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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. https://cimg5.ibsrv.net/gimg/ls1tech...9f00263fbb.jpg https://cimg0.ibsrv.net/gimg/ls1tech...bc7a2294a2.jpg |
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Nice setup! |
I’m confused by the lack of fuel issue? Is it on m1 or something? Shouldn’t twin 450’s be good for a lot more power? |
That is weird. Dual 450s and 210# injectors should support that... What turbo kit is that? Or homebrew? |
Its on E and well duty cycle was done so not sure what else to say. I'm sure it was the high base pressure causing the lack of fuel. |
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. |
Set them at 3-bar and go from there. Even on E85... that should do more. What's the wastegate situation? And I assume the T6 1.32 A/R exhaust housing? |
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 |
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