NHRA 2020 Rule Amendment SS Intakes???

[Crew Chief]

As it was just explained to me, the new rule applies to those who have an angled spacer plate being used to replace material that has been cut off at an angle on the intake side of the head. They will also be looking for the OEM angle between the intake side of the head and the block side of the head. That is what the +/- 2 degree allowance is about.

[Joey Bohannon]

Merry Christmas to all, I hope Santa is good to you all......Oh wait, you already got your gift. Maybe we will get ours next year, lol.

[Bryan Worner]

Originally Posted by SSDiv6

Was just looking at the new NHRA 2020 Rule Book amendment prohibiting spacers between the intake and the cylinder head.

They already allow sheet metal intakes and also two piece intake manifolds split in the middle in the class so what is the difference in having a spacer between the intake and cylinder head?

This will effect many cars including Mopar 383 with Chevy intakes, Ford FE with 351C intakes and AMC with Mopar intakes running spacers to fit these intakes.

Mopar 383’s with Chevy intakes???? Shouldn’t Mopars run Mopar intakes? Shouldn’t Fords run Ford intakes? How many Chevys run Mopar or Ford intakes? Doesn’t Edelbrock make intakes for Ford and Mopar??? In Super Stock, isn’t the engine combination supposed to match the make of the car? If it didn’t before, I guess it does now, huh!!!

[james schaechter]

Originally Posted by Bryan Worner

Mopar 383’s with Chevy intakes???? Shouldn’t Mopars run Mopar intakes? Shouldn’t Fords run Ford intakes? How many Chevys run Mopar or Ford intakes? Doesn’t Edelbrock make intakes for Ford and Mopar??? In Super Stock, isn’t the engine combination supposed to match the make of the car? If it didn’t before, I guess it does now, huh!!!

Why would that matter when sheet metal fab intakes are legal?

[Lee Valentine]

Any intake manifold,don't screw with the intake surface of the head is how I understand it. Years ago when John Gunn was torn down NHRA wanted to look at his manifold and he told them no I'm allowed any intake and locked it in the trunk. He said you're not going to look at it and tell all your friends,he got the record and never showed the inside of the manifold.

[james schaechter]

Originally Posted by james schaechter

Why would that matter when sheet metal fab intakes are legal?

The intake manifold is not really the issue as I see it.

And, As I understand it, this is really just an attempt to stop creative port increases. If you don’t change the angle, then you would not be able cut as much off the head. to use a spacer as an extension of the intake port.

Maybe they should allow the heads with angles more than 2 degrees, but add in the volume of the spacer and add that to the port volume?

I am pretty sure anyone with heads that are modified that much know why they did it and what the rule means to them.

[Jeff Niceswanger]

Originally Posted by Bryan Worner

Mopar 383’s with Chevy intakes???? Shouldn’t Mopars run Mopar intakes? Shouldn’t Fords run Ford intakes? How many Chevys run Mopar or Ford intakes? Doesn’t Edelbrock make intakes for Ford and Mopar??? In Super Stock, isn’t the engine combination supposed to match the make of the car? If it didn’t before, I guess it does now, huh!!!

I don't think any racing style aftermarket manifolds were made for Cadillacs. Ken Sharp come to mind.

[jmcarter]

Originally Posted by Jeff Niceswanger

I don't think any racing style aftermarket manifolds were made for Cadillacs. Ken Sharp come to mind.

...or Bob Dennis.

[Steve Stasko]

I'd like to see a Chevrolet intake on a 383 Mopar. Two very different platforms, and there are plenty of decent enough Big Mopar intakes to not warrant the need for that.

That being said...on the Cadillac topic...Cad500parts.com has the answers to all your Cadillac high-performance questions.

[SSDiv6]

Originally Posted by Steve Stasko

I'd like to see a Chevrolet intake on a 383 Mopar. Two very different platforms, and there are plenty of decent enough Big Mopar intakes to not warrant the need for that.

That being said...on the Cadillac topic...Cad500parts.com has the answers to all your Cadillac high-performance questions.

When Dave Smith (ProTrans) and his brother ran their 383 'Cuda many years ago, it had an adapted BBC intake.

The BBC has a pitch of 4.84 and the Mopar BB has 4.80. The port runner layout for both is: 00 00

How about fitting a 351-C intake on an FE engine? It can be done with the adapter shown below:




Engine builders and racers can get creative in many ways.
Nevertheless, what is the fuzz all about when they allow sheet metal intakes?

As a matter of fact, Buicks are adapting Mopar intakes.