stock injectors, all bolt ons, still rich, -11% on afc to cure???

[nazthug]

I have a 1999 gst with all the bolt ons, turboback, intake, uip, bov, ADFX smic, profec b, stock turbo, stock injectors, stock fuel pump, safc.

I also have the plx m300 wideband.

At 15psi, when i first set it up, i was below 10:1 a/f

After i started tweaking, i am now at about -8 up to about -12% on high throttle in order to keep the a/f between 10.8:1-11.5:1

Is this normal? With all these mods, i would think i would have to start adding fuel

before the downpipe and adfc smic, it hit 209whp on 91 octane

So whats the deal? How can i possibly still have this much fuel left?

Im gonna get a pocket loger to check out the timing curve, but the widebands dont usually lie

and i figure low 11's is still rich

if i put it all back to 0 across the board, it just goes below 10:1 and just doesnt sound healthy, the engine doesnt sound like its working, sounds flooded and slower, doesnt bog yet, so its not filthy rich, but it definetly feels faster at the current settings

Whats is it?

 

[CanadianTSi]

the T-25 sucks...that's your problem, it just can't flow enough air to max out the pump and injectors.

If I remember correctly one of the guy's that was running mid 13's on the t-25 said he was taking away fuel with the S-AFC. I think your on the right track.

 

[nazthug]

cool, thanks

 

[Blk_99gst]

Huh, we all know are cars run really rich from the factory, but as you add more mods and make more power, usually things lean out a little bit.

I could see one being -5 to -10 % on the high side with your setup. I applaude you for doing things right and having tuning capability, instead of just guessing and leaning things out. As long as your 11.5:1 on the wideband, I would say leave it where it is.

I am VERY interested if you can get your hands on a pocketlogger, to see what your timing advance and o2 voltages are with those settings. If you wouldn't mind, PM me that info if you ever log it. Thanks...

 

[nazthug]

i'll be getting a obd-2 logger next week for my laptop so i can check timing and stuff, tht would be interesting

but i'll tell you what, if i 0 it all out, wow the car is way slower, it just feels like its running way rich, you cant even tell that the engine is working

I love widebands, i used it on my turbo focus and im still using it now, i couldnt tune any other way

 

[Blk_99gst]

Originally posted by nazthug

I love widebands, i used it on my turbo focus and im still using it now, i couldnt tune any other way

Gosh I can't wait! I ordered an LM-1 wideband and it should be here in less than a week. 5 eclipses and I dynoed last weekend, which is when I saw the importance of a wideband.