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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
Show Parts for Model:

Oliver 88 valve size

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dcpuller

03-05-2010 02:35:05
71.82.165.172



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Hey, I was wondering the valve size for a Oliver 88, super valve size? Have the domed M&W's and a regound cam and want to get the most hp I can. Would a larger valve than the super be to an advantage? Thanks, Dave S




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johns

03-05-2010 19:29:45
69.163.19.7



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 Re: Oliver 88 valve size in reply to dcpuller, 03-05-2010 02:35:05  
stock valve sizes:
88 intake-1.344, exhaust 1.156
super88 intake-1.5,exhaust early-1.312,late 1.156
880-1600 intake 1.5, exhaust 1.156
The early supers had some hard starting issues, that is why they went back to the smaller exhaust valve. I think a good set of valve seat set at the right spec would've cured this problem. Not sure either why they used such small valves, but try to remember that an 88 was a big tractor in its day and 45-55 hp was pretty impressive. Especially for the guys that recently still used horses.

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J. Schwiebert

03-06-2010 17:41:03
209.173.169.171



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 Re: Oliver 88 valve size in reply to johns, 03-05-2010 19:29:45  
Your specs are for a diesel, he has a gas tractor.



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Mike Bock

03-05-2010 18:17:54
75.205.209.248



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 Re: Oliver 88 valve size in reply to dcpuller, 03-05-2010 02:35:05  
yes it would help alot idont know why oliver put such small valves in their engines some people put chrysler valves in them dont know witch ones though big block chrysler has 3/8 stem though i have a320 it has 2 inch valves in it, it runs real strong



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