351w/ 427 stroked...tearing up distributer gears - Ford Mustang Forum
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post #1 of 5 (permalink) Old 03-20-2017 Thread Starter
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351w/ 427 stroked...tearing up distributer gears

I have a 351w stroked to a 427, anyone out there have any issues or heard of any issues with tearing up distributer gears? I have in the past with a stock block not stroked yet and to stop tearing up the gear on the cam went to a brass gear then a carbon composit. I built this stroker Windsor about 5 years ago with an aftermarket block & only ran the carbon composit gear, but still tear up gears. I know they are made to wear out but sometimes is quicker than others depending on how hard I run the car. a stock oil pump, 10w 30 oil, gears mesh well, drilled a tiny hole in plug above cam to get oil spray rite on gears, not sure about cam walk. looking for info if anyone heard of this? cam shim kit?

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post #2 of 5 (permalink) Old 03-20-2017
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Have you checked your oil pump drive for clearance? Could be straining the distributor.

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post #3 of 5 (permalink) Old 03-20-2017
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Sounds like the specs. are wrong on the dist. gear. I've never had a single gear failure using the stock measurements for gear placement. And I've routinely used cast iron gears, high volume oil pumps, and Mobil 1 15w-50 synthetic oil . In fact, the gear on my last build showed no wear after 80,000 miles ( on my last '66 Shelby) using the listed parts above.

No, I don't think you should routinely expect the gears to wear out.

PS. if you are using a roller cam, then a steel gear is called for, otherwise use only iron gears with a flat tappet cam.


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post #4 of 5 (permalink) Old 03-21-2017
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I am not as familiar with 351s as I am with 302's (5.0's), but with them, your cam's gear determines whether you need a steel or brass gear for the distributor. 5.0 HO type (roller) cams usually require a steel gear, and will eat brass. Fortunately, the gears aren't hard to swap on distributors.

I'm guessing it's exactly the same situation with the 351.

I'd call your cam manufacturer and ask them, just to be sure.

(looks like Zray beat me to it! )
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post #5 of 5 (permalink) Old 08-16-2019
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The Mustang shop found the distributor gear on my 347 Stroker engine was brass and was worn and causing excessive timing play. My engine has a roller cam as well. The distributor gear was replaced promptly with a steel gear. One of my many surprises with this car.
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1966 Mustang w/ 347 Stroker engine
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