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


wd and d17 iv pistons

 Post Reply Post Reply
Author
Message
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3304
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Topic: wd and d17 iv pistons
    Posted: 15 Feb 2024 at 6:58pm
i have scored a d17 series 4 engine for my wc puller project has any one measured the pin hieght on the wd piston and the d17 piston ? can the wd pistons be milled down to make 12:1  wondrering about useing reliance wd cylinder kit 470283616  if i read it correctly that part number is a flat top 4 1/8 piston
Back to Top
Sponsored Links


Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3304
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2024 at 9:25am
any one know what or whos brand , pistons i need for 4 1/8 bore  d17 rods , crank to make 12:1 compression
Back to Top
IBWD MIke View Drop Down
Orange Level
Orange Level
Avatar

Joined: 08 Apr 2012
Location: Newton Ia.
Points: 3485
Post Options Post Options   Thanks (0) Thanks(0)   Quote IBWD MIke Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2024 at 8:07am
Originally posted by HudCo HudCo wrote:

any one know what or whos brand , pistons i need for 4 1/8 bore  d17 rods , crank to make 12:1 compression

Hud, I've got a set of 4&1/8" WD flat-tops that might work for you. We've discussed this in the past but not sure what compression ratio people thought they would make with a 45 crank.
Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3304
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2024 at 9:55am
any chance you can measure the center of the pin to the top
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19609
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2024 at 6:30pm
2.550" flat tops 4 1/8" makes 11.3 to 1 as I've outlined in the above "D-17 piston" post. So, more than that like 2.600" flat top 4 1/8" would be close or more than 12.0 to 1.

Edited by DrAllis - 17 Feb 2024 at 6:32pm
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19609
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2024 at 6:33pm
BTT
Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3304
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2024 at 10:21pm
over looked that post ,     but i did measure  the part number 229717 4 inch pistons that i removed out of it ,   couldnt find that part number in the agco parts book listed for series iv  . i got 2.835 pin hieght and .352 from the top of the deck to the  top of piston  not bowl at tdc , did not measure the volume of the bowl .   reliance dosnt say what compression ratio their 4 1/8 wd flat top is      so their sould be plenty of room for the valves to open and close    it would be nice to have a dished or a bowl piston  with that flat head  hope i aint missing somthing
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19609
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2024 at 12:51am
Knowledge Base info: "Compression calculators for 226 engines" near bottom of the page. My own personal notes have a 170 (8.0 to 1) power crater piston at a .263" to .265" deck clearance at TDC. The 175 (8.25 to 1 ) power crater piston has a deck clearance of .230" to .235". This is measured to the highest part of the piston at the piston pin centerline. A D-17 piston ( 7.25 to 1) should measure about .368" to .370" deck distance. So, WD 4 1/8" flat tops need to measure a deck distance of .263" to .265" or less to be more than 11.3 to 1. Probably more like .230" to .235" for 12 to 1.

Edited by DrAllis - 18 Feb 2024 at 11:39am
Back to Top
IBWD MIke View Drop Down
Orange Level
Orange Level
Avatar

Joined: 08 Apr 2012
Location: Newton Ia.
Points: 3485
Post Options Post Options   Thanks (0) Thanks(0)   Quote IBWD MIke Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2024 at 6:02am
My flat-tops measure 2.375 c/l of pin to top.
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19609
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2024 at 11:41am
BTT
Back to Top
steve fischer View Drop Down
Orange Level
Orange Level


Joined: 11 Jul 2011
Location: sleepy eye mn
Points: 929
Post Options Post Options   Thanks (0) Thanks(0)   Quote steve fischer Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2024 at 11:41am
food for thought ,I don't like a flat top piston for a 226 they don't have the bark , I have gone back to cupped pistons for a burn chamber(power crater)
Sealed power number 1728 is a 201 cupped 4 1/8 piston, fit right in ,hard to find,
m&w ap46 also fits may have to cut top off ,I think I have some used left 
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19609
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2024 at 11:49am
SP-46's I used to remove .170" off the tops and had 240+ psi cranking compression, Always called it 11 to 1 or a little better. I like the bowls too.

Edited by DrAllis - 18 Feb 2024 at 11:49am
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 0.047 seconds.


Help Support the
Unofficial Allis Forum