so when is lean to lean
05-19-2005, 03:02 PM
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Car: 88 Trans Am
Engine: lt1 intaked 355 makin 277 on 25 psi of fuel pressure and stock timing :)
Transmission: A4 stock... that moved a mobile dyno a foot shifting into 2nd :)
so when is lean to lean
ok guys i have a ? here .... i was making 277 rwhp on 25 psi of fuel pressure.... and my a/f graph on my dyno sheet looked bad... started off the pull around like 12-13:1 then went over 15.2-5ish:1..... so my question to u is when is lean to lean and should i see a nice HP increase with increased fuel pressure and more timing? here is the graph....
Why so low?
05-19-2005, 08:07 PM
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Car: 88GTAnotchbac/91 -Z/66 Chevelle
Engine: All strokers
Transmission: Pro built 700r4's
Its too low when you have signs of detonation Pinging or a surge from lack of fuel.
Bump your base fuel pressure up 10 more PSI and run the car again and post what happens.
Rob
Bump your base fuel pressure up 10 more PSI and run the car again and post what happens.
Rob
05-19-2005, 10:44 PM
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Car: 88 Trans Am
Engine: lt1 intaked 355 makin 277 on 25 psi of fuel pressure and stock timing :)
Transmission: A4 stock... that moved a mobile dyno a foot shifting into 2nd :)
the low psi was because of a failing fuel pump.... i have now installed a 255lph pump... i now have 45psi at WOT gonna take it to get it dynoed agian i have since advanced some of my timing tables and gonna take it and see what she will do..... hoping for alot more but as u can see it was running up in the 15.2is:1 and it was makin me scared... didnt wanna blow my motor up... and i think it was robbing me of alot of hp.....
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