Ford Muscle Forums : Ford Muscle Cars Tech Forum - View Single Post - 393w build suggestion for valve springs
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post #4 of (permalink) Old 02-07-2017, 10:17 AM
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Join Date: Aug 2015
Location: Anaheim CA
Posts: 461
Re: 393w build suggestion for valve springs

I went with a spring from Competition Products that has 150 on the seat and about 380 open. 1.550 dia single spring and used a ti retainer. 7,000 rpm trouble free. I tossed the box years ago or I'd give you the part number.

Experimental Ford parts collector.
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