Re: Duty cycle 90+%, dsm 450's, 10psi wtf??
 

i agree about the duty cycles not being accurate in uber and crome. i've pushed injectors into the 125% range before and not truely maxed them.

Re: Duty cycle 90+%, dsm 450's, 10psi wtf??
 

bumping fuel pressure does allow you to take injectors further, but i always err on the conservative side and try not to push injectors close to the limit of duty. as in any electronic or mechanical device...the harder you push them the more likely they are to fail.

i've always seen adjustable fpr as a band aid device instead of getting a larger pump or injectors. however, if someone comes with a car to tune i'll tune it with what they have and push it as far as it can go as long as they are aware of what i'm doing or intending to do.

Re: Duty cycle 90+%, dsm 450's, 10psi wtf??
 

He's running high 10 and lower a/f ratios, that's the problem ;) That's way to much fuel for only 10psi. Lower the duty cycles in boost untill your a/f is closer to 12.1

Re: Duty cycle 90+%, dsm 450's, 10psi wtf??
 

CROME dlog reported duty cycles are way off. Look at your injector M/S in 2d view to gauge how much injector you have left.
As far as 300whp on 450's, Ive personally seen 350whp on 450's. Yes they were maxed, the 2d fuel curve in Uber was off the screen, lol.
Ive also seen 321whp on an LSvtec on 450's.

Both cars had a Walbro. Pretty sure both were on stock FPR's. Although, Im a big fan of bumping base fuel pressures to get some extra mileage outa injectors.

Re: Duty cycle 90+%, dsm 450's, 10psi wtf??
 

that's at least part of the problem