pologreen1

I am considering dumping efi for carbs for a couple reasons. The motor on a stand is like 700hp. Been on chassis dyno bad efi tune and shutting itself off at 5K made like 500rwhp and tq roughly. Rev limiter 7K.

I currently have a Motown single plane on the car and would like to know what size carb to use on that if I stayed with it.

The next option is I want a tunnel ram so what size carbs for that one?

434
AFR 220 comp port heads
Howards cam 248-256 @50 110LCA .650 lift
Howards 1.6 rr's
3.45 gears / auto
10.8-11 comp

MelWff

I would try a 800 CFM DP on the Motown
for the tunnel ram
https://www.holley.com/products/fuel...s/parts/0-4224

pologreen1

I went Holley 850 HP DP/electric choke.

fisheson

PG!, im interested in what makes up the bottom end to arrive at the 434, 400 block,6.125 rod setc..............thanks

pologreen1

It's not recommended to take a 400gm block to 434 has been done though. Dart Aftermarket block.

http://shop.whiteperformance.com/SBC...D-DRTBLOCK.htm