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-   -   Explain to me again, please (https://classracer.com/classforum/showthread.php?t=81249)

SDT1DYI 01-05-2022 11:33 AM
Re: Explain to me again, please
 
Quote:
Originally Posted by Terry Cain (Post 655033)
I would think a rule change would effect "all flattappet motors. Am I wrong to think that?
If for some reason NHRA elected to change this rule, I would say "either or". Some motors may not like rollers, depending on the design of there flat tappet existing cam etc.

Steve Teeter Stk/SS 620

Billy Nees 01-05-2022 12:03 PM
Re: Explain to me again, please
 
Quote:
Originally Posted by Terry Cain (Post 655033)
I would think a rule change would effect "all flattappet motors. Am I wrong to think that?
And that's an awful lot of flat tappet motors. What kind of an effect do you think that change will have on the rest of the motor? What else will need to be changed to take advantage of the ability to use more aggressive cam profiles without breaking a lifter or wiping a cam? Not to mention the higher RPM capability.
What we need is a valve spring rule.

Dwight Southerland 01-05-2022 12:28 PM
Re: Explain to me again, please
 
Quote:
Originally Posted by Billy Nees (Post 655037)
And that's an awful lot of flat tappet motors. What kind of an effect do you think that change will have on the rest of the motor? What else will need to be changed to take advantage of the ability to use more aggressive cam profiles without breaking a lifter or wiping a cam? Not to mention the higher RPM capability.
What we need is a valve spring rule.
Bingo. More separation for Stock and Super Stock.

Barry Polley 01-05-2022 12:36 PM
Re: Explain to me again, please
 
Quickly taking the “Stock” out of stock. Yes there have been major changes. If we want or need all that just move to Superstock?
Every change suggested creates a new set of issues and not just costs. Roller cams / lifters/springs double the cost.
. EFI probably triple the cost.

Grey Ghost 01-05-2022 12:40 PM
Re: Explain to me again, please
 
Why did hydraulic lifter combinations get solids and adjustable rockers? I'm fine with that improvement but it certainly wasn't new technology. My 64 MW was OEM solids.

GUMP 01-05-2022 12:49 PM
Re: Explain to me again, please
 
I must be really dumb running hydraulic lifters, stock rockers, and beehive valve springs on my non-VIN, state of art, factory race cars.......

Frank Castros 01-05-2022 01:39 PM
Re: Explain to me again, please
 
Quote:
Originally Posted by Billy Nees (Post 655037)
And that's an awful lot of flat tappet motors. What kind of an effect do you think that change will have on the rest of the motor? What else will need to be changed to take advantage of the ability to use more aggressive cam profiles without breaking a lifter or wiping a cam? Not to mention the higher RPM capability.
What we need is a valve spring rule.
When the Cam Duration and Valve Spring rules were changed many years ago that created a Domino effect that changed Stock Eliminator forever.

Terry Cain 01-05-2022 02:03 PM
Re: Explain to me again, please
 
Quote:
Originally Posted by GUMP (Post 655045)
I must be really dumb running hydraulic lifters, stock rockers, and beehive valve springs on my non-VIN, state of art, factory race cars.......
What type of Hydraulic lifters?
Hell Daren. Your searching now for ways to slow it down to not get a hit.

Todd Hoven 01-05-2022 02:16 PM
Re: Explain to me again, please
 
What advantage are you looking to get by letting all engines run solid roller lifters? How will this make things better? Tool steel lifters don't cost 2100.00 especially for a Chevrolet. Think people wont buy the best lightweight roller lifter money can buy? Have you ever seen a roller lifter explode? It's not pretty. How long should you run a set before its time to throw it in the garbage before it destroys your engine after failure? Leave the rules alone at this point.

BTW: We don't need another poll on here about rule changes.





Quote:
Originally Posted by Terry Cain (Post 655007)
Why are (some not all) stockers still running flat tappet lifters when a motor with flat tappets ain't been made in 20 years and a set of tool steel lifters is $2100, 4-6 months back order . Guess my old head just don't see the reasoning or the difference between lifters and rockers. .

Terry Cain 01-05-2022 02:57 PM
Re: Explain to me again, please
 
Quote:
Originally Posted by Todd Hoven (Post 655049)
What advantage are you looking to get by letting all engines run solid roller lifters? How will this make things better? Tool steel lifters don't cost 2100.00 especially for a Chevrolet. Think people wont buy the best lightweight roller lifter money can buy? Have you ever seen a roller lifter explode? It's not pretty. How long should you run a set before its time to throw it in the garbage before it destroys your engine after failure? Leave the rules alone at this point.

BTW: We don't need another poll on here about rule changes.
Todd, I know you didn't mean to call me a liar. Got off the phone yesterday with Trend. Was quoted $2100. Call if you still think I'm lying and then you can apologize. . "Advantage" No advantage that I can see except able to get car to track and race instead of sitting waiting who knows how long on parts.


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