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Old 09-23-2006, 03:29 PM
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Harts56
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Default Need to wake up a 440!

Hi all,

Just got a 70 Challenger Convt with a 440! Not original 440 car, started out as 318. Any way looks like the 440 is a 1970, low compression motor with stock cam for a 1974 motor. Car is NOT very peppy. Engine has Edlebrock 750 and Performer manifold, dual exhaust.

I'm thinking heads and a cam would wake up the 440, any thoughts?

What were the combustion chamber sizes in 1970 vs 1974?

From what I've read 1970 compression was about 10.2 vs 1974 compression on 8.2. I have no problem using premium gas as it is only driven to shows and for pleasure.

Thanks for you help!