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ChadS
11-07-2005 09:49:32
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Re: ?????? For ChadS or any other stroker engine b in reply to 44 massey, 11-06-2005 14:32:40
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Are you talking 1/2 total, (.250 crank offset on the journal) or a full 1 inch stroker (.500 off set on the journal)? Im not much on Massey 44's, so I will ask a few questions,,,, First is the engine dry sleeved? If so, lets talk about a stock bore stroker for the .250 (1/2 total) stroker. All you would have to do is machine off .125 off the top of the pistons to match the compression height for the stroke, use the stock rods and do a little grinding to make it swing in the block. You should not have to do much grinding to make that swing in the crankcase. So, you could get away with using stock pistons, or an overbore piston if available,,, and not have too much to worry about for assembly. Now lets say your talking about the full 1 inch stroker,,, which would be a .500 offset on the rod journal. What this does is moves the piston upwards .500 in the bore, and another .500 down in the bore to get a total of 1 inch more stroke. So, you have to lose .500 on the compression height of the piston to make the height match the stroke. Id be almost certain you could machine off .250 off the top of the piston if it is a pretty thick headed piston, Id have to see one to know for sure if that much can be removed. Now if .250 cannot be taken off, look into pistons with the same bore as the 44, but has a smaller diameter wrist pin. Then you could offset the wrist pin bushing some, or all of the .250 you have to get rid of. You could maybe offset the bushing .125, then cut off .125 off the piston head and get your compression height you need to do what you want to do. Hope this makes sence,,,, when you see what the math adds up to, to compensate for the increased displacement, and keep the stock bore and possibly the stock pistons to keep the cost down on buying custom made pistons, or a mismatch set. if I had a 44 piston, I could tell you if .250 can be safely for the 1/2 total stroker. On the 1 inch stroker total, (.500 offset),, depending on what the wrist pin diamter is on the 44,,, you may be able to use a 4-1/8th bore IH 450 piston which has a 1 inch pin, or close to it, you can remove some material off the piston head, and offset the bushing .250 down on the rod to pick up the .500 difference. The 44 rod has to have a bigger wrist pin to do this,,, otherwise your looking for pistons that have a 1/2 shorter compression height. ChadS
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