Bob 96STrimA4

637RWHP 396cu.in. LT1
15lbs boost
9.0-1 Static Comp. ratio
94 Octane

I'm trying to get my exhaust temps below 1500* WOT. Some cylinders are as high as 1625*.

My question: Is 11.5 to 1 AFR to rich? Will this damage my engine to run this rich WOT?

rskrause

Big power from an S-trim A4. Nice!

You will make a few more hp if it's leaner, but rich is safe! I aim for 12.5:1 on the dyno, with some account taken of test conditions vs. likely operating conditions. IOW, if testing is on a day with low air density, we make it richer to account for operation under better conditions, and vice versa.

Do you know the test conditions?

Rich Krause

Bob 96STrimA4

My dyno chart is on my web page:

www.blackknightcamaro.com

zturbo

t-trim cogged setup... Think he has a t56 in the car now (at least think he did last time at the track...


Bob,
Drop a line if you need a hand with anything at the track. Should be going soon with a diff motor to try out. (non turboed for now)

Steven

Highlander

Its not just the 11.5 is that that line is not FLAT!!!!

You have 12.0 all the way which I'd stay there and then richens up.

Bob 96STrimA4

I wanted to richen it up at the top end for saftey with 15 lbs of boost and 94 octane.

You think 11.5 is too rich?

Highlander

Honestly no... but... you should have a smoother curve... f you do... the car will like it more...

LTOne4Fun

those cylinders runnign pretty hot