ZZP aluminum heads!!!!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-03-2006, 08:28 PM   #1
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Default ZZP aluminum heads!!!!!!

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Old 07-03-2006, 08:38 PM   #2
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No thanks. Think of all the cars in history that have head gasket leaks. They have them because the blocks are cast iron, and the heads are aluminum. The two metals expand and retract from heat and cold at different rates.

These are for the hardcore track hound who also installed ARP studs so he can pull his heads 3 times a year to replace the gaskets.
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Old 07-03-2006, 08:39 PM   #3
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Leave it up to ZZP to always push the limits. Hate to see the price tag on these heads though.
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Old 07-03-2006, 08:51 PM   #4
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Quote:
Originally Posted by willwren
No thanks. Think of all the cars in history that have head gasket leaks. They have them because the blocks are cast iron, and the heads are aluminum. The two metals expand and retract from heat and cold at different rates.

These are for the hardcore track hound who also installed ARP studs so he can pull his heads 3 times a year to replace the gaskets.
I see your point.
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Old 07-03-2006, 09:34 PM   #5
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Quote:
Originally Posted by OLDsman105
Quote:
Originally Posted by willwren
No thanks. Think of all the cars in history that have head gasket leaks. They have them because the blocks are cast iron, and the heads are aluminum. The two metals expand and retract from heat and cold at different rates.

These are for the hardcore track hound who also installed ARP studs so he can pull his heads 3 times a year to replace the gaskets.
I see your point.
More then likly they will be setup to run more head studs then stock. They have been doing this with many of their setups.
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Old 07-03-2006, 11:28 PM   #6
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Yeah, i like the Cast on Cast, no differential in heat disipation between the two materials, makes for happy headgaskets lol
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Old 07-04-2006, 02:28 AM   #7
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The aluminum heads would dissapate heat much better and you could run higher compression or more boost without detonationi.
Don't forget the benefits as well as shaving off some weight.
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Old 07-04-2006, 02:49 PM   #8
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Would Cometic MLS gaskets help at all between the metal variation between the block and the heads? http://www.zzperformance.com/grand_p...ts1.php?id=102
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Old 07-04-2006, 10:54 PM   #9
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There are millions of cast-iron block / cast-aluminum head motors on the road in vehicles driven everyday and they never seem to be blowing head gaskets 3 times per year. How does GM keep the head gaskets sealing on their LQ9 6.0L HO truck engine? Iron block with aluminum heads and 340 hp / 380 lb. ft. of torque and 10:1 comperssion.

My uncle'* GMC Yukon XL Denali has 90,000 trouble free miles on it, and it had Al heads on an iron block. No head gasket problems for him. Maybe that'* just an odd-ball that survives Al heads.

Aluminum heads are excelent for horsepower, and that'* what most on this board what, right? Like an earlier poster said, they cool better and allow higher compression ratios with less knock retard. On top of that, they're lighter. Seems like a good deal to me. Just wish I could afford to put those on my car.
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Old 07-04-2006, 10:56 PM   #10
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Those are real nice gaskets that I'm sure is designed to improve the reliability of the gasket......but at $160. you are paying for it.
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