Well. I was hoping for a bit more. But I hear the 35" tire&wheel brings the numbers down ... so I'll keep tweaking the tune and see what. get.

Does anybody else see more top end with the stock intake ans tb? This thing falls off at 5300 . These heads made great power on my 383 at over 6200...

 

What Gears are you running with the 35's??? I would think it would pull higher but maybe you need a different cam for your particular set up.

Have you checked you Fuel Pressure at WOT to see if it's dropping off??? When was it and the filter last changed???

I am not familiar with the LS3 injectors, out of curiosity what do they Flow???

 

I am trying to figure it out. The ls3 injectors are 39# I think. But I only have the 8.1 injectors.

I am not sure about this filter so it will get changed soon.

4.10/4.11 and 20x10" wheel and 35" tall tire

141mph at 5700 rpm...lol

 

Does this seem ok? Does it seem low?

I wish I could do a turbo or whipple...lol

 

Well, I'm changing directions....
Broken valve spring causing to heads to be removed... going back to 317's. ready for turbo build....
Thank God... No damage but the broken spring...

 

what springs was that?
cam has .600 lift correct?

 

They were com918 springs and yes .602/598 lift.

 

Well it is all together with stock 317 heads and double springs. .. but I grabbed a little something else to help..
But this is my mock up set up

 

Nice!

I know I want to build a turbo setup, but a clean and simple SC is hard to ignore for such heavy trucks.

 

I'm do have a fmi for it but I may just try it out like this first. .. just needs the torque. ..