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

Piston Question

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Old Jan 6, 2005 | 01:34 AM
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Default Piston Question

I have a 86 L98 Vette with iron heads I was wondering does this engine come stock with Flat Top Pistons or not ?????

Thanks
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Old Jan 6, 2005 | 01:42 AM
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I believe so. Cast ones-Someone correct me if I'm wrong
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Old Jan 6, 2005 | 02:16 AM
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Originally Posted by Black_Vette
I have a 86 L98 Vette with iron heads I was wondering does this engine come stock with Flat Top Pistons or not ?????

Thanks
yours answer may be here:flat top pistons
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Old Jan 6, 2005 | 03:10 AM
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Originally Posted by cuisinartvette
Cast ones

85's were the only ones with factory forged pistons.
Missed 'em by a year BV
I think I remember the stockers as having valve reliefs also.
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Old Jan 6, 2005 | 05:17 PM
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Just put new rings in my early 86 and it has flat top Hyper-pistons with the standard four valve reliefs in them. Hope this helps.
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Old Jan 6, 2005 | 07:35 PM
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Originally Posted by 89 Paul in Cal

85's were the only ones with factory forged pistons.
Missed 'em by a year BV
I think I remember the stockers as having valve reliefs also.
1984 and 1985 used the same pistons. And yes, the were forged for those 2 years.

RACE ON!!!
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Old Jan 6, 2005 | 09:10 PM
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Originally Posted by CFI-EFI
1984 and 1985 used the same pistons. And yes, the were forged for those 2 years.

RACE ON!!!
Interesting... and true. I was not aware that GM did this so I looked it up. I wonder why they went from forged on those two years to cast pistons that acually weigh more on cars that are supposed to be increasing power?
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