Lifter rule in Stock

Alan Nyhus · 12-08-2016, 10:39 AM

Quote:

Originally Posted by Grey Ghost

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

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...

Grey Ghost · 12-08-2016, 10:59 AM

Quote:

Originally Posted by Alan Nyhus

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

Quote:

Originally Posted by Grey Ghost

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

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!!!!

Bob Bender · 12-08-2016, 03:15 PM

Quote:

Originally Posted by ron mattson

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

12-08-2016, 10:44 AM	#2
Kenny Wigington Senior Member Join Date: Sep 2004 Location: Cumming,Ga. USA Posts: 967 Likes: 36 Liked 60 Times in 12 Posts	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... __________________ 2894 STK

12-08-2016, 01:39 PM	#5
ron mattson Member Join Date: Nov 2005 Location: cloquet mn Posts: 468 Likes: 17 Liked 69 Times in 32 Posts	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!!!! __________________ Ron Mattson 5015 STK

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