kirk tarrant

Wondering if a Holley high ram would help this combo
C5 corvette with level x trans and 4000 Stall ,3,73
Current set up
Stock bore LS3 415
GMPP LS9 CNC Heads
236/250 115+4 lsa Cam.
LS3 manifold ported with a 102MM Throttle body.
Timing is at 24 degrees.

This was my best pass and i think there is more in the 60 with better track prep.

1/8 -6.63 @103 with a 1.425 60' Looking for 6.4 (9.99 1/4)

64post

iTrader: (5)

Did you ever try more timing? Like 26-28*. Is your tune done as well as it can be? A hi ram would add power but usually create hood clearance issues, but that may be enough right there if everything else is correct. That doesn’t look like an easy combo for a 9.90 car What does your car weigh?

DualQuadDave

iTrader: (6)

Little more info, what compression are you running? Air filter system? Exhaust? Little stuff can have some easy time in them, just have to hunt.

spanks13

iTrader: (5)

That cam would not be ideal for a hi-ram setup, nor would your converter.

Is this a drag only deal?

Hi-ram is going to want a way bigger cam with more overlap, a 6000 stall converter and at least a 7500 rpm shift point.

All of my ls3 headed motors have made best power at 28-29* timing on pump gas, but I have seen people limited to less before.

You can definitely get into the deep 9's with a 416 so it is really as crazy as you want to go.

kirk tarrant

I have not tried any more ignition. This was first event at track( been closed do to ******* covid)
Compression is around 11.6 ish
1 7/8 long tube headers and dual 3 inch exhaust.
Short 4'' intake with velocity stack type inlet
weight is prob around 3000 without me.

I am going to do a plug read this weekend. Car runs on pump 91+ full can of vp Octanium and meth injection with small nozzle.

kirk tarrant