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By mongo - Last Month
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Are new Mushroom lifters flat or convex ? Work with some of these high tec coatings , wondering could this be another upgrade ?
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By Ted - Last Month
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The tappet faces are convex, not flat.
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By mongo - Last Month
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Perfect Ted,
I knew you would know ! Have you tried any of the lifter coatings , as I see on NASCAR valve train parts . Most cams are not coated , any of the newer solid lifters , after periods of high rpms , show no wear at all either . Next time in Mooresville ,NC , I may take set , and have coated .
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By Litshoot - Last Month
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Mongo are you talking about dlc type coatings, or additive like cerakote slick coatings. went to school in mooresville and missed access to a lot of cool tricks now that i actually am able to afford some of them. i had a classmate most of a carbon fiber go cart at the shop he worked at.
Seth
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By oldcarmark - Last Month
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The Reason they are convex is so they will rotate on Cam Lobe as the Engine is running. No rotation will wear out Lifters in very quick order.
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By 55blacktie - Last Month
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mongo (4/13/2026)
Are new Mushroom lifters flat or convex ? Work with some of these high tec coatings , wondering could this be another upgrade ?
The Topline Hylift Johnson Y-block lifters, which are sold by Isky, Clay Smith, etc., and can be purchased directly from Topline, have a temporary protective coating that prevents accelerated wear during break-in.
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By slick56 - Last Month
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Do you know what radius they are Ted?
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By Cliff - Last Month
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The only lifters that do not wear are Trend Tool Steel lifters, however they are not made any more. I bought all that they had left.
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By Ted - Last Month
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slick56 (4/22/2026)
Do you know what radius they are Ted?
Should be 50-52”radius.
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By slick56 - Last Month
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Thank you Ted.
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By 55blacktie - Last Month
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Cliff (4/22/2026)
The only lifters that do not wear are Trend Tool Steel lifters, however they are not made any more. I bought all that they had left.
If the Trend lifters don't wear, they must be harder than the cast, flat-tappet-cam lobes. With that being the case, I would think that they must cause accelerated wear of the lobes.
Dan Jessup wanted to buy Trend lifters so that he could swap cams without having to replace the lifters. I never heard back from him to confirm that he was able to get the Trend lifters before they were gone.
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By slick56 - Last Month
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I assume the lifters can be reground to that radius? Do you know if they are hard all the way through, or case hardened? They are from a C2AE block.
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