Previous Thread
Next Thread
Print Thread
1971 camshaft pn 3671-475 info? #3092546
11/08/22 11:41 AM
11/08/22 11:41 AM
Joined: Feb 2021
Posts: 131
PINE VALLEY
Ray S Offline OP
member
Ray S  Offline OP
member

Joined: Feb 2021
Posts: 131
PINE VALLEY
My 71 413-1 has a pn 3671-475 (RV/truck) cam, and I can't find any info on it, anywhere, at all.
Does anyone have open-close specs for it?

Someone posted these
https://www.bigblockmopar.nl/tech/chrysler-corporation-valve-action-timing
http://victorylibrary.com/mopar/mpcam-tech-c.htm

but sadly no 413s at all.

Re: 1971 camshaft pn 3671-475 info? [Re: Ray S] #3092573
11/08/22 01:04 PM
11/08/22 01:04 PM
Joined: Mar 2010
Posts: 989
Atlanta, GA
M
mgoblue9798 Offline
super stock
mgoblue9798  Offline
super stock
M

Joined: Mar 2010
Posts: 989
Atlanta, GA
Ray, if you are looking for a cam for your engine talk to Mike Jones. He has an RV grind specifically for big block mopar motorhomes.

If I recall correctly seems I read somewhere that the 413 cam was about .190 @ .50 duration and 390 lift w/ 1.5 rockers. It was smaller than even the stock base model 440's.

I can't find or recall where I might have read it though.

Re: 1971 camshaft pn 3671-475 info? [Re: mgoblue9798] #3092596
11/08/22 02:43 PM
11/08/22 02:43 PM
Joined: Feb 2021
Posts: 131
PINE VALLEY
Ray S Offline OP
member
Ray S  Offline OP
member

Joined: Feb 2021
Posts: 131
PINE VALLEY
Thanks - even the 440 specs I've found are probably for cars, not the RVs, like "CHRYSLER CORPORATION VALVE ACTION & TIMING 1970 - 1976"
I might re-cam one day but not soon, I'd like to know what they come with to start...

FWIW I did just find these RV cam threads:
https://www.forbbodiesonly.com/moparforum/threads/440-rv-cam-specs.163412/post-911549616
"stock mh cam was the same as the non hp cam basically 68 to end of production"

https://www.forbbodiesonly.com/moparforum/threads/72-rv-413-engine-questions.128425/#post-910646662
"My 413 had the stock 2.08/1.74 valves that came in the 915 head"

I have the FSM and parts books, but they don't provide specs







Powered by UBB.threads™ PHP Forum Software 7.7.1