Quote:
Originally Posted by SuperStock172
Hi all
Looking for advice on solid flat tappet lifters for a maximum effort sbc 311" with factory cast iron heads restricted to a maximum tappet diameter of 0.904" and mushroom tappets are not allowed as per class rules (Australian Superstock). Whilst we have used Schubek/Smith lifters in the past with one failure (what a mess) were looking at going a different way. Given the rpm (8500-9500) and the aggressiveness of a newer style camshaft we are running (Cup style cam) we are looking to get some recommendations on lifters. I have read in some older forums that racers have had good results with DLC tool steel lifters. So i would just like to get some feedback and past experience with these and if they require any special break in or oil to be run with them. The cam shaft is a steel core 55mm cam with all the latest surface treatments for increasing surface hardness. Any input would be highly appreciated.
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Schubecks have a history of catastrophic failures for many.
Your choices are NASCAR Nextel Tool Steel lifters with the DLC coating made by Trend, PPPC and Ferrea.
The PPPC tool steel lifter can be sent back to PPPC for resurfacing later on.
For your application, make sure to get a lifter for an AMC application since they have the proper pushrod oiling for a Chevy engine. Both Trend and PPPC make the oiling modification. Ferrea already has a modified lifter under P/N LF1004.
http://trendperform.com/b-94213-1149...rformance.html
https://www.pppcenter.com/06Catpgs/C5.pdf