Okay,Just wanted to bring everyone up to speed on what I have been doing to my ‘96 Trans Am LT1 0411 PCM conversion I’ve been Collaborating with Carl (“Intech”) to get my project working. Just so everyone knows, I have “TunerPro RT” For tuning, and I have my bench tuning harness/LSDroid and the OBDLink MX+ that I have been using thus far.
I am using an “OTC Genesis” Scan tool to read whats going on with my car(I don't have an ALDL cable for my laptop, so I’m using what I have.
I’m attaching my Bin file for everyone to review, and suggest any changes that you feel will help me get this beast dialed in. The engine is stock (for right now) I am getting ready to drop a 383 LT1 Stroker in it. The new engine has right at 11.5 to 1 compression, the LT4 “Hot Cam” and ported stock heads with1.6 Ratio rockers. Comp valve-springs/retainers/push rods.Scat cast steel crank, Scat pro comp rods and all ARP
hardware. I have deleted all the emissions, rear O2’s, evap etc.....I have updated the MAF to the newer “Truck Maf” and conversion table. I will post my last set of readings taken ( before I found an injector stuck open) that has since been fixed.
The car Idles kinda rough, but still idles. It has a little off idle stumble, and probably needs more advance. One code I got after I got it running was from the cam position sensor fault ( there isn’t a cam sensor on my engine) I’ll have to turn that off in the tune. Basically, this engine is running like a 2001 Vortec L31 350 without a distributor. Batch fire fuel injection -vs. Sequential fire. Same ignition coil/module same firing order, only using the opti spark distributor as a cap and rotor.
no opti electronics being used. It is using the crankshaft position sensor and reluctor to fire the engine.
Here’s my readings that were taken most recently:
RPM’s. 2443
IAT. 75F
Spark. 35deg
IAC position 209cnt
Baro press. 17.65 inhg
CMP retard. -28deg.
Desired IAC airflow
18 g/s
Desired idle speed 825 rpms
ECT- 109F
Engine load 82%
Fuel Trim cell 21
Fuel trim learn disabled
H02S bank 1sensor 1v
456Mv
HO2S bank 1sensor 2v
447Mv
HO2S bank 2sensor 2v
443Mv
HO2S bank 2sensor 1v
464Mv
Ign. 1 signalv 13.5v
Knock retard 0 deg
Ltft bank 1 0.0%
Ltft bank2 0.0%
Loop status open
MAF sensor 25.51 g/s
Map sensor 7.38 inhg
Map sensor Volts .77v
Stft bank 1 0.0%
Stft bank 2 0.0%
TP sensor volts. .22v
MAF Sensor hertz 3236.8 hz
My .Bin file :
Please feel free to suggest what I need to make this beast run better.
Probably more like the stock LT1 spark and fuel tables.
Thanks!
Ben Smith
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