Lifter rule in Stock - Page 4

ALMACK · 12-07-2016, 08:44 AM

Quote:

Originally Posted by SSDiv6

It would have been so easy to add the above statement to the rule change!
As written, it creates all kinds of conclusions and assumptions by engine builders and racers

I agree with the above. ^^

If that was NHRA's intent then the revision should have come out and stated that hyd. flat tappet lifters can be replaced with solids.

Rick Schilling · 12-07-2016, 09:34 AM

I know this should be obvious, but if your combination already uses hydraulic roller lifters you can convert to solid rollers now?

Billy Nees · 12-07-2016, 09:57 AM

Quote:

Originally Posted by Rick Schilling

I know this should be obvious, but if your combination already uses hydraulic roller lifters you can convert to solid rollers now?

It seems to me that going from a heavy hydraulic roller to a (fairly) light race-type solid roller should do wonders for the RPM potential of a bunch of modern Stockers!

Greg Reimer 7376 · 12-07-2016, 11:57 AM

Seems to me that after a lot of good intelligent questions have surfaced and been discussed, a rule clarification will probably be forthcoming. Yes, Billy, the solid roller lifter comment is a real good probability that RPM's might possibly be affected for good. I know that a mechanical lifter camshaft has clearance ramps included on each end of the lobe configuration to allow for lash, and that the overall lift also compensates for valve train lash. If you tried a set of mechanical lifters on your existent hydraulic cam, what would you use for lash on an initial effort before replacing the cam?We're talking going to a test and tune,not some kind of national event.

Dan Fahey · 12-07-2016, 11:57 AM

Holy Super Stock Batman !!!

Stockers with SOLIDS !

D

ALMACK · 12-07-2016, 12:00 PM

Quote:

Originally Posted by Dan Fahey

Holy Super Stock Batman !!!

Stockers with SOLIDS !

D

One step closer to SS for sure Dan

Bob Don · 12-07-2016, 12:34 PM

A cottage industry of high tech, high dollar stocker hydraulic lifters is made obsolete overnight by the stroke of a pen...

Bill Diehl · 12-07-2016, 01:08 PM

If they are going to clarify the rules...what about the diameter?

jimi · 12-07-2016, 02:16 PM

Quote:

Originally Posted by Greg Reimer 7376

Seems to me that after a lot of good intelligent questions have surfaced and been discussed, a rule clarification will probably be forthcoming. Yes, Billy, the solid roller lifter comment is a real good probability that RPM's might possibly be affected for good. I know that a mechanical lifter camshaft has clearance ramps included on each end of the lobe configuration to allow for lash, and that the overall lift also compensates for valve train lash. If you tried a set of mechanical lifters on your existent hydraulic cam, what would you use for lash on an initial effort before replacing the cam?We're talking going to a test and tune,not some kind of national event.

been using solid lifters on hydraulic cam grinds for years in street cars adjust the lash at.006".

Greg Reimer 7376 · 12-07-2016, 07:26 PM

I assume that would have to be at or near operating temperature. Also, how much would you gain over these "Limited Travel" lifters?

12-07-2016, 09:34 AM	#32
Rick Schilling Member Join Date: Feb 2009 Location: Indy Posts: 103 Likes: 18 Liked 14 Times in 10 Posts	Re: Lifter rule in Stock I know this should be obvious, but if your combination already uses hydraulic roller lifters you can convert to solid rollers now?

12-07-2016, 11:57 AM	#34
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,116 Likes: 166 Liked 654 Times in 209 Posts	Re: Lifter rule in Stock Seems to me that after a lot of good intelligent questions have surfaced and been discussed, a rule clarification will probably be forthcoming. Yes, Billy, the solid roller lifter comment is a real good probability that RPM's might possibly be affected for good. I know that a mechanical lifter camshaft has clearance ramps included on each end of the lobe configuration to allow for lash, and that the overall lift also compensates for valve train lash. If you tried a set of mechanical lifters on your existent hydraulic cam, what would you use for lash on an initial effort before replacing the cam?We're talking going to a test and tune,not some kind of national event.

12-07-2016, 11:57 AM	#35
Dan Fahey VIP Member Join Date: Oct 2008 Posts: 2,114 Likes: 1,078 Liked 181 Times in 111 Posts	Re: Lifter rule in Stock Holy Super Stock Batman !!! Stockers with SOLIDS ! D

12-07-2016, 12:34 PM	#37
Bob Don VIP Member Join Date: Oct 2002 Location: Greater Boston Posts: 1,477 Likes: 994 Liked 784 Times in 176 Posts	Re: Lifter rule in Stock A cottage industry of high tech, high dollar stocker hydraulic lifters is made obsolete overnight by the stroke of a pen... __________________ Bob Don 128 SS

12-07-2016, 01:08 PM	#38
Bill Diehl Member Join Date: Dec 2013 Posts: 311 Likes: 2 Liked 9 Times in 8 Posts	Re: Lifter rule in Stock If they are going to clarify the rules...what about the diameter? __________________ __________________ Bill Diehl B200 C/D STK

12-07-2016, 07:26 PM	#40
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,116 Likes: 166 Liked 654 Times in 209 Posts	Re: Lifter rule in Stock I assume that would have to be at or near operating temperature. Also, how much would you gain over these "Limited Travel" lifters?