egt/o2 readings are arguing

91gsx · 07-25-2002, 09:41 PM

on a 2nd/3rd run tonight attempting to do a quick tuning session, at the top of 3rd gear my egt's hit 1600 * F (after some afc adjustments), but my 02 reading only went up to .82(after the same adjustments). i know that o2 isn't really an effective way to tune, but shouldn't they follow a little closer? correct me if i am wrong but shouldn't the o2's be around .88-.92? i know that i want to be around 1600*F peak as far as egt's go. any help would be greatly appreciated.

ps my timing went from 18-20, stayed & crept up to 24 as the rpm's increased. i know i want to be around 20ish, 24 shouldn't hurt much,,,correct?

my knock count spiked to 1 once, other than that all 0's through 2nd & 3rd.

L2RTSiAWD · 07-25-2002, 09:50 PM

If the timing is good,they car is pulling and EGT's aren't melting stuff. Forget the O2's. Every car is different, I pull like a mother and ny O2's are .94 and .96

Later,

91gsx · 07-25-2002, 09:53 PM

thanks for the reassurance, i just thought .82 was really low

91gsx · 07-25-2002, 10:22 PM

now as i reset my mbc back to 18psi (from 14psi) i can expect for a leaner condition, correct?

L2RTSiAWD · 07-25-2002, 10:47 PM

Yes becasue you increased boost and didn't change fuel. Depending on you pump and injectors it may not change that much. But you will probably need to add a little fuel to be safe.

Later,

91gsx · 07-25-2002, 11:27 PM

thanks man