Valve spring diameter question

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**Tommy** · #1 06-23-2019, 11:25 AM

The new trick flow aluminum double hump heads have two sizes of valve springs available, 1.460 and 1.470. I've looked at the specs on both heads and can't see a difference except for the spring. The heads with the smaller spring are more expensive and I'd like to know which spring is preferred and why.

Tommy

x33rs · #2 06-23-2019, 01:51 PM

The 1.460" spring package is a double spring (inner spring as well). Will have more seat and open pressure, however they don't list any spring specs.

The 1.470 spring package is just a single spring, no damper.

**Tommy** · #3 06-23-2019, 02:12 PM

Thanks, i completely overlooked that. Just compared specs again and I see it now.

Tommy

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Tommy (06-23-2019)

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