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Old 08-29-2018, 04:24 PM   #1
BluegrassDiesel
 
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Factory Cummins Cam specs

Does anyone have detailed cam specs for a factory 6.7 cam?
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Old 08-30-2018, 08:57 AM   #2
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Quote:
Originally Posted by BluegrassDiesel View Post
Does anyone have detailed cam specs for a factory 6.7 cam?
Specs on a stock 6.7 cam are the same as the 03+ CR 5.9.
Intake; 163* @ 0.050”
Exhaust; 191* @ 0.050”
Intake lobe lift; 0.237”
Exhaust lobe lift; 0.299”
LSA; 98.5*
 
Old 08-30-2018, 11:04 AM   #3
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03+ ?
What about the in cylinder egr exhaust overlap ? IIRC, that did not exist on the 03-04 engines ?
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Old 08-30-2018, 12:53 PM   #4
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^^ That was always my thought as well. The 04.5+ 325 engines have a different cam profile.
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Old 08-30-2018, 01:04 PM   #5
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I thought it was 109° on all CR applications.

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Old 08-30-2018, 01:12 PM   #6
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Yeah I saw specs that said all CR were the same but I thought there were 3 different CR cams
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Old 08-30-2018, 01:47 PM   #7
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It's the only reason I used my early 04 Federal cam in my new 6.4 build. If it was a later cam, I'd have scraped it.
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Old 08-30-2018, 03:46 PM   #8
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My understanding was that the lift, duration, and lsa are the same on all the cr cams, but that the ramp profile can be/is different. Also on the 6.7 cam the lobe is wider.
I could be wrong so....
 
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