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Message: [QUOTE="CATDiezel, post: 1099230, member: 4387"] Hmm. Interesting. A lbz duramax is flat out of fuel at 500 hp just like the 6.7l. I know not apples to apples but the lbz was using a cp3. I'm not educated near enough on the CP's to know... just asking. The interesting part is the "STROKER" kit is a factory 10mm Bosch part. I guess in my little brain I expected 2 pumps in the cp4.2 to flow more than the 1 pump in the cp3. Even with a 10mm adder kit with ported internals. The cp3 couldn't make the pressure supposedly because of the long duration of the stroke. And that was my understanding they went with a 2 piston shorter stroke cp4 to keep the pressure up and the pulsation at a minimum. Don't take anything I've got to say on this as any form of gospel. The guys doing all the professional modding on them definitely know more. [/QUOTE]

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