O ok so you spike at 23 then taper to 21or 20?

 

No, high EGTs do not mean you're lean. In fact, you're more likely to get high EGTs when you're running rich. You cannot use EGT as a pseudo wideband. Also, wideband o2's don't have knock sensor - that's a separate tool.

Capt Kim, you do not use an EGT to determine what boost level is proper. You would need to log your timing to determine knock or use a knock sensor of some sort to determine knock counts.

 

im on 93 oct and run 26.5 lbs.

do you understand what detonation is? not being a *****, im being serious.

 

If you're running 26.5psi on 93oct, then you're just begging for trouble. Please don't spread that info, because there may be other people who don't know any better and will try to do that. 26.5psi is the max I run on 93+alky. Doing that on straight 93 is just plain dumb.

 

yep it would be if i had knock/detonation (same damn thing) of any sort. besides no knock im currently (if i walked out and ran my car right now) at 25psi and my afrs are anywhere from 10.8-11.2 so i know what can safly be done. im not being an advocate and saying hey follow my lead. im just saying it can be done.

 

it was left rich because of the cold weather, we had it tuned to 26.5 psi after about 7-9 pulls on the dyno, so 2 guages readin afrs and close to heat soaked i pulled off the dyno turn the boost down a smidge and had it left a little rich.

 

The answer is methanol and u can run 28-29 psi ease I run 28 non stop on my evo 9

 

on 93 pump gas

 

i agree...my meth is currently in the mail.

 

Well thats if you lean out the mixture at peak egt. Also of course we cant use that only as a wideband, that would be catastrophic. Also of course the knock sensor is separate. However, the device I named off also reads knock via the knock sensor. Its a pretty neat gadget.

http://www.turbobits.co.uk/acatalog/...egt_gauge.html

First paragraph. Your slippin warr. I think you are reading too many newbie threads.

 

Why would you run that much boost on the stocker? You only spike at theat amount not hold then taper. So it rendors that amount of boost pointless. Also your stock d-valve isn't made to handle that much boost so you are killing your turbo when doing that. If you are running alky or meth thn 25 is the highest I would advise on the stocker.

 

Yes that is correct

 

The second time my car was custom tuned by Al at Vividracing we found out that the highest WHP and TQ numbers were obtained at 28PSI on my car.

We went above 28PSI and lost power and torque. We did the test on a Mustang Dyno. Raising the boost not always gives you more power specially when you max out the turbo.

You could modify the tuning to get more power at higher levels but them you compromise the reliability of the engine.

I am running 26-28psi on my MR but I use Methanol. I hope that help to answer your question.

Carlos

 

What?

 

You've never heard of that? I am shocked! Here let me explain better for you warr.

The hottest possible exhaust temperature is called peak EGT. If you lean the mixture at peak EGT (ie. reduce the fuel flow) the EGT drops and you are running lean of peak, or just LOP; if you enrich the mixture at peak EGT (ie. increase the fuel flow) the EGT also drops and you are running rich of peak, or ROP.

I hope that helps ya.