Author Topic: Narrow rod bearings?  (Read 9758 times)

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Offline tauruck

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Re: Narrow rod bearings?
« Reply #15 on: June 23, 2015, 01:02:28 AM »
Oil additive?. Bo, why?. :-)

Offline wobblywalrus

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Re: Narrow rod bearings?
« Reply #16 on: June 26, 2015, 12:40:15 AM »
The oil I used for many years was Mobil 1 synthetic.  No problems at all with it.  They lowered the zinc or phosphorous content to meet some new and goofy regulation or law.  In response, I brought the metals content up to where it was before by using a zddp additive.

The big end bearing shells showed a small amount of flaking after a year's use.  I did a lot of internet research and a fellow who does oil testing said that ZDDP additives compromise the lube ability of the newer synthetics.  Oil samples were sent to a lab to verify this.  Answering this post reminds me to e-mail them to get the results.

 

Offline fordboy628

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Re: Narrow rod bearings?
« Reply #17 on: June 29, 2015, 09:45:52 PM »
Here are a couple of photos of a fixture I used to use to narrow Pinto 1600 rod bearings to the Cosworth "narrow" bearing width.



It was used with a large bore 5C collet normally, or an "accurate" 3 jaw chuck.

If I recall correctly, we took off .120" off the width.    No idea what % that is.    We only did this with Clevite 77 bearings, our first choice.    Other tri-metal high performance bearings would work.    Hope this gives you some ideas.

 :cheers:
Fordboy
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