907rwhp
#1
907rwhp
04 silverado with an s485, 6.0. stock 706 heads, hi ram, studs, 22# and 21* of advance past peak torque. .81 lambda because the twin 450s and 210s were at 112% duty cycle.. so we couldnt go up in boost. 3rd gear pull unlocked 80e with a 252 circle d converter, the dip at the end of the curve is the lack of fuel pressure. 907rwhp.. was expecting more power but thats what it made.
#7
TECH Fanatic
iTrader: (12)
That could be, the 450’s nose dive hard after 60#, I have the same setup being dyno tuned the 31st, I bet your loosing fuel pressure and the injectors are trying to make up for it. I wouldn’t be surprised if you backed off your fuel pressure if it wouldn’t support more.
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#9
unfortunately the base couldn't be brought down, the return was too small so the regulator couldn't maintain a 3 bar pressure. Hence I just decided to tune it like so since they brought the vehicle from a ways out with a couple hours notice. The wastegate works perfect, and yea I am sure its the pressure that is killing these pumps up top. Its a t6 1.32 96mm turbine, best time is a 6.0 at 116 in the 1/8th before the stock 80e input shaft broke on the launch