I have the Flex-a-lite 6719 aluminum 6 blade fan in my Regal with a 355 SBC along with a new thermal clutch and with a Champion aluminum radiator it runs 180 (thermostat temp) all of the time.
7 blade fan
- Thread starter Rudy913
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I stole my 7 blade from my 455 sqaurebody suburban.
It does well, HD clutch, new champion rad, all that fun stuff. Shame I can't use it tho with my setup. Too much weight hanging off the aluminum water pump the buick 350 uses.
It does well, HD clutch, new champion rad, all that fun stuff. Shame I can't use it tho with my setup. Too much weight hanging off the aluminum water pump the buick 350 uses.
I had been using a 7-blade stainless steel Hayden flex fan for many years. It really seemed to keep the engine running at a nice temperature. However, we all know flex fans are noisy as hell.
I'm now using a Hayden HD fan clutch and 7-blade Monte SS fan. I like it much better.
I'm now using a Hayden HD fan clutch and 7-blade Monte SS fan. I like it much better.
7 blade fan is a heavier rotating mass than needed and wasting hp. Cruising at highway speeds you should not need the fan and a 7 blade interferes too much with the air flow through the rad. We used a mechanical 4 blade on a G body circle track car and that car ran hot but never more than 240 degrees during the race. The car was chipped at 6200 and when running in traffice there wasn't much air coming through the rad but the 4 blade fan did it's job.
I am curious as to why it has to be 7 blades when clearly there are other options with less blades.
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