View Single Post
Old 10-09-2012, 06:43 PM   #4
Scooby Specialist
Member#: 282204
Join Date: May 2011
Chapter/Region: NESIC
Location: Northeast CT
2011 5 Door STi
Plasma Blue Pearl


Originally Posted by smggtr View Post
Now this was 4th pass and best but my first time at a track.
Its an 05 sti. full exhaust but bad header it may still have a crack. catless up pipe and downpipe. high flow final cat. cold air intake at 16.5 psi. 8.5:1 forged pistons. stock top mount
What do you think about how my car is running and what it might run with a good launch. I was a soft on my launching. and slow into 5th with a bit of lag on spool due to that.

reaction - .5814
60ft - 2.2264
330ft - 5.9882
594ft - 8.4692
1/8 - 9.0162
1/8 mph - 82.26
1/4 - 13.8048
1/4 mph - 102.63
Dear OP I'm not a 1/4mi track god but I've started doing some track stuff now and again. I've also searched out on 1/4mile threads to see what I need to do to be competitive.

for a new person a .5814 RT is ok. If the tree is a .500 tree then you should release the clutch on the third light. If on a pro tree you should release the clutch when the yellows light up.

a 2.2 60ft is slow.... I think that perhaps you are bogging, and therefore not launching from as high as an RPM as you should. There are other factors to take into account and I'll ask that at the end.

your quarter mile time is high. I'd expect a 05 sti with a full exhaust including a header to be in the high 12's. your MPH also suggests this.

The real question:
If you have a rebuilt block (forged pistons) and a full exhaust, then why are you running such a relatively low boost pressure? I'd expect at least 18lbs. but with a built block your engine could handle 24 lbs (your turbo maybe not, but the block could) Maybe the header leak is preventing this?

So why are you so low? how are you recording it? Is it a bad gauge or a poor tune, or you just being very conservative.

I hope this helps.
* Registered users of the site do not see these ads.
CTSparky is offline   Reply With Quote