Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Results 1 to 8 of 8
  1. #1
    Registered
    My Boats:
    looking for a 37 AT...
    Join Date
    Jul 2010
    Location
    Grand Rapids, Mi
    Posts
    1,955

    Biggest cam with CMI E tops

    what's the biggest cam I can run with the factory 500efi CMI's without having reversion problems
    Last edited by Drock78; 08-10-2013 at 06:10 PM.

  2. #2
    Registered
    My Boats:
    OLD SKOOL MUSCLE
    Join Date
    Dec 2010
    Location
    Arizona
    Posts
    108
    Biggest isnt the best, there is a science behind cam selection. Best start by telling us about your entire set up, boat, engine build sheet etc.....

  3. #3
    Registered
    My Boats:
    looking for a 37 AT...
    Join Date
    Jul 2010
    Location
    Grand Rapids, Mi
    Posts
    1,955
    im looking at a going a different route with the engine since i lost a cylinder in mine. I want to still be able to run my headers and my switchable exhaust. looking going back to a carb motor but the motor im looking at is running a large solid lifter cam instead of hyd. and needs to run dry exhaust so I want to change the cam out so i can run my exhaust

  4. #4
    Platinum Member Platinum Member Rookie's Avatar
    My Boats:
    30 Scarab Panther
    Join Date
    Jan 2003
    Location
    Grand Rapids, MI
    Posts
    3,029
    If your still considering the engine I'm thinking about. Valako has a nice Hydraulic Roller Comp grind that would work good with that engine and heads. Lift and duration.
    No matter how pretty she is, there is a guy who is sick of her S#!t

  5. #5
    Registered
    My Boats:
    looking for a 37 AT...
    Join Date
    Jul 2010
    Location
    Grand Rapids, Mi
    Posts
    1,955
    Yes I am Jason. I'll call Jim this week and talk to him. I just want to be able to use my E-tops and switchable exhaust and not have any reversion

  6. #6
    Platinum Member Platinum Member Rookie's Avatar
    My Boats:
    30 Scarab Panther
    Join Date
    Jan 2003
    Location
    Grand Rapids, MI
    Posts
    3,029
    Jim runs a real mild cam on his 780HP 565. 230/236.
    He can spec a cam. With those heads the lift is important.
    I think the same cam he uses would be great in that engine.
    I would run those solid Isky's on his hyd roller like I do. Lash them to 0.006"-0.007" and hold on.
    They were sent out to Isky and rebuilt .
    He can also order the cam for you.

    It was a beautiful weekend out in GH so get at it! It won't last
    No matter how pretty she is, there is a guy who is sick of her S#!t

  7. #7
    Charter Member # 55 Charter Member Griff's Avatar
    My Boats:
    ............................... 32 Active Thunder
    Join Date
    Oct 2000
    Location
    Omaha
    Posts
    13,603
    Cam choice will depend on many other factors. It depends on the cubic inches of the engine and head flow.
    A cam that causes reversion in a 454 won't necessarily revert water in a 502.

  8. #8
    Registered
    Join Date
    Aug 2013
    Posts
    5
    there is a science behind cam selection.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OSO Sponsor
OSO Advertisers


OSO Directory
All times are GMT -5. The time now is 04:12 AM.
Powered by vBulletin® Version 4.2.0
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.