one03sierra

iTrader: (1)

www.nelsonperformance.com

Barely Boosted

Thats always a plus increased hp and mpg who could ask for more

O3GMC

My mileage increased on the first tank, and that is pressing the loud pedal down quite often. Predator shows about 26-28 deg timing and pretty lean compared to before, .890 or so, which is fine by me -

FarmTruc

iTrader: (5)

glad to hear it,

i see more power around 890. than over .900 so you're just about right. just based on other trucks and wide band readings when compared to a predator, you should be running about 12.9 which is perfect/safe. I like to run mine around 13.3:1, some say it's lean, but it works,

thanks,

allen

moregrip

iTrader: (8)

what does 890 mean?

is that degrees via exhaust gas temp?

FarmTruc

iTrader: (5)

450mv means the 02 is reporting a lean condition, 940 means there is a rich condition.

The only accurate way to measure a/f ratio is with a wide band setup. However, if you use atap and your predator alot, along with a wide band, you can get a good idea on what the a/f is by reading the 02mv.

allen

moregrip

iTrader: (8)

what does mv stand for, are we talking tempeature here?

O3GMC

I dont know much about tuning, but seems to me that at my power level, (no power adders or risk of severe detonation) - leaner is better. I'm happy with it now, but if you think I could get a bit more power out of ~13.3 then I may have you upgrade me in the future. Again, I dont know much about how too much timing or 'leaness' can affect the motor if there is no detonation, but I'd pretty much like it maxed out - at least enough for a daily driver

Someday I'll probably want to make the trip over to san antonio and get it just perfect - even tho its very good if not perfect now.

FarmTruc

iTrader: (5)

mv is milivolt, the lower the number the leaner the reading.
for a/f ratio, the lower the number the richer.

thanks,

allen

Hit Man X

Millivolts.