This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Other Topics > Pulling Forum
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


Roller rockers question
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
brbrooks83 View Drop Down
Silver Level
Silver Level


Joined: 17 Sep 2011
Location: Strawberry Plai
Points: 144 		Post Options Post Options   Thanks (0) Thanks(0)   Quote brbrooks83 Quote  Post ReplyReply Direct Link To This Post Topic: Roller rockers question
    Posted: 11 Aug 2013 at 10:26am
I bought a Allis wd setup for pulling the owner said it had some head work but haven't had it apart. The tractor is strong and we did good with it the first time out wondering if roller rockers would make a big difference or would it be a waste of 400 bucks? Is anybody running them?
Back to Top
Sponsored Links


Back to Top
Dnoym N. S. Can. View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 03 Oct 2009
Points: 544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dnoym N. S. Can. Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2013 at 12:16pm
 it be a waste of 400 bucks
B:-)      Dnoym
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 20697 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2013 at 7:48pm
If they are the same rocker-ratio and you're only running 2000 rpm, I wouldn't spend my money on them.  If they provide more valve lift because of a different ratio, then that might exclude regrinding the camshaft.
Back to Top
jpankey View Drop Down
Silver Level
Silver Level


Joined: 12 Sep 2009
Points: 64 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jpankey Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 2013 at 4:53pm

Billy Godbold of compcams says that every 1/2 point rocker ratio change makes the cam act like it has 2 degrees more tappet duration at .050. Every full point is like 3 degrees .If you keep the same rocker lash and dont increase it when increasing rocker ratio. So 1.5 to 1.85 be  3x3=9 +2= about  11 degrees in tappet duration change plus the additional lift which a engine is at 33 percent of the time couldnt do anything but help in performance not to  mention the additional air under the curve at all valve lift measurements. Murphy has a chart that you can click on to aid in visual interpetation if needed.

Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.063 seconds.


Help Support the
Unofficial Allis Forum