Bill's 02 Z-28 SS

Hi Folks
MY 02 SS has stock MAF, LS6 cam, ported LS6 heads (11.2:1), 36# injectors, SLP Long tube headers and cats. Modified the IFR table achieving a LTFT of -0.8 at idle and partial throttle of -4.7 B1 & -3.6 B2. That appears to be OK. Now I want to modify the PE Table but the formula I have requires “wideband” logging for AFR but my AUTOTAP (removed in the latest version), EFILive or HP Tuners does not have AFR data.
How do I get the AFR at different RPMs? If I don’t have that data how do I scale the PE Table to achieve 12.7 or am I looking in the wrong area?
Thanks
Bill

Bink

You need a wideband O2 to adjust your PE/RPM. Buy a Wideband or head to the dyno.
I think i'd buy a wideband.

joel

Bill's 02 Z-28 SS

Thanks
Can I use the wideband 02 sensor with my PCM ?
Bill

horist

yup it's a seperate unit... my internet conection is being a bitch right now...

but look at the LM1 (www.innovatemotorsports.com I think ... not 100% sure... stupid covad)

I have my wideband installed seperate , and I replaced my stupid lighty AFR gauge w/an actual AFR gauge from innovate....

TT_Vert

iTrader: (12)

why the HUGE variance in LTFTs??

Dave

Bill's 02 Z-28 SS

hi Dave
I assume you are talking about the -4.7 to -3.6 that is the average after taking data for a 35 minutes. During the run, I was monitoring the LTFTs and that was the difference. I don't know why and did not know that was not good. I'm trying to learn, so any help would be appreciated. The band 1 sensor 2 is setting a fail code every so often.
Bill

TT_Vert

iTrader: (12)

no i didnt see a negative sign in front of the 4.7 before. I saw 4.7 to -3.6
FWIW, the sensor 2 on either bank is strictly to monitor cat efficiency so i wouldnt worry about that. I get P0420 and P0430s after LT install I just deleted the codes in hp tuner.
Dave