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Old 08-06-2019, 04:53 PM   #8
Pete
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Join Date: May 2010
Location: Wa.
Posts: 5,374
Default Re: Scat vs Merc crank

I have posted this before but here it is again.
When SCAT cranks for flathead Fords first came on the market, they were advertised as being cast STEEL. 2 of the vintage top fuel guys and myself went together and bought 3 rough castings and finished them ourselves to 4.438 stroke which was all the stroke we could get with the material available.
I put mine in a circle track engine running on av gas. It lasted one season before needing grinding.
The other 2 were put in vintage top fuel drag engines running on 100% nitro.
Both of those cranks broke before they went 100 ft. on the first run.
UPON ANALYZING, THOSE CRANKS WERE NODULAR IRON, NOT STEEL.
SCAT would not talk to us about it.

I would use an old style welded stroker made on a Merc crank before I would ever use a SCAT crank. I wouldn't even make a lamp out of one.
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