header 2.5"
    • 2.37" Catback with gutted Cat and Altima 2.5s Muffler
    • Sludge


    How things are calculated:

    Miles to the Gallon (MPG) - Miles driven divided by gallons fueled up.
    Horsepower- I got these readings by the ScanGauge BHP (Break Horse Power or Flywheel Horse Power) Gauge.

    Reading the Indexing - A mark with a Sharpie marker was put on top of the spark plug, so it would be visible from above. The mark is put where the ground electrode is located. More info about this can be found in the first post.


    Not Indexed (Randomly placed)
    MPG
    I drove for 87 miles, about 60 highway miles (constant), 26 city miles. Redlining abotu 5 times. Fueled up 3.6 Gallons.

    23.9MPG

    Horsepower
    At 78* intake air (air going into the engine), the car made 178 BHP in at Redline.



    Indexed 1 - The first indexing is by simply switching around spark plugs until they find the best position.

    Due to the thread being different on all plugs, it is almost impossible to get a perfect index.

    The Best Index that I could Make:
    1st Cylinder: ~10 O'Clock
    2nd Cylinder: ~6 O'Clock
    3rd Cylinder: ~9 O"Clock
    4th Cylinder: ~6 O'Clock

    MPG
    I drove for 97.5 miles, about 70 highway and 27 city miles. Redlining the car about 6 times. Fueled up 3.8 Gallons.

    25.6 MPG

    Horsepower
    At 78* intake air (air going into the engine), the car made 189 BHP in at Redline.



    Indexed 2 - After the next fuel up, I will index the spark plugs with the Morso Indexing Washers. In theory all of these should have a perfect 6 O'Clock Index.

    I decided not to spend time on this, it requires time to replace all of the washers. I went onto trying the MPG's with the Bosch Platinum +2 Plugs.

    Problem with our motors is that we can't have the spark plugs too low, if we do they will hit the pistons. So some washers would set the spark plug too low.

    Have the spark plug too high is not good either, because it would keep the spark plug out of the cylinder. So in my opinion it is best to be able to index the spark plugs with the washers that they have on them, but with this method it will take a couple spark plugs before they perfectly fit on perfectly.

    Conclusion
    Just by doing a little simple index, it looks like I saw about a 10 BHP increase at the same intake air temperature
    Last edited by Vadim; 08-18-08 at 11:17 PM.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  27. #27
    Sr20det B12 to be
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Kimberley ZA
    Posts
    639

    Default

    subscribed i wanna see the results to this for sure. if i can gain 10hp just by putting my plugs in different im all for it.
    1990 B12 MKII undergoing Sr20DET conversion, one day
    http://www.sr20-forum.com/showthread.php?t=342 clickey clickey

    Quote Originally Posted by 91grayDET View Post
    There are 2 types of asses in this world i like to look at, Hot chicks and Skylines.
    Whats so bad about turbo lag? It gives u a chance to wave at the guy next to u b4 u take off :)

  28. #28
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    The above posted updated with MPG's and more information
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  29. #29
    Dreaded boost junkie
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    Athens, Ohio, United States
    Posts
    811

    Default

    I indexed mine this past weekend after reading this with my new NGK plugs, it made a difference...at least in my gas mileage.

  30. #30
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Quote Originally Posted by Nathan_Barstow View Post
    I indexed mine this past weekend after reading this with my new NGK plugs, it made a difference...at least in my gas mileage.
    Since power gains are in BHP, thats nothing that you would feel, but in the long run it all adds up.

    As for MPG gains, I'm very happy that it helped
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  31. #31
    SR20 & QR25 driver
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Mar 2008
    Posts
    724

    Default

    I was thinking about this topic, I had a brand new set of BKR6E-11 and planning to replace it on my day off, could you use the washers attached to the old set of sparks?
    Yamaha Banshee bolted on
    B13 SE-R Classic T25
    B14 SE-R SR20VE bolted on
    B15 SE-R Spec V i/h/e/bsr/es mmi's/es bk/ss/ltb/coilovers SOLD..!

  32. #32
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    The original washers should technically be the same thinkness, so that wouldnt do any good.

    In my personal Opinion, it's not worth to spend $20 on those indexing washers, just try pick out the best spark plug thread per cylinder.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  33. #33
    SR20 & QR25 driver
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Mar 2008
    Posts
    724

    Default

    Quote Originally Posted by Vadim View Post
    The original washers should technically be the same thinkness, so that wouldnt do any good.

    In my personal Opinion, it's not worth to spend $20 on those indexing washers, just try pick out the best spark plug thread per cylinder.
    They're the same thickness but I meant to use some extra washers (the ones from old sparks) until fit, may be in piston #1 would be @ 9 o'clock and using 1 extra washer would be near 6 o'clock

    Is that posible?
    Yamaha Banshee bolted on
    B13 SE-R Classic T25
    B14 SE-R SR20VE bolted on
    B15 SE-R Spec V i/h/e/bsr/es mmi's/es bk/ss/ltb/coilovers SOLD..!

  34. #34
    Weekend Warrior
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    GA
    Posts
    6,370

    Default

    So you just keep putting washers on the end of the spark plug until the black mark is facing towards the front, with the mark on front side?

