NHRA allows Alum heads in stock/ss

Thats a little extreem. A few new parts don't make us Comp cars. Now Modified might be more fitting. At least if you run a car with a Holley carb in stock, then you can run a brand new Quick Fuel 750 with all new parts and no HP penatly.

Originally Posted by Dean3870

JOKE!!! just call it jr. comp
mike dean
3870

[Jeff Teuton]

Before I sold my 69 Super Bee, I could not find a pair of 906 castings out of a hugh pile we have accumulated over the years that were worth the 3k or so it takes, and my old stuff done in l995 were getting weak. I know for one new parts are needed for the old cars and they will run faster. In the case of the Mopars, the old 906 heads were 3/8 stems, 2.08 1.74 valves. The Eddys and Mopar come with 2.14 and 1.81 valves and 11/32 stems. So now one has to put in 16 new seats, 16 new guides, and 16 new 3/8 valves. This I disagree with, and suggested the heads out-of-the-box @ +10 (a bargain for any combo) and about $1500 cheaper. The heads have to meet the specs from the year claimed, hence change the aforementioned stuff, and only get +5, probably still a bargain. A move in the right direction. The original configuratiion voiced by some are gone, like Clark Gable, with the wind. And you don't have to run them, just like the rockers. What am I misssing here?

[CycloneFE]

Jeff,

I agree with you and some others. If you stop and think about it, when I started my way into this, wanting to run the 428FE, if I did not have a motor to begin with finding a good one to start with was nearly impossible. Later when I took my motor to my engine guy he stated that my heads(original) were probably the best since the Edelbrock were cast smaller to leave room to port and therefore showed little if any gains on his dyno. The FE head is so small, physically, that the weight savings is negligible also, and I will not have to carry the extra hp. If I did NOT have a motor, the aluminum head would defiantly be the way to go. Old parts are scarce, worn, and if we want to keep racing, we need a little help.

Just my opinion.

[Wade_Owens]

Originally Posted by Jeff Teuton

The heads have to meet the specs from the year claimed, hence change the aforementioned stuff, and only get +5, probably still a bargain. A move in the right direction. What am I misssing here?

Jeffrey, you know we're tight and I like ya, but, I aint fallen for this one. The specs (volumes) are one thing, the port shapes, guide sizes, short turn radiuses, valve distance to center of the chamber, plug location, chamber shape etc, are all going to be better. Why would Edelbrock build an EXACT duplicate of ANY oe cylinder head? They are going to install all known performance advantages to entice the buyer to purchase a set of these "replacement" heads. Like I said, otherwise, why bother? Original heads are out there. If you chose a combo that these parts are not available, you shouldnt lobby for an aftermarket part. (No disrespect to anyone that has, this is my opinion) If I decide to run a Max Wedge, I had better be prepared to search my *** of for a set of unmolested original heads. Carbs are also very hard to find too, but I dont want a Holley accepted on my 283. What you are missing is the oe heads cant legally have these mods that are already engineered into these accepted heads. Remember the angled spark plug adapters? And for the record, I dont think the Pontiacs or the BBC's replacements should have ever been allowed either! But, the barn door has been left open......

I look forward to drinking a tall glass of tea and discussing it at Belle Rose with ya, cant wait for March!!

Wade O

Wade, Pontiac has no aftermarket replacement heads accepted. If nobody was allowed replacement heads I would not want any for my combo. Since the cat is out of the bag, why shoudnt somebody that has to race against these guys lobby for the same type of parts. If we could only roll back the rules to 1977. Those were the days.

[Wade_Owens]

Originally Posted by Todd Hoven

Wade, Pontiac has no aftermarket replacement heads accepted. If nobody was allowed replacement heads I would not want any for my combo. Since the cat is out of the bag, why shoudnt somebody that has to race against these guys lobby for the same type of parts. If we could only roll back the rules to 1977. Those were the days.

Todd, don't get me wrong on this, I do understand why. Just don't blow smoke and tell us they are replacement heads, I don't buy it. If aftermarket parts are allowed for one, they should be legal and readily available for all combos.
Don't the 428 Pontiacs use an alum aftermarket head?
These type of changes are why a simple valve spring rule later causes people to ask for aftermarket seats. The quicker et's are now a cause for safety concerns. Butterfly effect, eh?
Anyway, we'll see how it all goes, can't unring a bell, right?

Wade O

[bubski]

Originally Posted by Wade_Owens

Jeffrey, you know we're tight and I like ya, but, I aint fallen for this one. The specs (volumes) are one thing, the port shapes, guide sizes, short turn radiuses, valve distance to center of the chamber, plug location, chamber shape etc, are all going to be better. Why would Edelbrock build an EXACT duplicate of ANY oe cylinder head? They are going to install all known performance advantages to entice the buyer to purchase a set of these "replacement" heads. Like I said, otherwise, why bother? Original heads are out there. If you chose a combo that these parts are not available, you shouldnt lobby for an aftermarket part. (No disrespect to anyone that has, this is my opinion) If I decide to run a Max Wedge, I had better be prepared to search my *** of for a set of unmolested original heads. Carbs are also very hard to find too, but I dont want a Holley accepted on my 283. What you are missing is the oe heads cant legally have these mods that are already engineered into these accepted heads. Remember the angled spark plug adapters? And for the record, I dont think the Pontiacs or the BBC's replacements should have ever been allowed either! But, the barn door has been left open......

I look forward to drinking a tall glass of tea and discussing it at Belle Rose with ya, cant wait for March!!

Wade O

Right on the only thing that makes these aftermarket heads 'replacement' is that they fit the engine block. totally redesigned port shapes. the only true replacement head that was ever cast by aftermarket were the horrible dart iron replacements that flowed even less than the heads they replaced. I have one simple question to those on here whining they need edelbrock heads. If your racing currently and have a few sets of your unobtainable,rare heads already why do need these new heads now?1 So you can try to do the restoration people a favor and give them your old heads? 2So you can have yours cause someone got theirs ? .Where does it all end?

[Chris DeGidio]

Originally Posted by Jeff Teuton

Before I sold my 69 Super Bee, I could not find a pair of 906 castings out of a hugh pile we have accumulated over the years that were worth the 3k or so it takes, and my old stuff done in l995 were getting weak. I know for one new parts are needed for the old cars and they will run faster. In the case of the Mopars, the old 906 heads were 3/8 stems, 2.08 1.74 valves. The Eddys and Mopar come with 2.14 and 1.81 valves and 11/32 stems. So now one has to put in 16 new seats, 16 new guides, and 16 new 3/8 valves. This I disagree with, and suggested the heads out-of-the-box @ +10 (a bargain for any combo) and about $1500 cheaper. The heads have to meet the specs from the year claimed, hence change the aforementioned stuff, and only get +5, probably still a bargain. A move in the right direction. The original configuratiion voiced by some are gone, like Clark Gable, with the wind. And you don't have to run them, just like the rockers. What am I misssing here?

You are not missing anything Jeff.The heads (Edelbrock,Mopar 452) should be allowed.I know for a fact that a Edelbrock head isn't that much more than a "massaged" 906 stock eliminator head,and the Hp "penalty" you suggested is in line.Another head worth looking at is one from a company called 440 Source.They have a exact duplicate of a 915 head that is aluminum.