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BBC Aluminum Cylinder Heads


colonel

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Tried to find some past posts on this subject but didn't come up with any posts that went over the options available today.

 

I am interested in Oval Port, Hydraulic Roller applications. Would prefer not to have the heat riser passage. I am concerned about some of the heads having a raised exhaust port and what problems that will cause with reconnecting the headers and exhaust, if there are any problems. Some only raise it by .25 others by .6 (Yikes?).

 

I have tried the Pro Comp PC3021-396 but returned them as the intake ports were off by as much as 1/8 inch on the set I got and so were the ones pro comp had in stock. They didn't seem to be too concerned about it but I didn't feel like remanufacturing heads that should have been built right in the first place. I could either get the intake gasket ports to match the ones on the heads but not line up with the bolt holes or line up the holes but not the ports. GOOFY!!! I was told I just had to make the bolt holes bigger on the intake gasket. However the gasket matched the intake perfectly so moving it over to match the heads meant the intake now didn't line up with the gasket or heads. Anyway it seemed like a good deal but turned out it wasn't.

 

I know I can make my 781 castings flow as good as the aluminum versions but would like to advantage of the lower weight and better heat dissipation if it isn't too much trouble to install or cost to get the heads that would be best for my mainly street car that visits the track a few times a year for confimation of changes I have made actually making more power.

 

Any info/experience y'all have had would be helpful.

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there are some very nice oval port heads available out there, Brodix race-rites would be the ones I lean towards, I had a set of Edelbrocks, I liked them a lot, but if you are running a domed piston you have to be careful

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Found these 2 articles that provide some testing to go along with their thoughts.

 

http://www.carcraft.com/techarticles/ccrp_0803_big_block_cylinder_heads/viewall.html

 

http://www.dragzine.com/tech-stories/engine/ultimate-guide-to-budget-bbc-cylinder-heads-under-2000/

 

Pistons are speed pro H693CP. Engine was built in 2002 so don't think they are the same pistons as this picture.

 

http://www.jegs.com/i/Sealed-Power/844/H693CP/10002/-1

 

Engine builder said it had only 9.75:1 so don't think there is a dome but haven't seem them myself.

 

Cam is a 11-433-8 Comp Cam Hydraulic Roller.

 

http://www.compperformancegroupstores.co...e=MARKIVCAMHRXE

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I just went through this. I went with the Brodix Cylinder Heads Race-Rite Oval Ports.. Everthing bolted fine. Stock bolting locations. I also got alot of help and parts from Crazey Davey and Dal. Great guys and alot of help... I got the Bare heads and Davey got me the rest.

 

http://www.summitracing.com/parts/bro-2060000/overview/

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