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 > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


426 compression ratio
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
8070nc View Drop Down
Orange Level Access
Orange Level Access


Joined: 21 Mar 2019
Location: North Carolina
Points: 682 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 8070nc Quote  Post ReplyReply Direct Link To This Post Topic: 426 compression ratio
    Posted: 7 hours 33 minutes ago at 9:55am
This is a mental experiment and i should probally quit thinking so much. I have a DTA 466 with a p pump in a medium truck. It will start in 20 degree weather like its summer. Its my understanding that those engines are 17to one compression. Would it be possible to have a set of pistons made for a 426 allis to raise the compression and what problems could that solve ir create
1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
Back to Top
Sponsored Links


Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 22437 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 25 minutes ago at 11:03am
I'm sure you could have custom pistons made with a few less cc's in the bowl, raising the compression to improve cold starting. Higher compression ratios are harder on the crankshaft, conn rods and all bearings.  If you took two identical engines (except 16 to 1 and 17 to 1) and loaded them at 100% load until something failed, the 16 to 1 will run more hrs. it's a compromise. To get one thing, you might have to give up something else.  DT-400 series have larger diameter mains and rods bearings.  M & W piston kits from years ago did start as good as an IH and some on here can attest to that. Don't think you can buy them anymore.
Back to Top
NEVER green View Drop Down
Orange Level Access
Orange Level Access


Joined: 28 Feb 2013
Location: MN.
Points: 9042 		Post Options Post Options   Thanks (0) Thanks(0)   Quote NEVER green Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 53 minutes ago at 3:35pm
   Throw in some total seal gapless second rings and bam!!
2-8050 1-7080 6080 D-19 modelE & A 7040   R50       
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 0.137 seconds.


Help Support the
Unofficial Allis Forum