Are new Mushroom lifters flat or convex ?  Work with some of these high tec  coatings , wondering could this be another upgrade ? 

Po ol Davie

Sparta , Tn.

The tappet faces are convex, not flat.

Lorena, Texas (South of Waco)

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 . 
 

Po ol Davie

Sparta , Tn.

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

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.

  

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. 

Do you know what radius they are Ted?


South Australia

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.

Should be 50-52”radius.

Lorena, Texas (South of Waco)

Thank you Ted. 


South Australia