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-   -   Lifters In Stock Eliminator (https://classracer.com/classforum/showthread.php?t=88841)

Terry Cain 01-14-2025 12:15 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by GUMP (Post 707685)
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 01-14-2025 12:39 PM
Re: Lifters In Stock Eliminator
 
3 Attachment(s)
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 01-14-2025 03:09 PM
Re: Lifters In Stock Eliminator
 
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 01-23-2025 09:10 AM
Re: Lifters In Stock Eliminator
 
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 01-23-2025 09:43 AM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Mad Manz (Post 708402)
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 01-23-2025 10:02 AM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Mike Taylor 3601 (Post 708404)
Have to stay .842
Where does it say that in the rulebook?

MR DERBY CITY 01-23-2025 12:00 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Rick J (Post 708407)
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 01-23-2025 12:15 PM
Re: Lifters In Stock Eliminator
 
Unwritten rules ain?t rules!

Rick J 01-23-2025 01:02 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by MR DERBY CITY (Post 708423)
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 01-23-2025 01:03 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Mad Manz (Post 708402)
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.


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