Did I Undercarb my 489?
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Did I Undercarb my 489?
Fresh 489, Cam from Bob at Marine Kinetics, 595 lift, 188 heads, 9.5:1 pistons, all forged bottom end,454 mag gm intake...23p mirage prop on a 5000lb Chap 2550 sx. Got a Holley 750 dp. Should I have gone 800 or 850? Great out of the hole, no trim tabs necessary, top end not there. Will try a 20p turbo prop tonight to see if that gives me some lift to get the rpms up.
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Fresh 489, Cam from Bob at Marine Kinetics, 595 lift, 188 heads, 9.5:1 pistons, all forged bottom end,454 mag gm intake...23p mirage prop on a 5000lb Chap 2550 sx. Got a Holley 750 dp. Should I have gone 800 or 850? Great out of the hole, no trim tabs necessary, top end not there. Will try a 20p turbo prop tonight to see if that gives me some lift to get the rpms up.
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I agree with the others, call Bob!
Bob is currently building my cam and has helped me design 80% of my engine. You bought your cam from the right guy give him a call and he'll help you out! I was planning on running a 750 carb on my 440 bbc and Bob said, "no, thats a small block carb" From what I was told in that conversation, my guess is you need to step up your carb at least. I am going with a pro-systems carb, which I'm guessing will be around 850 cfms.
Bob is currently building my cam and has helped me design 80% of my engine. You bought your cam from the right guy give him a call and he'll help you out! I was planning on running a 750 carb on my 440 bbc and Bob said, "no, thats a small block carb" From what I was told in that conversation, my guess is you need to step up your carb at least. I am going with a pro-systems carb, which I'm guessing will be around 850 cfms.
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