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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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77 head vs 770

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770

01-15-2005 08:44:32




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wich head would make more power on a super 77 engine. a 77 or 770 head. Both are ported and polished. The 77 head has 90 thou of, the 77 head has 30 thou off. Both have stock valves I always thought they had the same valve train, but some swear different....Thanks




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J. Schwiebert

01-15-2005 10:23:45




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 Re: 77 head vs 770 in reply to 770, 01-15-2005 08:44:32  
Super 77 & 770 heads are basicly the same head. The push rods and rocker arm supports for a 77 are different than the other 2.



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tractorptsguy

01-15-2005 09:06:52




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 Re: 77 head vs 770 in reply to 770, 01-15-2005 08:44:32  
I have a 77, Super 77, and 770 head, all gas. The Super and 770 look the same and have the same numbers on them. They have much bigger ports and valves, ditto the manifold, especially the intake.



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