Hey guys,

My previous best run from the 1st time I went to Moroso was 15.23@91.96. I went back for Test n Tune last night.

This time I went full trim however (last time I had removed the sub box, rear and front pass seat. Same amount of gas was in the tank). BTW, my car, full trim (leather power seats, no sunroof, 5spd of course), with only an 1/8 of a tank weighs 2970lbs .

Anyways, 1st run=
60'= 2.547
1/8= 10.199@71.59
1/4= 15.610@89.82

I bugged launch in this run. Launched at about 2200, car jerked then went. I did granny shift 2-3 shift also.

2nd run=
60'= 2.518
1/8= 10.671@63.96
1/4= 16.527@81.02

Launch was a little better, didnt bug but I did spin too much. Launched at 3000. I missed 3rd in the atempt to shift faster , so after that I just cruised down the lane chillin.

3rd run=
60'= 2.462
1/8= 10.05@72.50
1/4= 15.368@92.37

This time I launched at 2700, and it caught just fine. The 60' time is actually slightly slower than my PB from last time (2.45), but the trap speed is a little higher. I assume due to my faster shifting for this run. I also held 3rd in this run, where in my last PB I shifted into 4th. The fact that the actual time for this run was just over a tenth slower I attribute for the fact I ran full trim this time.

I went last night in the effort to get my 60' down into 2.2-2.3, now that I knew how the track was and I added traction bars since then... but to no success. The traction bars did their work tho, got rid of most of the wheel hop I used to have. So its me that's messing up something. I think its all on the 60' because 92mph is more or less where I should be for my mods, concidering the 80* temperature of the night.

Any hints that you guys might share with me on launching? Im running street tires (fuzion ZR1 225/50-16s on Z32 wheels, pressure @25psi)

 

I personally think your scared of hurting the tranny because your not shifting as aggressive as you should be. and by being scared you either shift a little slow or miss 3rd. Just go to the track and give it your all and dont worry if the tranny is going to get hurt (its not, its all in ur head lol), just do it. Your car is defenetly making the power, and i dont think its the tires, its you that is holding it back. thats my .02

 

yea I know its me, the car has the power (dyno'd 191whp/195wtq with missfire from crappy coils, now replaced), so that's not the problem, its me, lol. And yes I am scared of my tranny, Im trying to improve tho. That last run shifts were awesome. But I guess when i have a new transmission layin around, I wont feel bad to beat on it like it owes me money, hahah.

 

Don't believe the hype. Those numbers are inflated and you know it. Secondly, i think your car is actually down on power. I'd remove the y-pipe to see if the flex section has collapsed.

 

slam them gears bish..

 

I will do that this weekend along with elongating the shifter. s0ber suggested that my STS might be set too shoft and I've become used to shiftin slow to avoid grinding. So Im gonna extend it a little. I have to take the cat out anyways to do that so I'll peek inside the ypipe. If its bad, Hotshots will be ordered.

 

Your dyno #'s don't reflect your trap speed on your decent runs. for comparo when i had dynoed 170-178whp i was trapping 93-94mph. According too your new dyno #'s you should be trapping from 96-99mph

 

I agree, I doubt you car is making that much power, or you would be trapping higher. Even with the power you have you can still run 14's you just have to drive the car hard, and launch MUCH better. How are you launching? Are you just dropping the clutch from a certian RPM? I get my best lauches by slipping the clutch. I usually lauch around where you were on street tires, but I slip the clutch so I can catch traction (don't ride the pi$$ out of it, you will just need to ride it for a second as soon as your car starts to move foward). I was able to cut a 2.0x 60' on my drag radials. You may also want to try dropping your tire pressure a little bit more, I run ~20 psi on street tires. If you can get youf 60 down and shift fast you can see 14's with your power level and current weight.

 

2970lbs. is this the car only ? was the temp hotter these runs versus you pb of 15.23 ?

if you asked me, i think you would have beat your pb with the same weight setup as the 15.23. You were what at least 70-100 lbs heavier and still trapped a hair higher, being only .13 off your pb.

i have lots to learn about drag racing, but it would seem that racing in a heavier car (seat and stereo equip) with the same hp/tq would make it harder to lower your 60 foots.

besides all my useless babble, good work in the max !

 

Well since launch is where Im doing the most work on, I was experimenting different techniques just to try them. Those 3 runs I was dumping the cluth. Seems when dumping the clutch 2700 was the best bet. However, it still wasnt faster than my PB of 2.45 from the 1st time at the track when I slipped it from 1400. So at least now I know FROM EXPERIENCE (not from what other people say works/ doesnt), that on my street tires, higher rpm launched do caca. I'll try dropping the pressure to 20 and see what happens next time I go, thanks for the input.

Ceasar, yes 2970lbs car only, I was off the scale. I weigh 160lbs so 3130lbs is what the car weighs with me in it. Yes last time I went the temp was in the mid 70s and no where as humid as it was last night. Lol, yes I know its harder to lower the 60' with more weight, but I was also trying to see what the car does the way it usually is on the street. But even with full trim, I should still be able to land a better 60' time than 2.45, 2.3x is more where it should be. So we'll see next time I go.

So things to do,
- Dyno to check if anything odd is going on (june 17th)
- Elongate the STS a little and check the flex on the ypipe (Saturday)
- next time at the track slip the clutch from 1400ish, drop the tire pressure to 20 like suggested by cardana, and take off the seats like last time

 

your trap seems OK for the horsepower, but the ET is off. are you sure you werent getting tirespin in the best run? something wrong with the ET

 

Barely any. Chirped when I dropped the clutch, that was it. I had 2 friends on the side watchin and they agree. Tires caught perfect.

 

interesting, yeah i think its time for you to check into your mechanical.

 

you've gotta improve those 60' times... that's the entire reason you're not in the 14's... and that trap is really low for the amount of power you dynoed... you should be seeing upper 90mph traps with that kind of power

 

Oh really? Then you need to try launching harder. You don't want to spin much but if you are doing clutch dumps then on street tires you should be loosing traction. I slip the clutch so I don't spin off the line, if I could drop it and hook on street tires then I would do that. I usually chirp second pretty hard, and I also chirp third (assuming I shift fast enough).