Re: 2012 Rules Are Posted
 

As others have already pointed out we have roller rockers, 5 lb weight breaks for ASCJFU/S, and window safety net guidelines but yet they still won't allow good seats??

Re: 2012 Rules Are Posted
 

idiots, the lot of em

Re: 2012 Rules Are Posted
 

I assume this puts Clark Holroyd's rocker arm system out to pasture? Also, what does this do to the high dollar hydraulic lifter market?

Re: 2012 Rules Are Posted
 

i do not see anything about roller rockers
it says rocker arm are not roller rocker arm

Re: 2012 Rules Are Posted
 

SECTION 10A: STOCK CARS, ENGINE: 1, ROCKER ARMS (Page 5)
OEM or OEM-type aAftermarket rocker arm permitted. Either adjustable pushrods or adjustable OEM rocker arms permitted on any application, but not both. Aftermarket rocker arm must be identical to OEM. Either adjustable pushrods or adjustable OEM rocker arms permitted on any application, but not both. OEM roller rockers permitted ONLY if application was originally equipped with roller rockers.


Note that the part in red is actually "struck through" in the NHRA publication, meaning it is the old rule that was amended and no longer applies. The part in blue is the new rule and the portion of the old rule that remains.

So here is what the new rule, by itself, actually says : Aftermarket rocker arm permitted. Either adjustable pushrods or adjustable OEM rocker arms permitted on any application, but not both.

The removed the part of the rule requiring the rocker arms to be identical to the OEM rocker arms.

What that means is that aftermarket rocker arms no longer need be identical to the OEM rocker. The only aftermarket rockers that are not identical to OEM rockers are race type roller rockers.

Note also that the rule as written and published is exceptionally and unacceptably vague. Nowhere does the new rule stipulate or specify that the OEM ratio or mounting configuration must be retained. By the letter of the rule, shaft mounted 1.9:1 rockers are not prohibited.

Now, of course, the NHRA position on this will revert to their standard "just because we did not tell you that you could not do that, does not mean that you are allowed to do that."

Re: 2012 Rules Are Posted
 

There is already a rule about stock ratio rockers. Jeff Teuton ran into this problem on record tear down.

Re: 2012 Rules Are Posted
 

All these "insert # of A's" stockers going 8s on 9 inch tires sound like a disaster waiting to happen to me. Or as was mentioned before , a 160 mph car drilling a 100 mph car in the rear in the lights. Good luck to everyone.

Re: 2012 Rules Are Posted
 

That rule changed. They removed : Aftermarket rocker arm must be identical to OEM so there is no longer a written rule saying the OEM ratio must be retained. The part listed in red above is what required the OEM ratio.

Supposedly the rule will be amended, again, to require the OEM ratio to be retained, as well as the OEM mounting configuration.

Re: 2012 Rules Are Posted
 

Only people who have never seen the wrecks in the " 10.5" tire power adder" classes running low nine and faster ET's would think a 3200 pound car on a 9" slick with a power adder running 8.50 at 160MPH in Stock Eliminator is a good idea.

Re: 2012 Rules Are Posted
 

Supposedly the rule will be amended, again, to require the OEM ratio to be retained, as well as the OEM mounting configuration.[/QUOTE]

After inquiring NHRA, I got a reply stating that an amended, more detailed explanation will be added in the near future.