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

Barry Polley 01-24-2025 10:20 AM
Re: Lifters In Stock Eliminator
 
If bigger diam lifters, bigger cam diam didn't work , SS,comp and Pro Stock would not have lifters over one inch diameter/ huge wheels and 70 plus?s mm cams. It is a performance advantage.

Alan Roehrich 01-24-2025 10:49 AM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Mad Manz (Post 708490)
Thanks for the replies. I think I will staying with the .842 dia lifter. Im just making sure i'm totally legal.
As far as lifters themselves what are the best tool steel solid lifters out there?

Trend.

Rick J 01-24-2025 12:08 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Barry Polley (Post 708500)
If bigger diam lifters, bigger cam diam didn't work , SS,comp and Pro Stock would not have lifters over one inch diameter/ huge wheels and 70 plus?s mm cams. It is a performance advantage.
Yes, and if you can't increase cam core and/or lifter diameter, lofting the valvetrain reduces friction and adds hp, but some prefer keeping the lifter in constant contact with the lobe.

Stan Weiss 01-25-2025 11:06 AM
Re: Lifters In Stock Eliminator
 
6 Attachment(s)
In a thread on another forum they were talking about that many years ago Isky sold "Chilled Iron lifters". If someone today could manufacture these it might solve the problem.


Stan

Alan Roehrich 01-25-2025 12:59 PM
Re: Lifters In Stock Eliminator
 
The Isky chilled iron lifters are not harder than either the tool steel or the Johnson Hy-Lift hardened tappets. The only thing harder is carbide or ceramic.

Stan Weiss 01-25-2025 01:38 PM
Re: Lifters In Stock Eliminator
 
1 Attachment(s)
Quote:
Originally Posted by Alan Roehrich (Post 708544)
The Isky chilled iron lifters are not harder than either the tool steel or the Johnson Hy-Lift hardened tappets. The only thing harder is carbide or ceramic.

Alan,
That was talked about in the pages I posted.


Stan

Mike Taylor 3601 01-25-2025 06:15 PM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Rick J (Post 708428)
Well, oversized lifters are in NHRA Stock Eliminator, just so you know.
How many of those stockers with larger than oem diameter lifters have been through teardown? and passed?

Rick J 01-26-2025 11:14 AM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Mike Taylor 3601 (Post 708549)
How many of those stockers with larger than oem diameter lifters have been through teardown? and passed?
Don't know, I was helping a guy do a freshen up on his combo, got the dial caliper out, told him the lifters were oversized, he said they are fine and to finish the build, so I did and never mentioned it again.

Rick J 01-26-2025 11:21 AM
Re: Lifters In Stock Eliminator
 
I'm of the opinion that the tech department should put the OE lifter diameter rule in writing right now, and give everyone a year to comply, since it is a labor intensive and costly switch.

Terry Cain 01-26-2025 11:47 AM
Re: Lifters In Stock Eliminator
 
Quote:
Originally Posted by Alan Roehrich (Post 708544)
The Isky chilled iron lifters are not harder than either the tool steel or the Johnson Hy-Lift hardened tappets. The only thing harder is carbide or ceramic.
Or Titanium


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