![]() |
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 |
wd and d17 iv pistons |
Post Reply ![]() |
Author | |
HudCo ![]() Orange Level ![]() ![]() Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3471 |
![]() ![]() ![]() ![]() ![]() 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
|
|
![]() |
|
Sponsored Links | |
![]() |
|
HudCo ![]() Orange Level ![]() ![]() Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3471 |
![]() ![]() ![]() ![]() ![]() |
any one know what or whos brand , pistons i need for 4 1/8 bore d17 rods , crank to make 12:1 compression
|
|
![]() |
|
IBWD MIke ![]() Orange Level ![]() ![]() Joined: 08 Apr 2012 Location: Newton Ia. Points: 3618 |
![]() ![]() ![]() ![]() ![]() |
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.
|
|
![]() |
|
HudCo ![]() Orange Level ![]() ![]() Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3471 |
![]() ![]() ![]() ![]() ![]() |
any chance you can measure the center of the pin to the top
|
|
![]() |
|
DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 20107 |
![]() ![]() ![]() ![]() ![]() |
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 |
|
![]() |
|
DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 20107 |
![]() ![]() ![]() ![]() ![]() |
BTT
|
|
![]() |
|
HudCo ![]() Orange Level ![]() ![]() Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3471 |
![]() ![]() ![]() ![]() ![]() |
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
|
|
![]() |
|
DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 20107 |
![]() ![]() ![]() ![]() ![]() |
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 |
|
![]() |
|
IBWD MIke ![]() Orange Level ![]() ![]() Joined: 08 Apr 2012 Location: Newton Ia. Points: 3618 |
![]() ![]() ![]() ![]() ![]() |
My flat-tops measure 2.375 c/l of pin to top.
|
|
![]() |
|
DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 20107 |
![]() ![]() ![]() ![]() ![]() |
BTT
|
|
![]() |
|
steve fischer ![]() Orange Level ![]() Joined: 11 Jul 2011 Location: sleepy eye mn Points: 967 |
![]() ![]() ![]() ![]() ![]() |
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
|
|
![]() |
|
DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 20107 |
![]() ![]() ![]() ![]() ![]() |
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 |
|
![]() |
Post Reply ![]() |
|
Tweet
|
Forum Jump | Forum Permissions ![]() You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |