Quote:
Originally Posted by Steve C.
As an example and for interest here, this is very nice street build that made 650 hp with 535 cubic inches using 345 cfm Edelbrock heads with 2.250 intake valves. The cam here was a relatively mild 248 degree hydraulic roller... knowing that going to a solid roller cam you will need to add additional duration.
As in the case of this build in all likelihood the height of your intake ports on the proposed 340 cfm cylinder heads will require modifications to the Torker II intake manifold as done here. It will need TIG-welding for raised port tops in the intake, machined flat and port-matched. Nothing unusual.
https://www.hotrod.com/articles/ccrp...-alloy-indian/
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650-700 hp at above 6500 rpm is one thing, but poster asked for 650-700 at 6000 rpm. Does that combo you listed do that? To me, building for 6000 rpm is an entirely different level that 7000 rpm. Asking for street driveability and pump gas seems to be asking a lot. . On the street, it is going to see a LOT of 2000 rpm to 3000rpm driving. This sounds like a job for a computer controlled engine?!?!?!
I enjoyed driving high compression 13:1 on the street when premium was 110 octane and octane booster was loaded with lead and really worked.
Is there a formula for how many cubic inches you need to get 700hp with 10.5:1 cr at 6000 rpm? Seems like that is the starting point, and you need to work backwards from there. Maybe a turbo, or blower????? May not even need as many cubic inches!!!!
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