Building a new motor, Best Piston Rings and Lifters? |
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Building a new motor, Best Piston Rings and Lifters? |
RoadGlue |
Jul 18 2014, 10:42 AM
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#1
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Sonoma County Gear Head Group: Admin Posts: 2,033 Joined: 8-January 03 From: Santa Rosa, CA Member No.: 108 Region Association: Northern California |
Hey all,
Building a fairly mild 66 mm x 96 mm short stroke motor (heads opened up a bit, mild cam). Just looking for recommendations for rings unless whatever AA P&Cs come with are considered good enough. Also looking for good lifter recommendations too. Not going hydraulic. Thanks! Randy |
'73-914kid |
Jul 18 2014, 12:08 PM
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#2
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Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California |
Cam Lobe/Lifter face hardness compatibility, and the issue I had with the push-rod cup are two independent problems that aren't related. Sorry, I should have been more specific on that. Lobe/Lifter compatibility issues will result in a flat cam while the hardness of the lifter body resulted in the issue I described with the pushrod sinking into the lifter.
There is nothing wrong with a reground cam IMO, as long as you are installing cut-to-length pushrods to account for the smaller base circle diameter of the cam lob. The surface hardness on the face of the Mahle lifters was great from what I could tell, just that pushrod cup surface wasn't hard enough. I was running springs with just slightly more spring pressure over the stock type 4 valve springs. By no means enough to cause this kind of failure. I would honestly ask Elgin which lifters they recommend since they were the company that re-ground it. |
RoadGlue |
Jul 18 2014, 12:15 PM
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#3
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Sonoma County Gear Head Group: Admin Posts: 2,033 Joined: 8-January 03 From: Santa Rosa, CA Member No.: 108 Region Association: Northern California |
Cam Lobe/Lifter face hardness compatibility, and the issue I had with the push-rod cup are two independent problems that aren't related. Sorry, I should have been more specific on that. Lobe/Lifter compatibility issues will result in a flat cam while the hardness of the lifter body resulted in the issue I described with the pushrod sinking into the lifter. There is nothing wrong with a reground cam IMO, as long as you are installing cut-to-length pushrods to account for the smaller base circle diameter of the cam lob. The surface hardness on the face of the Mahle lifters was great from what I could tell, just that pushrod cup surface wasn't hard enough. I was running springs with just slightly more spring pressure over the stock type 4 valve springs. By no means enough to cause this kind of failure. I would honestly ask Elgin which lifters they recommend since they were the company that re-ground it. Thanks for the clarification! That makes perfect sense. I think that's a good idea. We'll chat with Elgin. I may still get a new cam from a new blank too! You guys rock. |
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