Factory Cummins Cam specs

BluegrassDiesel

UK2K!

• Aug 29, 2018

• #1

Does anyone have detailed cam specs for a factory 6.7 cam?

 

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bracker8040

New member

• Aug 30, 2018

• #2

BluegrassDiesel said:

Does anyone have detailed cam specs for a factory 6.7 cam?

Click to expand...

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*

 

QMFB

Fastest Welder in Texas

• Aug 30, 2018

• #3

03+ ?
What about the in cylinder egr exhaust overlap ? IIRC, that did not exist on the 03-04 engines ?

 

Red Sleeper

Active member

• Aug 30, 2018

• #4

^^ That was always my thought as well. The 04.5+ 325 engines have a different cam profile.

 

biggy238

Active member

• Aug 30, 2018

• #5

I thought it was 109° on all CR applications.

Sent from my XT1575 using Tapatalk

 

BluegrassDiesel

UK2K!

• Aug 30, 2018

• #6

Yeah I saw specs that said all CR were the same but I thought there were 3 different CR cams

 

QMFB

Fastest Welder in Texas

• Aug 30, 2018

• #7

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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bracker8040

New member

• Aug 30, 2018

• #8

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....