Lifters In Stock Eliminator

[Terry Cain]

Originally Posted by GUMP

I have a friend that I believe builds pretty good stuff post photos on Facebook of worn out flat tappet lifters and cam lobes that he encountered during break-in. I have read a lot about this of late. Is it really time to allow rollers for all combinations in stock due to inferior parts? Or, are the cams victim to other factors related to the valve spring and solid lifter rule changes?

To be clear, I have no current dog in this hunt. Everything that I own and am currently working on uses rollers.

OH NO, we wouldn't want to change an obsolete rule, would we? OH, don't worry about me. I wouldn't run another flat motor if it was rated at 1/2 hp.

[Stan Weiss]

I don't have a dog in this fight. But it is just the results of NHRA not following their rules and then allowing rules change after rules change. If back in the beginning they had done like the SCCA you wouldn't have all of these problems.


Stan


PS I know it has been going on for a very long time. 50 years ago we were running a Lunati stocker cam in a '67 Z28.


The Chevy 3030 data is from a Cam Dr the Lunati data is from me with a degree wheel and dial indicator on a used cam.

[Gary Smith]

Anyone use Hylift Johnson (Topline)? We sell them under the Erson brand, used on cams with springs @ 120 seat / 300# over the nose and haven't heard of any failures (knock on wood). Precision Products is probably the best, but I would think HJ Toplines are decent for less money.

[Mad Manz]

Sorry in advance but I am new to the stocker stuff.
AS for lifters in Chevy's 396/325hp to be exact the rule book says you can install lifter bore bushings.
My question is when I do this can I put the .904dia lifters in or do I have to stay with the GM .842 dia lifter

[Mike Taylor 3601]

Originally Posted by Mad Manz

Sorry in advance but I am new to the stocker stuff.
AS for lifters in Chevy's 396/325hp to be exact the rule book says you can install lifter bore bushings.
My question is when I do this can I put the .904dia lifters in or do I have to stay with the GM .842 dia lifter

Have to stay .842

[Rick J]

Originally Posted by Mike Taylor 3601

Have to stay .842

Where does it say that in the rulebook?

[MR DERBY CITY]

Originally Posted by Rick J

Where does it say that in the rulebook?

It is not in the rule book, it is in the UNWRITTEN rule book. Mike Taylor is correct. If you know…..you know.

[1320racer]

Unwritten rules ain?t rules!

[Rick J]

Originally Posted by MR DERBY CITY

It is not in the rule book, it is in the UNWRITTEN rule book. Mike Taylor is correct. If you know?..you know.

Well, oversized lifters are in NHRA Stock Eliminator, just so you know.

[Alan Roehrich]

Originally Posted by Mad Manz

Sorry in advance but I am new to the stocker stuff.
AS for lifters in Chevy's 396/325hp to be exact the rule book says you can install lifter bore bushings.
My question is when I do this can I put the .904dia lifters in or do I have to stay with the GM .842 dia lifter

You can. But if you get torn down, you're getting a DQ, and probably a fine, as well as some time off.


I was actually just discussing this yesterday, with a very high ranking NHRA tech person.


In Stock Eliminator, the OE lifter diameter MUST be retained.