Quote:
Originally Posted by J_PEPIN87
I'm currently putting together a 427 big block for my '74 and would like to know how much hp yall think it will make?the specs are these.
454 block bored 30 over with 427 internals.
Gm crank and rods(stock stroke)
trw dome top pistons part#l2239nf-30
comp cams magnum 292 cam
049 heads with 2.19/1.88 valves no port work
comp cams magnum roller rockers
holley dominator intake
i plan on using a 850 dp carb?
Comp ratio not sure but i think it should be @ 10.5 to 11.the heads were milled a little but not sure how much,the block was also decked but not sure either i know it wasn't zero decked though.i know its hard to guess with out comp ratio but i would just like opinions from yall and wat yall think about the combo thanks a lot.
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Wow, I was just about to post the same question for my motor! We have a similar setup. I wonder if my heads will make much difference in the HP numbers.
Here's mine:
454 .030 over with stock crank and rods
Speed-Pro Pistons
Comp Cam 292H (.550 lift 244 @ .050 on intake and exhaust)
Edelbrock Performer RPM Marine Heads (2.25 int 1.89 ex, 110cc chambers, 290cc flow)
Edelbrock Performer RPM Air Gap Intake - Nascar edition
Comp Aluminum full roller rocker 1.7
850 Carb - considering Mighty Demon
Not sure on deck height but it's not zero. Compression ratio with these heads and pistions is 10:2 on paper.
Any guess on what this will make??