SSDetroit

OK, using my predator data logger, I am trying to get my timing correct before I hit my 125 shot. The data does not compute for me though. Please give me some help on this.

Stock car reading - WOT
rpm Timing Retard
4200 16.5 2.9
5100 19.5 2.5
5800 22.5 2.3

Predator canned tune
rpm Timing Retard
4200 25.5 0
5100 25 0
5800 25.5 0

Predator canned tune - retarded timing over 4,000 rpm by 4 degrees
rpm Timing Retard
4200 rpm 21.5 1
5100 rpm 19.5 2.5
5800 rpm 20.5 2.3

What gives? how the heck can I get timing retard on the stock tune and when I pull 4 degrees out of the predator tune? Running the canned predator tune the #s are perfect, but I am thinking that is too much timing for a 150 shot.

My fuel pressure reads about 56 psi for all three scenerios, seems solid. My A/F is also very close with each, about 13.3:1.

Any help is appreciated. If I were not spraying, I would leave the predator canned tune, but I am worried about the 25.5 degrees of timing?

SSDetroit

Sorry, my data was kind of hard to read. I attached it in a pdf

SSDetroit

I suck at attaching stuff, try this again, its a bit larger print

Steel Chicken

iTrader: (3)

and you know your actual AFR was 13.3:1 how, a wideband o2 sensor?

SSDetroit

No, I have a dynotune A/F ratio gauge - It is the most acurrate gauge on the market, but I know it is still not a wideband. It reads a pretty constant .89 which equates to a 13.3:1 on a wideband.

JDMC5

iTrader: (3)

You need to richen that mixture up a bit to around 11.0-12.0:1. With a 150 shot, I wouldn't recommend running more than 22-23* max timing.

bad6as

iTrader: (17)

aim for 11.7 ish on spray and if im reading right you have 20.5*?