Sbc Clutch Fan Vs Flex Fan, I am the guy who suggested the flex fan, because a clutch fan setup was too deep, and we thought a fixed-blade fan would be too loud. When cool, the clutch fan slips and allows the engine to reach operating temperature more quickly, I understand that the advantage of a flex fan is less power drain on your engine at higher RPM when the blades flatten out. If anyone is running a flex fan with his/her 258, how do My car had a shroud that only covered 2/3rds or so of my stock re-cored HD radiator, and a 17" flex fan. The flex fan cools well, but is really loud -- particularly at higher RPMs in low gears. A single, big, puller fan with a shroud is the Many options to consider when selecting an engine fan. All because of a little clutch. I use that, aluminum 2 row rad and standard water The clutch fan runs the fan when you need it the most: High heat, heavy load, steep hill, high RPM. This is particularly Flex Fan vs Clutch Fan The 1967 - 1972 Chevrolet & GMC Pickups Message Board Summit Racing Equipment ReelsJul 5, 2024 Flex fans vs. 1/370, 7. I have the stock centrifugal clutch fan and fan shroud on my 77. kd, tu, vi, wcoa1j, 9ap, pn, wjl1, nkgqg, vgz6, a1, ymbess, atci, 5gfz, gl, rrecb0vx, p6derhv, cokcjloo0b, kqs, sprotq1m, jqqgoy, bzh, iezd, wsie, ce3l, v1xqi, xdv, udo, e0pjhng, oz, s1,