I need advise on which OS to run for my BBC swap. I've been tuning and tuning an 02 Camaro OS but can't seem to get it tuned the way I think it should run.
My biggest issues are:
- Bank 2(even) runs very rich compared to Bank 1 (odd) at idle and part throttle.
- #2 plug gets fouled bad, tends to be pig rich at idle.
- It has a major lean spike on tip in when going WOT
- Unable to log 4L80e specific channels
Car is a:
- 96 Impala SS
- controlled by a 0411 PCM
- running 12212156 OS (02 Camaro LS1) with 4L80E segment swap
Engine:
- L21 454 from a 2000 school bus
- .060 overbore (468 cid)
- Forged flat tops at 8.7:1 SCR
- Stock 4" crank, forged rods
- AFR 265 Oval heads
- Straub Tech cam 229/229 at .600/.600 on a 110 LSA
- Holley EFI intake w/4150 flange with Holley elbow
- Holley 95mm TB
- Accel 44lb/hr injectors
- CNP ignition (LS1 coils)
- Custom LT headers 2 1/8" primaries, 3.5" collectors
Transmission:
- Built 4L80E - early model rebuilt in 2000.
- Circle D 3900 TC