Re: NHRA 2020 Rule Amendment SS Intakes???
 

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.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

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:


http://fepower.net/Products/HR1.jpg

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.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

Didn't Ed Hamburger use to make and adapter to use a small block Chevy intake on a small block Mopar in the '70's?

Re: NHRA 2020 Rule Amendment SS Intakes???
 

As a matter of fact, you are correct! There are a few of those adapters still around.


https://www.forabodiesonly.com/mopar...pg.1715094689/

Re: NHRA 2020 Rule Amendment SS Intakes???
 

I am familiar with the port layout of the Big Mopar and the Chevrolet. I was looking at it more from a width aspect, as I know the 383/400 uses a fairly wide intake. I know to use a RB Chrysler intake on a B motor, you need .85" plates on each side of the intake, as I tried a B-1 intake vs. a Mopar M-1 a number of years ago. Bringing up the 383 Mopar/Chevy intake thing is kind of irrelevant though if they aren't even running the car anymore?

As for the Buick...that started in the late 1960's/early 1970...I believe Kennedy Bell made the plates.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

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.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

Everyone knows there are bogus cylinder heads out there in S/S. Looks like the Tech dept has finally found a way to rid the class of heads that have been drastically cut at a severe angle on the intake side. Those bogus heads usually used a spacer plate to make up for the difference from the OEM angle. In the 2020 racing season it will be very interesting to see who shows up to race and who does not.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

Real Racers will race.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

Angle milling heads has been a machine shop operation since the 1960's. Nothing new.

There are even automotive machining charts that gives you the average amount of milling required on an intake manifold when you deck and square an engine block and when you mill cylinder heads for proper combustion chamber sizing.

By the way, when the runner volumes are measured, it is done without the spacer. An approach would be to weld the spacer to the intake or use a sheet metal intake. Nevertheless, after decades of allowing the use of intake spacers on intake manifolds and angle milled cylinder heads, they are suddenly illegal just months prior to the first race of 2020.

Re: NHRA 2020 Rule Amendment SS Intakes???
 

What do you mean by "real racers"? Can you elaborate?

In my book, anyone that spends the money and time to race in Stock and Super Stock class, is a real racer.