Will this factory computer let you know if it is lean part and wide open throttle? . Its running great with the stock tune, I just want to make sure I am not running super lean. These are my changes from stock..
3.766X3.750 343CU IN, 9.7to1 Crane H Roller Ca. Legal 214 220 112 480 500 W/ 1.6 rockers Trickflow 175 heads,TPI Edelbrock fully ported lower, SLP runners, they look stock. Ported upper . Hooker shorty Legal headers. Magnaflow full exhaust with legal Cat. 22 Lb Injectors fuel pressure 43 lbs, 52MM thottle body,Timing at 9 degrees.Thank in advance for any help!


Well a update with a question... I have my car running its the above engine specs. It fired right up on the completely stock ECM and set all adjustments to OEM specs. The car runs perfect feels very strong ,No codes and Passed California Smog with no problems. Is there any Major performance advantage in messing with the tune?? I did purchase the Moats setup with extra chips. a while back , But if its just a minor difference , say 20 hp or less. I would rather not touch it.. Looking for ECM Pros to chime in.. FYI on a superflow 901 Engine Dyno with a Dual plane and 750 Carb. The engine made 390HP and 410 FTLBS. I didn't have the wiring to run the TPI on the Dyno..

 

You need to datalog (ALDL to USB and something like TunerPro RT) to see what the BLM values are.

BLM of 128 = perfect. Under 128 = rich, over = lean. With that cam and intake setup you'll most certainly be lean. With my setup I have the injector constant set to 18.55lb right now, meaning I was lean, and set it to that to add fuel to compensate. Most BLM values of mine are within +/- 4 of 128 after fiddling with the MAF tables.

It tells you the BLMs at part throttle (under various load conditions) but for WOT you would want to use a wideband o2 to get it perfect, but if you get BLMs looking good throughout the range you can expect WOT to be fairly close.

A tune is worth it. Sounds like you already have the gear for it.

 

What do you guys think about me just trying a Jet Stage 2 Chip?

 

Not worth much of anything tbh