C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

How many CC's are 86 heads?

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Old 08-20-2002, 02:51 PM
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Steve86TA
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Default How many CC's are 86 heads?

Also what is the stock valve size?Were they all cast iron?
Thanks
Old 08-20-2002, 02:53 PM
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scorp508
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Late '86 corvettes (all convertibles, and I forget the coupe VIN that began it) had aluminum heads.

The aluminum heads had 1.94 intake valves and 1.5 exhaust valves. They were a 58cc chamber. Quickly identified on an L98 Corvette by the centerbolt valve covers as the irons had perimeter bolts.

I don't know the info for the iron heads besides having a larger chamber.
Old 08-20-2002, 03:37 PM
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vader86
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Default Re: How many CC's are 86 heads? (Steve86TA)

AL heads started somewhere around #18,000 VIN for coupes.

I want to say 76cc combustion chamber. 1.94/1.50 valves, not sure though since i cant find the file on my computer.

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