Hey guys!

I am in the process of tuning my s for boost now and I wanted some opinions on what a safe boost level would be for my set-up. One expert i spoke with said 10 lbs was max, the other said 11-12 lbs. What do you guys think?

here is my set-up:
inline pro stage 1 kit with the standard front mount intercooler and a precision 5858 journal bearing turbo.
ID1000 injectors
hondata kpro
3"downpipe, no cat, 76mm exhaust
vented hood (coming soon)

I want to tune on 91 octane cause you cant get 93 or 94 at every gas station here in BC. :S

I am hoping for 400WHP, but from what I am reading online I may only make 375whp or so on 10 lbs...

let me know your thoughts!
Thanks,
Jeff

 

Give or take 10-14psi. Tuner will be the one to make determination. Depending on dyno 350-425whp. Will be good though.

 

in general 91 octane = about 10-11 psi and 93/94 octane = about 14psi. I'm tuned to 11psi on 91 octane by Church, a well known tuner here in so cal.

Your probably not going to make 400whp with a log manifold on 91 octane. I use to have your same setup and i gain 65whp on straight 91 octane at the same boost lever with the change of a tubular manifold.

 

you will make probably less than 350hp. my car previously was on 14psi with same turbo and was making 396hp (on 93) and that was about the max.


your manifold is killing you.

 

 

yes the log manifold is holding you back from your power goals

 

hmm, ok. Is there a direct replacement for the log mani that I can buy a little later on?

I dont want to have to change the IC plumbing, or downpipe ideally.

 

Any different manifold you will need a different downpipe and hotside intercooler pipe.

 

Boost isn't a real good standard to measure. Some climates would be safe at only 10-12psi... Others could hit 20 on a nice cool night. Just do whatever your tuner says

 

I boosted to 25psi with the Inline Pro stage 1 kit (w/3mm headgasket) using AEM ECU, 93 octane, 3" all the way (test pipe). It made 480whp on a dynojet. Since having the Kpro and "butt-tuning" 12 psi feels comfortable for street driving and occasional WOT.

I'm almost finished with my fuel maps then having my tuner adjust the rest - ignition timing etc. It's going on a Mustang dyno (loaded dyno) and looking for safe numbers so conservative timing 12-18psi range.

So with basically the same kit, using Kpro, 93 octane, moderate timing, 18psi max, 3mm headgasket, loaded dyno, I expect 400whp.

After that, I'm doing boost-by-gear and will keep it at 12psi for street driving and just enable quick-spool for fun!