altereddoug
12-17-2005, 04:19 PM
I am looking to get a set of bbc cart 335 heads ported. Anyone heard of RFD or CFM porting shops? they tell me for around 800 they can upgrade the heads to flow more and reduce the velocity below .55mach. Opinions? What I am being told is that with my combo it is seing a "choke" and heads need to be bigger or go to a .825 lift roller. Well can't unless I flycut the pistons.
doug
> My combination is :
> 4.5 bore x 4.25 stroke
> wiseco +42cc pistons
> dart 335 cnc 2.3 int 1.88 ex
> manley Nextek 250#s installed and good for .880 lift
> Gross lift : .738 int .724 ex
> Dur @ .050 276 int @ 285 exh
> 110 center
> 2 1/4 stepped to 2 3/8 headers
> Injected Birdcathcer
> holley pro dominator intake
> 1950 altered
> powerglide 1.76 first
> 5500 stall
> 4.29 gear with 33 tall tires
>
doug
> My combination is :
> 4.5 bore x 4.25 stroke
> wiseco +42cc pistons
> dart 335 cnc 2.3 int 1.88 ex
> manley Nextek 250#s installed and good for .880 lift
> Gross lift : .738 int .724 ex
> Dur @ .050 276 int @ 285 exh
> 110 center
> 2 1/4 stepped to 2 3/8 headers
> Injected Birdcathcer
> holley pro dominator intake
> 1950 altered
> powerglide 1.76 first
> 5500 stall
> 4.29 gear with 33 tall tires
>