jj_z28

iTrader: (14)

my car is way lean, mods are in sig and I have the stock injectors and pump. I have a bigger pump now from TSP, but it did not come in before the dyno. Right 02 sensor was not working and is tuned by TSP (mail order). I trust no one around here to tune an ls1 so maile order is the only way unless I take a trip. The guy that dynoed my car kept calling it an lt1, I had to keep correcting him, just bothered me.

all readings were taken from 2000 rpm to 6000rpm at WOT
knock retard - 1.2 to 5.6 at WOT
injector pulse width - 12.6 to 17.2 at WOT
Air/fuel - 15 at 2000 rpm to 20.2 at 6000 rpm at WOT!! Idle - A/F is 14.1
timing - 38 to 28 degrees

Also, I forgot the Graph at his shop, but I'm picking it up Monday and I will post that. The graph is missing some info in the upper rpm, line dissapears then comes back, he told me that was the car miss firing?????

jj_z28

iTrader: (14)

Here is one run
no graph yet

jj_z28

iTrader: (14)

foff667

iTrader: (2)

i'd talke to tsp and see what they say about it...did u get a scan of the run as far as KR, timing, rpm, ipw's, commanded a/f, blah blah blah...you might wanna post it if you do still want help from us...but mail tunes usually have to have a dyno readout to be able to fine tune the a/f mixture.

lata
Bill

mr2guru

iTrader: (16)

Might have a header leak somewhere drawing extra oxygen (false readings). Those AF's seem unpossible without SERIOUS knock.

gtodoug

iTrader: (1)

I have a couple dyno charts with a/f readings like that. Turns out a/f probe blew out the back.

jj_z28

iTrader: (14)

These are the only two charts I have. He was having trouble keeping the Air/Fuel meter on the end of my turndowns. But since then, I installed 02 bungs and installed Bosch 02's. U think I should go back down there w/ my new parts and my new fuel pump and have him dyno it again??? I also don't hear a header leak but u never know.
Maybe I will have check out his own equipment, see if there is an issue.