Hemifever once told me that 13.2 is the best A/F for making power a WOT run and to not let it get over that. Mine stays right at 12.8~13.0ish (safety factor) and doesn't really flatten up into higher RPMs. Sounds like your fuel mapping is off.

If you have a means to datalog, you could send him that file and he could readjust. Or perhaps a dyno run of 2 to dial it in.

 

13.5 to 13.2 isnt that far of but I am having him richen me up. Hughes racing is having there programmer look at my fuel map. There guy is familiar with writing maps to go with the intake.


What about fuel sync. Could that make that big of a difference?

 

Only if it were way off, and you'd also have poor idle and generally poor driving feel in general.

 

good idle and great topend

 

Just an idea here but... maybe your too rich at the low end and your drowning your engine with fuel. I dont know if 14.7 is wayyyy to much for idle but that does seem kinda high.

Reason I bring this up is from my experience with bikes, if you have the carbs or injectors throwing to much fuel it the bike will run like crap at low end then scream across the rest of the band.

 

14's is suppose to be perfect for idle. Sean has told me my WOT should be 12.8. He has changed my tune one and said my idle could be lowered as well but hasn't sent me anything. I need to data log some more I guess and hit him up. My WOT is better but still hits the 10-11 range

 

Just talked to hughes and they said that my tune looked good. so that is not the issue.

Fuel sync?

I am going to look for a stock intake to put back on the truck because nobody has givin me an idea that has worked.

 

what size is your exhaust and throttle body ? do you have a modded throttle body ??

 

READ!

I am running a 53mm tb, 2 1/2 duels without cats

 

No, Jbomb's running that