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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Board

Re: Oliver 88 puller


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Posted by Christopher S. on July 10, 2013 at 19:01:28 from (67.234.51.107):

In Reply to: Oliver 88 puller posted by 1949 88 puller on July 10, 2013 at 12:11:33:

You will have to do a little research on it but I THINK that 91 octane is good for 10:1 to 10.5:1.

http://www.rbracing-rsr.com/compstaticcalc.html
Enter all of your engine data in this formula to find out your current compression ratio.

http://southeast.kctcs.edu/en/Academics/Programs/Automotive_Technology/Automotive_Formulas.aspx
Use this link to access many good engine formulas. There is a formula a good ways down the page on how much to mill off.

We built two 77 motors that are quite similar to what you are doing. My motor is slightly different than my brothers but they both are pretty similar Horse Power.

Some thing I would do: Get friendly with a die grinder, carbide burrs and stones. Before sending out the Head I would match port your manifolds. I would also clean up the combustion chambers to remove any casting roughness.

I would use the Super 88 Valves. I can't say as though it makes a huge difference but it can't hurt.

The 1650 carb will have a pretty big throat compared to the vertical section of the new intake manifold. That can be bored out to match. There is a fellow with the handle of chucksoliver77, I believe he had an extrusion process on his done where they forced sand through it and it opened up the runners and everything.

I would send the cam to get reground. My brother and I both used bullet cams. You will want to talk to Sonny Daniels. I believe it was around $260 when it was all said and done. Some guys will tell you that you need to know all the info on what to order as far as your durations and degrees, I am sure there is merit to that and you may be able to fine tune your engine. On both engines we just told Sonny what we were building, how we were running it and the parameters and he said I've got just the thing. I've been happy.

I've been reading recently that guys are sending their lifters out to get machined flat. It sounds like a good idea, I'm not sure why I didn't on mine.

I would run 10% over on the RPMS. These motors love RPMS.

If your near a junkyard snatch us a set of rocker arms from a Super 88. I believe they will be a bolt on application. There is no performance gains here but I think they oil way better than the fleetline style.

Head Gaskets: we both used copper head gaskets that were .030 Thick. I got mine from Hussey Copper who I think is now out of business.

I don't claim to be an expert or authority on engine building by any stretch. Feel free to pick and choose any of the above information.


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