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-   -   Lifter rule in Stock (https://classracer.com/classforum/showthread.php?t=64545)

Alan Nyhus 12-08-2016 10:39 AM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by Grey Ghost (Post 521855)
Here we go. Why do the hyd cam combos get an "up grade" and not the solid cam combinations?? IF ( I am not advocating for this) everyone had been up graded to rollers would that not have leveled the playing field? Am I missing something here? Are not the lifter concerns "wiping out a motor" shared with solid and hyd cams?
Hi Phil.

In a way, a hydraulic cam switched to solids actually loses lift when checked the NHRA way. Since the NHRA checking clearance is .000 (zero), a solid cam loses the lift from the lash when it's running.

A hydraulic lifter is theoretically always at .000 (zero) when it's running.

Kenny Wigington 12-08-2016 10:44 AM
Re: Lifter rule in Stock
 
So in a sense, all the folks using a hyd lifter, as they were supposed to, can change to solid lifter grind, at the same specs, and gain, what maybe 25 to 30 hp ? Is that idea still correct ?


Im only out of class racing, for a little while...

Coleydog 12-08-2016 10:45 AM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by Grey Ghost (Post 521855)
Here we go. Why do the hyd cam combos get an "up grade" and not the solid cam combinations?? IF ( I am not advocating for this) everyone had been up graded to rollers would that not have leveled the playing field? Am I missing something here? Are not the lifter concerns "wiping out a motor" shared with solid and hyd cams?
Seems like a lot of concern about someone getting an edge by using solids making them faster. If they run heads up, maybe, other than that it's a bracket race. Take away the heads up, run on your number, problem solved with Daddy WarBucks mega dollar engine getting a free ride.

Grey Ghost 12-08-2016 10:59 AM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by Alan Nyhus (Post 521858)
Hi Phil.

In a way, a hydraulic cam switched to solids actually loses lift when checked the NHRA way. Since the NHRA checking clearance is .000 (zero), a solid cam loses the lift from the lash when it's running.

A hydraulic lifter is theoretically always at .000 (zero) when it's running.
Good Morning Al.

I understand that. Why the rule change then? Higher RPM capability?

Alan Nyhus 12-08-2016 11:09 AM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by Grey Ghost (Post 521863)
Good Morning Al.

I understand that. Why the rule change then? Higher RPM capability?
One less thing for Tech to check, would be my guess?

ron mattson 12-08-2016 01:39 PM
Re: Lifter rule in Stock
 
My guess would be for ease of tech, the performance
Will change very little , not gonna turn a 6500
Rpm engine into a 8500 or gain a bunch of power.
I would think at very best .03-.05 the current generation
Of limited travel "hydraulic" lifters are solids already!
Just my .02$$ lol!!!!

pfordamx 12-08-2016 02:18 PM
Re: Lifter rule in Stock
 
Does this mean that Hydrualic rollers can be replaced with Solid Rollers?

ron mattson 12-08-2016 02:24 PM
Re: Lifter rule in Stock
 
Not sure in the roller stuff, but that is where
You would see the largest gain not flat tappets.

Bob Bender 12-08-2016 03:15 PM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by ron mattson (Post 521876)
My guess would be for ease of tech, the performance
Will change very little , not gonna turn a 6500
Rpm engine into a 8500 or gain a bunch of power.
I would think at very best .03-.05 the current generation
Of limited travel "hydraulic" lifters are solids already!
Just my .02$$ lol!!!!

x2

Mike Keener 12-08-2016 03:45 PM
Re: Lifter rule in Stock
 
Quote:
Originally Posted by Grey Ghost (Post 521855)
Here we go. Why do the hyd cam combos get an "up grade" and not the solid cam combinations?? IF ( I am not advocating for this) everyone had been up graded to rollers would that not have leveled the playing field? Am I missing something here? Are not the lifter concerns "wiping out a motor" shared with solid and hyd cams?
Great question!


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