2001 B4c

**sleeper** · 10-10-2006, 12:55 PM

Has anyone compared the 2001 (98-02)B4C tune to the normal Z28 tune.
I now read couple places where the B4C is running more aggressive tune? also have read no differance; but they don't know for sure and then some say no. I have not got all $tuff yet to do this, just getting to P59

**2001shpcamaro** · 10-10-2006, 04:46 PM

I know it runs a little richer and the program is a lot different. But some people will argue,i have a 2001 b4c. And i think its different by a long shot

**hwyhog** · 10-10-2006, 06:10 PM

I would like to know also. Would a hand held tuner help or hurt the factory tune if it is any different?

**02B4CZ28** · 11-29-2006, 08:09 PM

i would'nt mess with my tune...damn thing runs perfect!!!

**SSpdDmon** · 12-01-2006, 12:00 PM

I compared a stock f-body tune to a stock C5 tune (2002 for both) and there was quite a difference in the timing table and fueling tables. Some spots in the f-body tune had up to 9 degrees of timing taken out. For the most part, at WOT, from 1800-4800 RPM, is where the missing timing hurts the most (3*~6* removed from f-body). However, above 4800RPM the f-body had a little more timing than the C5 (2*~3* more). Also, the C5 tune had a commanded AFR of about 0.5:1 leaner than the f-body throughout the RPMs.