Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show


Thread: breakin in the cam...?

Reply To Thread
Results 1 to 4 of 4
  1. #1
    kingkuda440's Avatar
    kingkuda440 is offline CHR Member Visit my Photo Gallery
    Join Date
    Sep 2004
    Car Year, Make, Model: 1969 Plymouth Barracuda

    Question breakin in the cam...?


    i recently put a 340 built and put in my 69 cuda, do I need to run the engine @2000 rpm for 20 min to break in the cam, ive heard that you need to and i hear that you cant...please help. thanks.

  2. #2
    Tiny's Avatar
    Tiny is offline CHR Member Visit my Photo Gallery
    Join Date
    Dec 2004
    Car Year, Make, Model: 71 Chevy Nova & 73 Dart

    I run between 2000 and 2500 for 20 minutes, but I know others that do not break them in. I would advise breaking it in.
    71 Nova 355 TH350 8.5" 4.10s looking for LOW 13s

    73 Dart just getting started

    98 Cummins Ram, rattlin and smokin

    03 Yukon XL house on wheels

  3. #3
    Dano78's Avatar
    Dano78 is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2003
    Car Year, Make, Model: Fords.. All pre-'78

    Definately break it in. Same for me 2200-2500 for 20 min. Just did a 318 cam swap last weekend. Put in SSI's (PAW) version of the factory 340 cam in his 318. I was hoping the cam would be lumpier then it was, but it sure runs out strong.
    Dan Ouellette
    '25 T C-Cab
    '47 Ford Coupe
    '53 Ford Crestline
    '53 Ford Mainline
    -And 8 more Fords and 2 Mopars

  4. #4
    canadianal's Avatar
    canadianal is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2004
    Car Year, Make, Model: 66 ford custom,27 t bucket

    kind of off topic but i did one of those 340 318 cam swaps when i was younger same thing thought it would be a lumpy cam but it ran nice and strong . i then changed the heads to a milled 360 head bigger valves and at least a point in comp , then the little motor really picked up its feet.
    i also do breakins on cams but its not just for the cam after having the engine aparts its good to run it and look for leaks and time it etc.

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink