M&W AP-46 oops

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   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

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Larry(OH) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Shreve Ohio Points: 1577	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!!

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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