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Okay, so I'm officially confused at this point. I'm asking for some help regarding tuning/engine theory, etc. First off, generally speaking about fuel/spark/afr's, if you retard the timing your afr's should go up therefore you can pull fuel, but should have a loss in power accordingly, right? More timing, more fuel, more power, but increased chance of knock. Providing i'm not missing something here, this is my problem:
Runnin MS2 with low-comp JE's, stock cams, with about 160psi cylinder compression. Tuning idle, I found that the stock ECU's timing values of ~5*-15* or so are probably more for emmissions, (retarding to keep EGT's high), as mine is happiest at like 30*. My ve's are mid 40's at this point. If i do change timing down to say 10*, it goes way lean and I need to bump up fuel to mid 50's. Same for low RPM cruising. If I pull 10* it goes lean, and I have to add fuel. I actually have been getting better power/economy by advancing the timing and REMOVING fuel. I haven't been able to get true dyno time in, and am a bit scared as far as theoretically determining values as the relationships are not like they should be. Retard timing, less burn time, richer afr's.
Does anyone have any thoughts on this? />![]() 
'95 GS w/ t3/t4b
FMIC, diy piping & RFL BOV
MS2-Extra Fuel&Spark
50 lb/hr Holley injectors w/ 1:1 RRFPR
JE 8.8:1 dish w/ Hastings Rings
Eagle Rods w/ ARP bolts
ARP Head studs
Mild port/polish head
3" custom DP/cat section, 3" PIT catback
dual MBC - 12 psi / 20psi
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