    What about the guys comment about using the other side as the guide?
    Bend But Don't Break
    93 SE-R Project 2Door - 2.0VE Gio tune - built 2.3VE up next.
    93 XE-R Project 4Door - DE+T - Money Pit.
    Building N/A and Boost, the best of both worlds.
    Quote Originally Posted by SR20GTi-R View Post
    NA is a thinking man's game, alot of people dont have the stomach to play NA.

  35. #35
    SR20 & QR25 driver
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Mar 2008
    Posts
    724

    Default

    Quote Originally Posted by MR-4Door-SR20DE View Post
    So you just keep putting washers on the end of the spark plug until the black mark is facing towards the front, with the mark on front side?

    What about the guys comment about using the other side as the guide?
    If you use the other side as guide you will have to index at 12 o'clock, the point is to keep the 'arc' side of the flug pointing the admision valves
    Yamaha Banshee bolted on
    B13 SE-R Classic T25
    B14 SE-R SR20VE bolted on
    B15 SE-R Spec V i/h/e/bsr/es mmi's/es bk/ss/ltb/coilovers SOLD..!

  36. #36
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Quote Originally Posted by kevo View Post
    They're the same thickness but I meant to use some extra washers (the ones from old sparks) until fit, may be in piston #1 would be @ 9 o'clock and using 1 extra washer would be near 6 o'clock

    Is that posible?
    The problem here is, the washers will lift the spark plug out of the cylinder too much. Thus keeping it out of where it needs to be

    The way to go is by having the ground electrode facing 6 o'clock. This way it would block the flame from going into the exhaust valves instead of intake valves.


    Quote Originally Posted by MR-4Door-SR20DE View Post
    So you just keep putting washers on the end of the spark plug until the black mark is facing towards the front, with the mark on front side?

    What about the guys comment about using the other side as the guide?
    This really depends on where you decide to put the black mark. If you decide to put the black mark where the ground electrode is at then, it needs to face the exhaust valves.

    If you put the mark where the spark plug gap is at, then you would need to face the intake valves.

    I personally prefer using the first method. Because its easier to determine where to face the ground electrode.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  37. #37
    Weekend Warrior
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    GA
    Posts
    6,370

    Default

    What should be the max amount of washers that you would have to put on one plug? I don't want it lifted to much.
    Bend But Don't Break
    93 SE-R Project 2Door - 2.0VE Gio tune - built 2.3VE up next.
    93 XE-R Project 4Door - DE+T - Money Pit.
    Building N/A and Boost, the best of both worlds.
    Quote Originally Posted by SR20GTi-R View Post
    NA is a thinking man's game, alot of people dont have the stomach to play NA.

  38. #38
    Vadministrator
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    VA
    Posts
    15,210

    Default

    Quote Originally Posted by MR-4Door-SR20DE View Post
    What should be the max amount of washers that you would have to put on one plug? I don't want it lifted to much.
    Depends on the size of the washers and what washers you use. If use use the indexing washers, they come in 3 different thicknesses, so that you wouldn't have to use more then one.
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    01 B15 SE /PP - SR20DET + T25 + Nismo LSD For Sale
    05 Legacy GT - 5MT + Invidia Up
    04 Forester XT - 5MT + STI Up + Invidia Downpipe
    03 Spec V - Parts car, ask if you need anything

  39. #39
    SR20 & QR25 driver
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Mar 2008
    Posts
    724

    Default

    I changed the sparks and tried indexing, after a lot of combinations I had this:

    #1 ---> 8 o'clock
    #2 ---> 6 o'clock
    #3 ---> 6 o'clock
    #4 ---> 6 o'clock

    I changed the sparks, just bought the car and was using some Denso (PK20R11), I sticked some NGK copper BKR6E-11, didn't notice any difference or change in power
    Yamaha Banshee bolted on
    B13 SE-R Classic T25
    B14 SE-R SR20VE bolted on
    B15 SE-R Spec V i/h/e/bsr/es mmi's/es bk/ss/ltb/coilovers SOLD..!

  40. #40
    Weekend Warrior
    User InfoUser ActivityThanks StatsUser Tagging StatsiTrader Feedback
    Join Date
    Dec 2007
    Location
    GA
    Posts
    6,370

    Default

    Quote Originally Posted by kevo View Post
    I changed the sparks and tried indexing, after a lot of combinations I had this:

    #1 ---> 8 o'clock
    #2 ---> 6 o'clock
    #3 ---> 6 o'clock
    #4 ---> 6 o'clock

    I changed the sparks, just bought the car and was using some Denso (PK20R11), I sticked some NGK copper BKR6E-11, didn't notice any difference or change in power

    ^Hmmmm............It might be a waste of time.
    Bend But Don't Break
    93 SE-R Project 2Door - 2.0VE Gio tune - built 2.3VE up next.
    93 XE-R Project 4Door - DE+T - Money Pit.
    Building N/A and Boost, the best of both worlds.
    Quote Originally Posted by SR20GTi-R View Post
    NA is a thinking man's game, alot of people dont have the stomach to play NA.

 

 
Page 1 of 2 12 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to top