my 1/4 mile times.

[Robchaos]

I just got back from the track. My results weren't quite what I was hoping for, but when you take into consideration that I am running normal falkien ziex 512 195-55 tires, I think that a good set of drag slicks could knock 1/2 a second off my time.
60' 2.342
330' 6.326
1/8 9.573
1/8 MPH 74.03
1000 12.338
1/4 14.651
MPH 96.00

Any input other then better tires and launch?

[cory]

looks like a pretty healthy mph, and with some slicks looks like your car should do 14 flats... good job, get some vids

[2sNOAR]

damn, what does it take to get to the 13's n/a??? i thought for sure your setup wouldve been it...

[Nismo87SE]

You are losing about 0.4-0.6 ET from the 60' you got. With a set of slicks, you should be able to rip some 1.9x 60's which would get you 14.0-14.2s at same mph. If the weather is in your favor (low DA') then all you'd need is a 1.9x 60' with perfect shifts.

[nismosr20]

I ran a best of 14.3@98mph.... but I was running a near stock VE. People are telling slicks and 13's for sure.

[Robchaos]

I think if I change my shift points I will have a better ET on the tires I have. I looked at my dyno sheets and see that my torque curve falls a bit after 7000 I think if I shift closer to 7500 I might get a better ET. I was running it out to redline at the track.

[2sNOAR]

is it possible to hit 13's or low 13's on a sr20de motor? or do you have to swap for a ve to even hit those times n/a? cause i would be satisfied with those numbers from a de if possible.

[Robchaos]

Any engineers out there? Is using wheel Tq as plotted from a dyno graph a good way to determine what shift points should be?

I did a simple excel spreadsheet using the gear ratios to view my Wheel Tq in each gear, and then make a little graph to determine which shift points will bring me closest to my peak tq in the next gear while not keeping me too far from my peak Tq in the current gear.

I came up with these numbers
1-2 shift around 7250-7300
2-3 shift around 7250
then I can either trap in 3rd or do a
3-4 shift around 6500


Those shift points would give me the smallest tq loss and still keep me around peak tq.

[rowdy-gti]

Is the car stripped?......if not with weight reduction and slicks you`ll easily get 13s.

[SneakyOwner]

Originally Posted by Robchaos

Any engineers out there? Is using wheel Tq as plotted from a dyno graph a good way to determine what shift points should be?

I did a simple excel spreadsheet using the gear ratios to view my Wheel Tq in each gear, and then make a little graph to determine which shift points will bring me closest to my peak tq in the next gear while not keeping me too far from my peak Tq in the current gear.

I came up with these numbers
1-2 shift around 7250-7300
2-3 shift around 7250
then I can either trap in 3rd or do a
3-4 shift around 6500


Those shift points would give me the smallest tq loss and still keep me around peak tq.

I forgot who it was but it was on the other forum I dont know if hes here but he was running 13.5 with slicks and his ve.

As for the shifting I dont think 200 rpm would make much of a difference but it makes sense thinking at it from an physics stand point. If you can trap in 3rd do it but last time i was at the track I ran 14.3 and I shifted from 3rd to 4th at 7500 a little ways from the end of the 1/4 and i was trapping 100. As long as you don't hit the rev limiter in 3rd before you finish you should be fine.

[cory]

Originally Posted by SneakyOwner

I forgot who it was but it was on the other forum I dont know if hes here but he was running 13.5 with slicks and his ve.

As for the shifting I dont think 200 rpm would make much of a difference but it makes sense thinking at it from an physics stand point. If you can trap in 3rd do it but last time i was at the track I ran 14.3 and I shifted from 3rd to 4th at 7500 a little ways from the end of the 1/4 and i was trapping 100. As long as you don't hit the rev limiter in 3rd before you finish you should be fine.

idk if your refering to me, coryb13ser on the other forum. and yea i was running 13.4-13.5 at between 100-102mph with my sr16 cammed ve. i was shifting at 8k every gear. this way when my revs dropped they wouldnt drop below 6k and i could finish the 1/4 in 3rd gear with my 23.5in slciks...

[Dbarnett88]

I am no expert by anyones definition of the term and I certainly haven't even tracked my car yet, but I think that after a 4-1 header/slicks/weight reduction you will be more satisfied with the times that you put down... Just my $0.02

[Keo]

Rob, I'm getting a pair of slicks soon and you can barrow it if you like

[Robchaos]

thanks man, I just bit the bullet and went ahead and ordered a set of falken azenis tires. I should have all the traction I want after that.

[cory]

Originally Posted by Robchaos

thanks man, I just bit the bullet and went ahead and ordered a set of falken azenis tires. I should have all the traction I want after that.

i wouldnt bet on it, but good luck.