I was looking at the dyno entries and I didn't see any NA dynos in the 400HP+ range. That can't be right. Someones got to be making over 400 NA.

 

I do not think so with a 5.3

 

If any 5.3l engine is going to get close, it'll probably be Closet Red Neck's Z71. With some proper traction it'll run mid to high 12's. Don't know when it'll see the dyno though.
A properly built and tuned 6.0l should handily bust the 400rwhp barrier especially now that the L92's are in their debut.

Richard

 

Yeh, the L92 heads look like they have some potential. So some of the 6.0 trucks are breaking 400 rear wheel.

 

yes, some with ease others not so much

 

I've got two trucks that dynoed over 450 n/a. One has a 408 and the other is with an LS2.

 

Cool, I knew quite a few had to be over 400 NA. What heads were you using with the 450 HP engine?

 

One has #317's and the other has L92's.

 

Hey man, i've tried to do some searching on your TBSS L92 setup and came up short. Do you care to share some info on it like cam, rw#'s etc....?

 

It was the set up Futral dynoed. It is all for sale if you know some one interested. It dynoed 44xrwhp unlocked with a very loose converter. The cam is a custom 224 nitrous cam that Futral spec'd to match the heads.