Quote:
Originally Posted by racing97
Yes I built one with a 3.2 case 76.4 X 98 with a 22 pin and a 130 ti rod from a Cup Car, CP piston with
1.113" piston compression height and a 106 L/C cam. The Cam is important to keep the top center timing out of the pockets.
Here is how you do it
1. find the deck of your case
2. length of rod
3. 1/2 stroke
4. length of barrel
5. figure 1 mm of deck clearance so subtract that
6. the remaining dimension is going to be piston compression height which is center line of piston pin to piston periphery.
7. give the dimension to CP contact Jerry Roche he will reassure youand he knows what to do.
Regards
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Given what you've shown in calculations I've assumed you were able to assemble this build without need of custom spacers for the cylinders and chain boxes to accomodate the stroke...
I really like that you used a 130mm rod for this build. For this rod length (etc...) your build required a piston pin compression height of 1.113" (28.27mm). Did this Compression height require the wrist pin bore to be so high as it encroaches into the oil ring groove on the piston?
If so, do you just use oil ring support rails and move on, and/or any concerns using the support rails on our engines?