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What's the difference between 088 and 2934 heads?

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Old 02-28-2015, 07:58 AM
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Default What's the difference between 088 and 2934 heads?

I put my freshened 088 heads on last night and pulled the valve covers on the other engine off and saw they were 2934.

I have access to some 088 heads for free which I will completely go through so I have a ferret match on the motors, but I was just curious......
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Old 02-28-2015, 10:46 AM
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the 2934 head is a gen6 502 open chaimber marine head.it should be the same as the 088 head.the 088 head was used on 454-502 gen 5 marine from 92 and up.
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Old 02-28-2015, 11:59 AM
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they are the same as this charts shows

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Old 02-28-2015, 12:00 PM
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and heres the link to the web site,it has all the oval ports there too.

http://www.minuit10.net/EngineCode/c...linderHead.htm
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Old 02-28-2015, 01:31 PM
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i use mortec,has all the block&head casting numbers and they go way back.
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Old 02-28-2015, 01:32 PM
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Sea,

Rectangular Port GM Part No.: Casting # / Part#
6272990 / 6260482 or 14096188 Original LS-7/LS-7 Open Chamber Designed for the MK IV block

140970088 / 14096802 Service replacement head for the Gen V block

12562925 / 12562934 Service replacement head for Gen V / VI block with 7/16 accessory holes

12562926 / 12562934 Service replacement head for Gen V / VI block with 3/8 accessory holes

The last two are current working part numbers. All heads from GM have the 2.180/2.190 intake valve (as delivered from GM)

Verify block compatibility


Combustion Chamber Volume (cc):
118cc

Intake Runner Volume (cc):
325cc/318cc

Exhaust Runner Volume (cc):
125cc

Intake Valve Diameter (in):
2.180/2.190 3/8 Valve

Exhaust Valve Diameter (in):
1.880 3/8 Valve

26 Intake valve
17 Exhaust valve
4 Splay

All heads share the same basic port architecture and combustion chamber design. There is no significant performance differential between the heads.
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Old 02-28-2015, 05:36 PM
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Okay, so it sounds like I don't need to be worried at this point. I'll just have the 2934's gone through same as the others and keep on trucking....

I was worried I might have steered you wrong bin in what you put together for me. I should have spent the 2 minutes pulling the other valve cover off before now, but it doesn't sound like it would have necessarily changed the approach
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