I am having of a problem with detonation above at 10 psi or higher. I have the datalogger hooked up and as soon as I enter boost the timing is dropping to like 15-17 then by like 5 psi it drops to 10-12 and stays there. My O2 readings are .94-.96 and my egts never go over 1400. So I am running with everything in spec. Acctualy a little rich cause I am getting codes for being to rich. The problem is even with everything just right I can run 10-12 psi at like 80% throttle but as soon as I mash it to Wot I get detonation. I let off a little and it goes away. What do you think would cause this. I know some of you guys are dealing with the closed loop, open loop stuff, but My car seems to run pretty smooth as far as the transition from vaccum to boost goes. So I am stumped. Also To let you know if it matters I am running 370cc injectors and a sfmu with the 2.72 disk @80 psi For 10 psi of boost. A little rich.

your not using a SAFC right? at 17psi, with just a SFMU comtrolling my injectors, i only see 17-19 degrees of advance at WOT. but i get NO detonation whatsoever. maybe you are one of the unlucky few that need timing retard no matter what.
www.TeamKLR.com
1997 Silver RS
Wiseco 8.8:1 Pistons(back to low compression!)
Eagle Rods
T3/T4 Turbo
Custom FMIC
Greddy Exhaust
440's
Most current 1/8th mile time: 8.3@90mph 2.015 60'(Nitto Drag radials, i suck)

what kind of gas do u have in there? maybe it was bad?



14.7 @ 93mph / 7psi 185hp/180tq

well shouldnt I need to retard the timing at 10 degrees. I was using 92 octane cheveron gas. I am going to try some octane booster.

Do you mean retard the timing at anything above 10 degrees advance? if so, the NOOOO. retarding timing too much can cause as many problems as advancing it too much. at WOT, you should see around 19-23 degrees of advance, and best case scenario, get no detonation.
www.TeamKLR.com
1997 Silver RS
Wiseco 8.8:1 Pistons(back to low compression!)
Eagle Rods
T3/T4 Turbo
Custom FMIC
Greddy Exhaust
440's
Most current 1/8th mile time: 8.3@90mph 2.015 60'(Nitto Drag radials, i suck)

are you sure its detonation and not just missing? or extra fuel combusting in the exhuast from running to rich (i had that prob for a bit)?

I see ur stage 3, did u up the compression when you rebuilt?

What do you use to avoid fuel cut? ML or black box?

as of right now I am using the Missing link. And the noise is coming through the ignition box in my glove compartment. Also the pistons are 8.6:1 JE with crower rods.

Look for loose wires or a loose knock sensor.

sweet mother of god you have a clean ride. kudos

what did you get those headlights!? neat-o!