Who makes the best aluminum heads for Pontiacs?
They are hard to find because aluminum headers for the pontiac melt at high temps. Are you just trying to drag and want less weight?
right now, i'd still stick to the edelbrockskauffman is making good progress, but i think you should wait for new and improved versions so they can tweak out the bugsif you've got $ and plenty of time to spend - buy complete/assembled ones that are ported/polished by Kauffmanthat way, they're dealing with their own head...and if it has issues - they deal with themrather than taking a bare casting to your engine guy that finds out the casting has problems
I'm interested to know why you like the Kaufmann heads. I know they have a modern heart-shaped chamber design which gives better combustion, but will that be enough to make up for the inherent limitations of the a bolt on d-port head with stock port locations? Also if you've got $$$ what about the allpontiac tiger heads that John Kaas used in the Engine challenge?
I went low 10's with a set of E-heads in my 3400lb GTO. They'll make all the power you could ever want and you know coming from Edelbrock, you won't have problems with them.
I notice the original entries on this thread are pretty old. Kaufman has a line of what they call 'high port' heads now with the round port exhaust setup similar to the E-heads, but with a heart shaped chamber and high flow numbers out of the box. Something to look into....In Edelbrock's favor, I recently examined a set of Chevy E-heads in a shop, and in box stock form, I was really impressed with the quality of the port shape, which was very smooth and looked like a set of good hand ported heads. If the Pontiac heads they make are similar, it's no wonder they run so good. I know of several happy customers, but have never been able to see a set off a block for comparison.
Roland racing has just come out with an aluminum head (CV-1) with a canted valve configuration- early dyno testing shows it to be better than anything in production. This design is similar to BBC racing head designs, where the ports are fully optimized for full flow.Geno
My bang for the buck choice is the KRE heads. The updated chamber shape promotes better flame travel, and I believe the plug was also relocated . I chose them because of better performance and NO purchase of round port headers. That saved hundreds of $$. My only concern is the terraced machining of the chambers to larger cc from as cast size. I understand any sharp edges can cause detonation. Mine are for my spare 455 so before use I will smooth them and check cc. Then if needed will have them shaved. I was concerned about fuel octane so chose the larger size. With the heat disappation of aluminum it may not be as big of a deal as I thought. Good Luck
Im sorry you must have misunderlistened !
A friend of mine purchased the KRE heads last year and was very disappointed. His machinist said that they needed a massive amount of machine work to finish them and he said they were cheaply cast. He sold them on Ebay and bought "street/strip" ported 6x heads. Why Aluminum heads? Jim Taylor and other hardcore pontiac engine builders make 700 hp with factory iron heads. If you look back at Pontiac magazines from the 1990s, there are plenty of 9 and 10 second GTOs and Firebirds running ported factory heads. The guy who does the porting for Jim Butler Performance does an awesome job with iron d-port heads. Thermal efficiency is better with iron because it doesn't dissipate the heat as fast as aluminum. Less heat = less horsepower.
Iron heads may lose less heat, but aluminum heads can be run with 11:1 compression with pump gas. Can't do that with iron heads. Aluminum heads are MUCH lighter. Edelbrock heads flow 280cfm out of the box and 320 cfm with some minor porting. I would not run a KRE head. A friend purchased a set and they flowed no where near what was advertised. He also spent another $1000 to fix the problems with poor quality of casting. When he called KRE before he had the heads fixed they hung up on him. He did have them fixed and they do work but, after all the money he spent he could have almost paid for a set of the new CV-1 heads. I have had 2 sets of Edelbrock heads. One from R&R Engineering That were one of the first 50 Edelbrock produced and the second set I won. Both were of high quality and could be run right out of the box. A 8.5:1 comp motor with a way too big cam went 11.90's in my 3900lb 75 TA. It did sound nasty at idle, and that's what I wanted. The 2nd set flow 320cfm@600" list and I run 11.50 with 10.3:1 compression and the proper cam . I love my Edelbrock heads.
You have been just givin' the Bird