how much boost to run at teh track?

[LOwrestling2001]

Hi, i currently have an s14 with an s13 redtop in it, with stock turbo and everything with fmic, downpipe, turbo extension and exhaust (and koyo radiator soon). not too far down the line i'll be goin to the track (road course), and was wondering how much boost i can run on stock injectors/ecu, i have a walbro 255lph fuel pump also. i was thinkin of upgrading injectors and maf and to power fc, buti dont know if i'll have the funds for that stuff before i go to the track, so i'm thinkin how much boost could i run at the track on stock injectors/ecu/maf, and how much with injectors/maf/powerfc? thx

[lbcklik1486]

I think the stock t-25s could only hold 15 psi max.. anyone correct me if im wrong.

Jay

[HaLo]

Stock everything, I wouldn't go over 11psi. The intercooler might start being inefficient at that range. If you upgrade the injectors, maf and go with a FMIC, 15psi might be the most you can get out of the T25.

It's not really worth the injector/maf upgrade unless you have a turbo upgrade.

[LOwrestling2001]

with stock turbo and everything with fmic, downpipe, turbo extension and exhaust

and steeles just took his turbo to 18 psi the other day, not that that is healthy for it...but just for fact.

btw i'm also running a walbro fuel pump 255 lph. so basically...fmic...fuelpump...downpipe..O2extensio n...exhaust...and radiator soon

[LOwrestling2001]

also, my question wasn't more of what i can run daily, but like at track conditions...of continuous running for 20-30 min sessions somewhat pushing the car.

[240racer]

if you are concerned about overheating, then get a good gauge or radiator, or both. If you are concerned with how much boost will wreck my engine, then run less. I doubt you will be much faster if you run 15lbs instead of 11lbs or even 7lbs, but you can try to prove me wrong if you want. Go to the track to learn how to drive, not to tune your engine, do that on the dyno or maybe at the drag strip where you can be more consistant, etc.

[LOwrestling2001]

haha, not that i've never been to the track before or anything, just not with a 240 :) not concerned bout over heating, just fuel delivery (proper).

[nrcooled]

When I went to Virginia International Raceway I ran 10psi and had a great time w/ no overheating or fuel delivery problems. Anything more and I think you will heat saturate the i/c and just burn stuff up.

Then again I am running a SMIC:rolleyes: It was fun as hell and I thought it was plenty of power. I was passing 944 turbos and keeping a 350Z at bay (not for long though;) )