How many cfm do I really need, would really like to run a one fan system, car is mainly for the street
how many cfm elec. fan for 403 , flat tops, mild cam
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Re: how mant cfm elec. fan for 403 , flat tops, mild cam
Is it just a drag car or more street car?
For a street car I wouldn't go less than 4000cfm.
If you want just a single fan then use a Mark VIII fan. They pull a lot of air for a single fan.
Is it just a drag car or more street car?
For a street car I wouldn't go less than 4000cfm.
If you want just a single fan then use a Mark VIII fan. They pull a lot of air for a single fan.
Re: how mant cfm elec. fan for 403 , flat tops, mild cam
Wow that much huh, anyone have a spare laying around?
Wow that much huh, anyone have a spare laying around?
Re: how mant cfm elec. fan for 403 , flat tops, mild cam
I think he meant 400cfm lol. So will you be running a stock manual pump or a electric pump on frame rail?
FE3X CLONE said:
I think he meant 400cfm lol. So will you be running a stock manual pump or a electric pump on frame rail?
Re: how mant cfm elec. fan for 403 , flat tops, mild cam
No I think he meant 4000; I was thinking closer to 2500 but 403 do run hot
Bowiemontecarlo86 said:
No I think he meant 4000; I was thinking closer to 2500 but 403 do run hot
Re: how mant cfm elec. fan for 403 , flat tops, mild cam
Nope, meant 4,000. 400 wouldn't be enough to even cool a small trans cooler.
Bowiemontecarlo86 said:
Nope, meant 4,000. 400 wouldn't be enough to even cool a small trans cooler.
General rule of thumb:
And its been my experience that a 403 doesn't run any hotter than any other Olds engine.
And its been my experience that a 403 doesn't run any hotter than any other Olds engine.
the mark VIII fans push 8000cfm, cheap electrics run more towards 4k.
for a street motor you want as much as possible, but not necessarily all the time. i prefer dual electric fans. this way you can wire one to an automatic controller to activate at a certain temp, and have the 2nd one either on manual, or on a second controller for a higher temp.
it's been awhile, but i believe i have intrepid fans in my monte. they push almost as much as the mark VIII, and you have 2fans, and 2 speeds. right now both fans are wired to come on at the same temp, on low speed, and it's overkill. when sitting in traffic i know when they turn on because i can almost watch the temp gauge drop! this is on a stock radiator, HV pump, and Evans NPG+ coolant.
for a street motor you want as much as possible, but not necessarily all the time. i prefer dual electric fans. this way you can wire one to an automatic controller to activate at a certain temp, and have the 2nd one either on manual, or on a second controller for a higher temp.
it's been awhile, but i believe i have intrepid fans in my monte. they push almost as much as the mark VIII, and you have 2fans, and 2 speeds. right now both fans are wired to come on at the same temp, on low speed, and it's overkill. when sitting in traffic i know when they turn on because i can almost watch the temp gauge drop! this is on a stock radiator, HV pump, and Evans NPG+ coolant.
megaladon6 said:
Cheap electrics aren't even close to 4000 cfm. More like 1000 cfm if your lucky. Even at that most aftermarket fans flow less than what they say they do.
My aftermarket derale setup pulls 4000+cfm and were not cheap.
Where did you get the 8000 cfm for the Mark VIII from? Just curious as I've always wondered what they flow compared to others.
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