Lifter rule in Stock
 

Does that mean aftermarket roller lifters are ok as replacements?

Re: Lifter rule in Stock
 

Can you expand on this comment?

Re: Lifter rule in Stock
 

The rule change effective today takes out wording about aftermarket lifters. I will look again. More later.

Re: Lifter rule in Stock
 

The words 'oem type' have been eliminated from the description. See 2017 Rule Changes. Anyone know the meaning of this?

Re: Lifter rule in Stock
 

I believe this means , at least in Chebbie Land, that you can run an early block and cross bar type lifters in place of an OEM late model set up, as long as they are hydraulics.

But, we were told , here on CR, earlier this year, that this was already legal.
It sounded bizarre to me at the time, but on the other hand, I didn't doubt it for one minute.

Now, what this means in the world of Mother Mopar, I haven't a clue.

Re: Lifter rule in Stock
 

Does this mean that solid lifters are now legal? In my mind Stock hasn't been using oem type lifters for years. Light weight ceramic lifters don't seem oem type to me.
Pete

Re: Lifter rule in Stock
 

The only thing that chages is a "Solid" can replace a "Hydraulic" basically nothing changed.
As per NHRA tech Dept today.

Re: Lifter rule in Stock
 

So throw away all trick hydraulic stuff and go to solid lifter cams. Will make cam checking by NHRA (and racers?) a lot easier, don't have to pull anything apart to replace the lifter for checking. Of course ya gotta buy new stuff.

Re: Lifter rule in Stock
 

Just my take on it, but since they ramble on about hydraulic lifters, it might appear that hydraulic rollers may be used in place of hydraulic flat tappets, like Jeff originally thought. If solids were allowed, then the words like "plunger", "plugged" & "bottomed" should have been eliminated.


Solids in place of hydraulics would have been cheaper & simpler. But with rollers you have to change the cam and possibly pushrods & springs to accommodate a roller profile & lifters!

Re: Lifter rule in Stock
 

I agree with all that, but how many of you have ground up a good motor with flat tappet lifters and aftermarket hydraulic rollers would not do that. I don't have any issue with any of this. I have all rollers, but to guys I know and in my past, I have eaten a few good motors.

Re: Lifter rule in Stock
 

This is the actual language on the 2017 rule change.
It's not clear enough and it needs to be explained better.
It does not say that hydraulic lifters can be replaced with solids.
It still gives the requirements for checking hydraulic lifters.

Re: Lifter rule in Stock
 

If I misunderstand this change, sorry! The guys who use solid lifter engines are getting screwed over do to no chance on manipulating the lifters. It's bad enough that .010 in a hydraulic is considered OK by NHRA. The engines HP were based on the lifter working the way the manufacturer designed it, not the way they are now with a built in lash. Might as well let everyone use solid roller cams and get over with it.

Casey Miles
248H Stock

Re: Lifter rule in Stock
 

After re-reading this, I think it gives the okay for ceramic bottom lifters, ..about 15 years after the fact.
I'll have to call my law firm , Dewey, Screwum , and Howe, and get an interpretation.

Re: Lifter rule in Stock
 

It also still says you must use OEM rocker arms or adjustable push rods (not both)????? The roller rocker OK has been law for several years? Jim

.

Re: Lifter rule in Stock
 

Yes Sir ! Get it over with, solid roller cams need to be allowed, Look cars built after 1985 almost all have roller lifters, that's over thirty years ago and the (getting smaller) number of the older cars are almost fifty years old now, at this point with all the rule changes in stock to the valve train what difference will roller lifters really make .

Re: Lifter rule in Stock
 

Yeah, give everybody solid rollers.

Then next year, give everybody 0.700" lift.


:rolleyes:




A couple years down the road, wonder why you have a 9" tire Super Stock class, spiraling out of control.

Re: Lifter rule in Stock
 

Alan, I was thinking the same thing...stock lift but any duration...and roller rockers....and now solid lifters...and.....

All them "hyd" motors are going up in rpm now!

Re: Lifter rule in Stock
 

A couple years down the road? That ship sailed a long time ago.

Re: Lifter rule in Stock
 

X2. If you want roller lifters, go buy or build a SS car!

Re: Lifter rule in Stock
 

All I saw in the rule revision was an amendment allowing what has been accepted for years. Ceramic based lifters or coated tool steel lifters are not new,as we all know.If your combo came OEM with rollers, use rollers. If it didn't, does this language imply or specify a change over? I didn't read that.Accepted lifters for the last 10-15 years,be they ceramic based or coated steel, were still an OEM configuration. Running even OEM valve trains with lash isn't new either. What does this revision possibly change?

Re: Lifter rule in Stock
 

If all cars can have roller lifters then what are the penalties for HP all non roller lifter cars get HP, lets say 40 hp. What are the rollers lifters and cams worth, don't tell me they there are no gains there. I few people cry about there ceramic lifters coming apart now they want roller lifters for free. Nobody forced you to put ceramic lifters in, the rules don't state you have to use ceramic lifters.

Re: Lifter rule in Stock
 

My Bad. Solids ok. Rollers no. Sorry for the mistake. Just as a footnote to history; the first time Cliff Sherman (father to famous J. Allen) shimmed a lifter with a transmission spring was just about the time Chris landed on the sunny beaches of Santo Domingo. Footnote to footnote: That is Christopher Columbus when he landed in Santo Domingo in 1492.

Re: Lifter rule in Stock
 

For sure I know pops was doing them that way in the 80's uncle Jeff! lol

Re: Lifter rule in Stock
 

NHRA needs a Q and A section on their site to allow questions to be asked related to any rules changes/revisions.

That way everyone gets to see what Tech's response is

Re: Lifter rule in Stock
 

So to review. This revision it to allow aftermarket style solid lifters, for a solid lifter combo only? Or is this to allow solid flat tappet lifters in place of a hyd flat tappet lifter combo? I read the revision and everyone's comments but just want clarification.

Robert

Re: Lifter rule in Stock
 

I just emailed NHRA Tech to get clarification on the new language. This is the response:

"The intent was/is to allow the use of a solid lifter in place of a hydraulic, you may not replace a flat tappet with a roller.

Thanks

Joey Gorman
NHRA Assistant Regional Technical Director
Office-(317)-969-8609"

...and there you have it.

Re: Lifter rule in Stock
 

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

Re: Lifter rule in Stock
 

Thank you getting the correct information and posting the email...

Now I can print it off and put it in the racecar glove box with all of the other NHRA explanations....

Bob

Re: Lifter rule in Stock
 

I'm going to keep my hyd. lifters, solids would be a lot noisier and then I would have to keep them adjusted, and that might..............would cut into my adult beverage time.

Re: Lifter rule in Stock
 

Ok, I'm a little slow sometimes, I was about to buy some good hyd lifters, can I instead buy solids now? Or just wait till all those hyd lifters hit the for sale page?

Re: Lifter rule in Stock
 

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.

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?

Re: Lifter rule in Stock
 

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!

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.

Re: Lifter rule in Stock
 

Holy Super Stock Batman !!!

Stockers with SOLIDS !:eek:

D

Re: Lifter rule in Stock
 

One step closer to SS for sure Dan ;)

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...

Re: Lifter rule in Stock
 

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

Re: Lifter rule in Stock
 

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

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?