M&W AP-46 oops

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Here is what happens when you use a 45 crank with the WD pistons.  You end up with a great model to use for fly cutting pistons!!

This was my fault due to not paying attention when assembling.  I actually pulled it like this for a summer and when I changed oil the one day a piece of metal came out hole.  Pulled pan and found the metal around wrist pin broke and barely hanging on

	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

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Larry(OH) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Shreve Ohio Points: 1576	Post Options Post Reply Quote Larry(OH) Report Post Thanks(0) Quote Reply Topic: M&W AP-46 oops Posted: 14 Dec 2010 at 6:59pm
	Here is what happens when you use a 45 crank with the WD pistons. You end up with a great model to use for fly cutting pistons!! This was my fault due to not paying attention when assembling. I actually pulled it like this for a summer and when I changed oil the one day a piece of metal came out hole. Pulled pan and found the metal around wrist pin broke and barely hanging on
	'40 WC puller,'50 WD puller,'50 M puller '65 770 Ollie ALLIS EXPRESS contact I can explain it to you, BUT I cannot understand it for you!!

Sponsored Links

wi50 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 24 Sep 2010 Location: weegieland Points: 1010	Post Options Post Reply Quote wi50 Report Post Thanks(0) Quote Reply Posted: 14 Dec 2010 at 8:00pm
	I bet the comperssion is pretty high, I've got some M&W pistons here from a WD and I measured things up, should be around 13.5 to 1, or maybe slightly better. I'm suprised that it didn't hit the head. Tomorrow when I go to the shop, I'll measure the compression height of the pistons, 2.935 sticks in my mind for the M&W for a WD but I don't rember for sure. WIth a 12.655 deck, 7.5" rod and a 2.25 crank offset the piston would come .030 out of the block, add about .045 or so for a compressed head gasket and I figured they would hit the head or at least hit with a few RPM but maybe not. I've got the same setup laying on the shelf to swap into one, but I was going to put the pistons in the lathe and trim a bit out of the bowl, cut valve reliefs and re check height to build a complete quench engine, figureing I'd give it .030 quench.

mlpankey Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Sep 2009 Location: Vols country Points: 4580	Post Options Post Reply Quote mlpankey Report Post Thanks(0) Quote Reply Posted: 14 Dec 2010 at 9:39pm
	well larry you know exactly where to cut them. Wi 50 theys alot of hype on quench . I think its useful on high rpm engines to kill detonation by creating swirl . i just dont think its that big of a magic trick on a chug chug tractor rpm . Tractor that has a wedge design combustion chamber in the head and has pushed compression ratio to the limit for the fuel all the spark advance it wil take and make 7 grand on the tac during runs then i will say quench has some hocus pocus . Edited by mlpankey - 14 Dec 2010 at 9:43pm