Re: Air fuel ratio question
Originally Posted by BlueZO6
just wanna ask a question about corvette c6 z06 air fuel ratio ...
I tuned the car using diablosport programmer and i installed diablo tune but i modified the this parameters:
air fuel ratio
I cheked the air fuel ratio by using inovate air fuel ratio gague and it was bwtween 14.7 at low rpm and 11.3 at high rpm ( full throttle )
is it saftety for the car now or it is very rich?
What is the best air fuel ratio reading which is safe and gain more hp ?
Car is moded:
Full exhaust ( Lt headers )
k&n cold air intake
diablo sport tune
14.7 is what you want for normal idle/driving once the car is up to operating temp. (It'll be a bit richer when the engine is cold). Ideal WOT AFR for max power should be around 12.8-13.0. 11.3 is pig rich and is definitely hurting your performance, not to mention fuel economy! I don't know if you can manipulate your MAF tables enough with the Diablo to get it leaned out enough for max power,,,,you might need to get it to a tuner who knows his shite and uses HPTuners, EFILive or LS1edit to get it really dialed in.
You can do this on the street as long as your wideband is accurate and you can safely run WOT in 2nd and 3rd gear for a while without getting busted for speeding or worse.
Hope this helps.
sig by GR8 White
'03 EB/mod blue, LME/V-Max 416, AFR 225's, Comp Custom cam from Pete at V-Max, 3" custom exhaust and lots of attitude!
Z06 Fest member III, IV, V, VI, VII, VIII, IX, X, XI, XII and Winterfests 1, 2, 3 & 4. 543rwhp/493rwtq, all motor!