Edelbrock aluminm Mopar heads legal ??

[James L Miller]

A. Cylinder Heads, Aluminum
Head casting number 452 is complete with valves and springs (2.14" intake and
1.81" exhaust). Flow is 290 cfm intake and 217 cfm exhaust at .600" lift. These
ready-to-bolt-on Heads use a straight plug design so you can use stock exhaust
manifolds or many popular aftermarket headers. 361 and 440 Engines
1 P5153524 Cylinder Head, Aluminum, Includes Valves and Springs,
Straight Plug, 84cc, 2.14" Intake / 1.81" Exhaust, "B/RB"
Engines

Anyone understand why MP made this head? It has the 452 casting number on the runner, then has oversized valves? Why didn't they make one with stock size valves? It would be easier to make it legal with stock size valves.

[James L Miller]

performer rpm biG-block chrysler
• For 1961-1979 361-440 B and RB Big-Block Chrysler wedge engine
• Uses a straight spark plug angle
• Stock bolt hole locations, compatible with stock valvetrain components
Chamber Deck Intake Exhaust Intake Exhaust Part No.
Volume Thick. Port Vol Port Vol Size Size
82-84cc 5/8" 210cc 70cc 2.25" / 2.00" 60917

This is what is on the Edelbrock flyer. I don't know about the valves listed.

[Jeff Lee]

Standard old B/RB engines use 2.08"I / 1.72"E valves.

[Chris DeGidio]

2.08/1.74 in B/RB heads. I think the 2.25/2.00 in the Edelbrock flyer is a misprint.

[Jeff Teuton]

The NHRA specs make one take the head, pull the big valves and narrow stems, and put in the 2.08 etc. I disagree with this policy and think they should allow the head as-produced with it's own factor, say 10 better than the stock and let the system work. A real money saver there. This subject has been somewhat vetted by the Ford guys with the Edlebrock heads. Hawk tried to get the ruling I favor, but I don't think it got done. Maybe they feel better now.

Jeff, The 390 Ford Iron head has a 144 cc intake runner and a 103 exhaust runner. The Edlebrock head has a 173 cc intake and a 123 exhaust and is rated 8 hp more than the iron counterpart. You can find those heads everywhere.
I agree with you, what ever Edlebrock produces as a replacement add HP to it and let the system work. So we as the racers can buy new available, and afordable castings to race with. Plus we can support the people putting money into our sport.
The Ram Air 2 cylinder head castings for the car I run, is Impossible to find. The set on the car cost 2500.00 just for the castings. I'd take 20 HP just to be able to buy them.
NHRA need to be flexible and work with us in allowing some new parts so we can keep racing our cars. Something everybody should fight for that has to purchase rare and expensive castings. Just my 02 cents

Originally Posted by Jeff Teuton

The NHRA specs make one take the head, pull the big valves and narrow stems, and put in the 2.08 etc. I disagree with this policy and think they should allow the head as-produced with it's own factor, say 10 better than the stock and let the system work. A real money saver there. This subject has been somewhat vetted by the Ford guys with the Edlebrock heads. Hawk tried to get the ruling I favor, but I don't think it got done. Maybe they feel better now.

[Erik Jones]

The Edelbrock head will be on the list shortly, it will have the Runner volume as listed from Edelbrock with an HP increase like all the rest. The mopar 452A head has been legal for a while, all of these heads including the iron Stage5 heads all have the big valve combo from the factory. My customers and I have been working with Edelblock for a while now trying to get the head "NHRA" legal and it looks like we have a handle on it. The 452A head and the Edelbrock is the same casting, I have the port design finished so now i am just waiting on NHRA!!!!!!!

Erik Jones
Jones Engine Development

[rustbucket79]

Originally Posted by Todd Hoven

Jeff, The 390 Ford Iron head has a 144 cc intake runner and a 103 exhaust runner. The Edlebrock head has a 173 cc intake and a 123 exhaust and is rated 8 hp more than the iron counterpart. You can find those heads everywhere.
I agree with you, what ever Edlebrock produces as a replacement add HP to it and let the system work. So we as the racers can buy new available, and afordable castings to race with. Plus we can support the people putting money into our sport.
The Ram Air 2 cylinder head castings for the car I run, is Impossible to find. The set on the car cost 2500.00 just for the castings. I'd take 20 HP just to be able to buy them.
NHRA need to be flexible and work with us in allowing some new parts so we can keep racing our cars. Something everybody should fight for that has to purchase rare and expensive castings. Just my 02 cents

What casting numbers are you using as the Ram Air 2? (assuming Pontiac castings) I have a bunch of early Pontiac heads that aren't doing anything. Maybe I have some rare castings that are worth a buck or two.