Aftermarket/Replacement Cylinder Head Rule Change

[Nmbr1GMfan]

Originally Posted by ron mattson

I have to laugh right below this post is a
ad from jegs for the NHRA "legal" performer
rpm heads!! Lol

That's because you were searching for them LOLOLOLOLOL!

[Coleydog]

Wow, with all those different Chevy heads it does look like crate engine time. I thought we had it bad with a Chrysler, 2 maybe 3 different ones. Is Ford like that? I know they got a ton of different engines.

[PJ305]

Originally Posted by ron mattson

No worries guys I'm quite sure there will be
Another aluminum head out soon with smaller
runners 165 ish and possibly another brand
of aluminum head, I would not get so worked up
until the dust settles 30-60 days.

Has anyone contacted NHRA and have them explain how the SBC heads they approved are going to maintain the same runner volumes as the stock head they replace!

Originally Posted by PJ305

Has anyone contacted NHRA and have them explain how the SBC heads they approved are going to maintain the same runner volumes as the stock head they replace!

It’s up to the racer/engine builder. Not NHRA how that is accomplished. No different that the way it is done now with OEM heads and replacement heads. The NHRA night allow the bigger head and volume the way it is. It’s happened for some of the heads approved now.

[goinbroke2]

So, first;
Do you think Edelbrock did their due diligence and got this head accepted, good for them, or
Edelbrock somehow has an "in" and that's why so many of their heads are approved (conspiracy theory?) and this is all about padding the coffers of a company loyal to nhra?

Second;
I have numerous ford heads in my shop, but they are not the correct year/number/etc so basically they are garbage, even though they are unmolested stock heads. Would love to see the hundreds of ford heads replaced with one as well.
Alternatively, I'd like to see all the ford heads that are identical but different years all accepted as the same. Same valve size/chamber size/runners/everything but they have different numbers due to the casting year. Yes some have big/small plugs (no performance advantage) and different rocker arm bolt down methods, but seriously, I'd rather just say if its a stock ford head, then its good.
Obviously 4v and 2v Cleveland casting are different and would need different numbers, but all 2v heads and all 4v heads could have the same number.

Third;
Just questions, don't get your panties in a twist! Lol!

Of all manufacturers to get a replacement stock head..chev? REALLY??? Change ford or dodge and you will affect a certain number of racers, but sbc??? AMC, I could see that, or Pontiac...Buick maybe...but CHEV??? How about a caddilac head, I could see that....

[Jim Hanig]

Originally Posted by PJ305

Has anyone contacted NHRA and have them explain how the SBC heads they approved are going to maintain the same runner volumes as the stock head they replace!

When was the last time they checked yours?

[Randy Parker]

Nhra making America great again!

[X-TECH MAN]

Originally Posted by randy parker

nhra making america great again!

lol................

[Dan Fahey]

Originally Posted by X-TECH MAN

lol................

Wasn’t there a class called "Modified Stock" ?

Seems like the Stockers today fit that Class?
and
Going quicker!

D

[Chuck Norton]

Originally Posted by Dan Fahey

Want there a class called "Modified Stock" ?

Seems like the Stockers today fit that Class?
and
Going quicker!

D

That's just NHRA admitting that Terry was right when IHRA introduced the crate motor classes over twenty years ago. Our end of the sport is faced with a singular problem that has been addressed in multiple ways. Terry's solution was simpler, made allowances for the people who couldn't afford "enhanced" parts, and a ton cheaper!

c