Power gains from head and cam swap
01-13-2017, 02:25 PM
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Power gains from head and cam swap Hi fellas, just curious what kinda HP increase I can see going from home ported 806 heads and 223/227 cam to fully CNC ported/up sized valves (WCCH Or TEA) and a bigger aggressive cam? Bottom end is rebuilt ls1. Flat top Pistons with valve reliefs. Car made 400whp thru stalled auto. Guessing I'm around 10.5 to 1 compression now and would mill heads to increase that. thanks!
01-13-2017, 03:59 PM
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You guys are right! Little more info would help. I don't have flow numbers on current 806 heads
If I remember correctly the combustion chambers were between 63-65cc. They were "polished". Engine builder said the heads were worth around 20hp. Intake ports were hand ported but nothing special. No exhaust side work. New 243 heads would probably be like a TEA Stage 2 229cc head.
I don't have a cam picked out yet but thinking high 230's intake duration low 240's exhaust.
If I remember correctly the combustion chambers were between 63-65cc. They were "polished". Engine builder said the heads were worth around 20hp. Intake ports were hand ported but nothing special. No exhaust side work. New 243 heads would probably be like a TEA Stage 2 229cc head.
I don't have a cam picked out yet but thinking high 230's intake duration low 240's exhaust.
Last edited by sillysspeed; 01-13-2017 at 04:26 PM.
01-13-2017, 04:31 PM
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Intake manifold is a ported Fast 102 and 4" intake tube/ram air. Exhaust is 1 7/8 headers to 3.5 y-pipe to high flow 3.5 muffler dumped b4 rear. It does pretty good. Tune will be aggressive
