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Old 01-18-2013, 06:33 PM
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cobalt327 cobalt327 is offline
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Originally Posted by Jkingof956 View Post
still need to work on heads still not finished with them once done i will start swapping
Use the Camquest program, find a Comp cam as similar as you can to the Summit cam, and compare the 2-bbl to a 4-bbl. You might be surprised. Or not.

Cam Quest download

Estimated difference in HP between a 2 bbl (350 cfm) and a 600 cfm 4 bbl:

All 2bbl peaks are: hp @ 4000 rpm/tq @ 2000 rpm regardless of cam (of these three).
All hp peaks are at 4000 rpm, regardless of cam or 2bbl or 4bbl carb.
With 4bbl, tq peak is 500 rpm higher w/each cam change.

12-300-4 - HIGH Energy
240H cam w/2bbl: 222 hp @ 4000 rpm/363 tq @ 2000 rpm
240H cam w/4bbl: +26 hp/+9 tq @ 2500 rpm; Avg. power +13 tq/+15 hp

12-305-2 - PURE Energy
246PE cam w/2bbl: 225 hp/356 tq
246PE cam w/4bbl:+30 hp/+14 tq @ 3000 rpm; Avg. power +13 hp/+17 tq

12-207-2 - DUAL Energy
255DEH cam w/2bbl: 231/348
255DEH cam w/4bbl:+30 hp/+21 tq @ 3500 rpm; Avg. power +8 hp/+10 tq

Last edited by cobalt327; 01-18-2013 at 06:43 PM.
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