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  1. #1
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    Default How to measure a camshaft

    Hey guys,

    I recently purchase some new cams and I want to make sure I have the right ones,

    So I had these measures:



    But I tried several ways but couldn't come to any useful measure

    Can you give me a hand?

  2. #2
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    What cams did you get? Measure the high lobes in mm with some measuring calipers and i can tell you

  3. #3
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    They are supposed to be SR16VE cams, I measured 3.6 cms on the high lobes

  4. #4
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    Do you have a Green and Orange paint stripe on the cam?
    Last edited by pTen; 08-02-12 at 12:36 AM.

  5. #5
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    Quote Originally Posted by pTen View Post
    Do you have a Green and Orange paint stripe on the cam?
    I believe they do, I'll check.

    On the measure stuff, I have come with the following,

    (Highest part of the lobe - lowest part of the lobe) x camshaft ratio

    Is this correct?? If so, what's the camshaft ratio?

  6. #6
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    So the 20v cams are the best here?
    My vvl pops harder than a virgins cherry

  7. #7
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    Quote Originally Posted by sugarwaterpurpl View Post
    So the 20v cams are the best here?
    On NA, no. N1 ones are, take a look at the duration, not just the lift.

  8. #8
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    So less duration is better? Im still learning how to exactly read and understand the cams and the measurements.
    More lift the better, less duration the better?
    More lift meaning the valves go down further?
    And duration is?
    My vvl pops harder than a virgins cherry

  9. #9
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    Quote Originally Posted by sugarwaterpurpl View Post
    So less duration is better? Im still learning how to exactly read and understand the cams and the measurements.
    More lift the better, less duration the better?
    More lift meaning the valves go down further?
    And duration is?




    - Lift is the how MUCH the valves go over the combustion chamber (measured in millimeters)

    - Duration is how LONG the valves stay open (measured in degrees, greater number means more time)

    - There is also Overlap, which means how LONG both the intake and exhaust valves are open at the same time (also measured in degrees)


    What I didn't know is that the measurements in the table I presented include the rocker arm ratio which adds up to the actual lift value.
    Last edited by Nicoxis; 08-02-12 at 12:30 PM.
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  10. #10
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    I see! Great diagram thank you! getting more of an understanding now
    My vvl pops harder than a virgins cherry

  11. #11
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    Quote Originally Posted by sugarwaterpurpl View Post
    I see! Great diagram thank you! getting more of an understanding now
    Give me a like then!

    hahaha j/k

  12. #12
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    I have all cam lobe measurements in my note book that i took myself. If you can get me an accurate measurement i can tell you exactly what you got. But the paint marks are normally the give away

  13. #13
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    Here are my measures, in centimeters


  14. #14
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    Quote Originally Posted by pTen View Post
    I have all cam lobe measurements in my note book that i took myself. If you can get me an accurate measurement i can tell you exactly what you got. But the paint marks are normally the give away
    Can you take a look at the values I got?

  15. #15
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    How are you measuring them? cause those values are way off even 2L cams

  16. #16
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    Quote Originally Posted by pTen View Post
    How are you measuring them? cause those values are way off even 2L cams
    This is how I'm measuring,

    Exhaust cam,




  17. #17
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    I have always used digital calipers. So its hard for me to gauge an exact measurement with your pictures.

    These are the OEM measurements for SR16VE cams.

    Intake: Low - 36.60mm High - 38.85mm
    Exhaust: Low - 37.20mm High - 38.95mm

    These values are +/- 0.20mm Due to cam & tool wear, tool calibration and user error

    Values I personally took of my own set of SR16VE cams with a few beers down me.

    Intake: Low - 36.60mm High - 39mm
    Exhaust: Low - 37.20mm High - 39mm
    Last edited by pTen; 08-03-12 at 03:50 PM.
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  18. #18
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    Adding to what pTen posted.

    Nico, we have all of the VE cam nose height measurements in the Forum Manifesto under the Variable Valve Lift (and duration) (VVL) and SR20VE Engine Tech section. Here is the direct link to the thread with the measurements SR20VE And SR16VE Spec With Pics. The first image is the one you want, seen here:



    There is also this thread (from the Manifesto)that shows the cam colour markings (I am sure you have seen this already) How can you identify Nissan VVL camshfts?

    It's hard to tell from your pictures but you might have the cams turned slightly inside of the caliper which is why your measurements are off? Centre of the base to the highest point (peak) of the lobe is where you want your caliper contact points to be.
    Last edited by B15NEOVVL; 08-03-12 at 05:04 PM.
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  19. #19
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    Note that the info about the 16ve cams miko post is wrong.

  20. #20
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    OK, so I wasn't reading the measures properly, I think I got the right ones now,

    Exhaust:

    - Low lobe: 36mm
    - High lobe: 38,7mm

    Intake:

    - Low lobe: 37,6mm
    - High lobe: 38,75mm

    I'm feeling this is bad news....

  21. #21
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    Those look like measurements of SR20VE cams

  22. #22
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    Post up some good quality pics of the cams.

  23. #23
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    Here is a video,



    I'll post pictures tomorrow

  24. #24
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    These are the pics I promised,






  25. #25
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    P11/U14/Y11 Standard 2L cams
    Last edited by pTen; 08-06-12 at 01:37 PM.

  26. #26
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    Quote Originally Posted by pTen View Post
    P11/U13/Y11 Standard 2L cams
    I've been scammed

  27. #27
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    Here is a picture of mine from last year, with stock cams. Orangey-red on the intake, beige on the exhaust.



    Based upon the measurements you gave and the pictures you provided, it doesn't look good.

    Did you buy the cams off of a forum member? Have you tried contacting them for clarification? Maybe somebody just made a mistake and they would be willing to rectify that mistake.

  28. #28
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    Quote Originally Posted by B15NEOVVL View Post
    Based upon the measurements you gave and the pictures you provided, it doesn't look good.

    Did you buy the cams off of a forum member? Have you tried contacting them for clarification? Maybe somebody just made a mistake and they would be willing to rectify that mistake.
    Nobody from the forum, I bought it locally. I just called the guy that sold them and he insist they are sr16 and that he doesn't have money to trade them back.



    I learned the hard way...
    Last edited by Nicoxis; 08-06-12 at 07:16 PM.

 

 

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