Comp 921's vs Patriot Golds spring force test results
06-07-2008, 02:28 PM
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Comp 921's vs Patriot Golds spring force test results I picked a single spring at random from a new set of Patriot Gold's and Comp 921's. I brought them to a local engine builder who has a machine the tests springs and print out the collected data. I snapped a pic below of the sheets. This is not a brand A is better than brand B thread just putting this info out there. They were tested on the same machine one right after the other so a true apples to apples comparison. I'm sure there is alot more to a springs quality and durability than spring force numbers alone.
Patriot Gold
Comp 921
Patriot Gold
Comp 921
06-07-2008, 03:55 PM
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Both were brand new, the Comp had a slightly higher average spring rate and a bit more clearance before coil bind. The comp's advertise 135#'s@1.770 and this test observed 139@1.760 (closest measurement in test) so that was very close. The Patriot was right on the money as the advertised 135@1.800 came in at exactly that. After that just as Vettenuts stated the Pats seems to be a bit stronger than advertised and the Comp a bit weaker.
