Tell us a little about your vehicle and we might be able to give you a less costly alternative.
Above 30/35 MPH, you don't need a fan at all, so it's all about low rpm, low speed cooling. This is where an OEM-type system works best. It's about the diameter and pitch of the fan blades and a good shroud that fits close to the radiator core and completes a 360-degree circle around the fan blades, with the fan blades half-in and half-out of the shroud opening. Also, the fan blades need to be close-fitting to the shroud hole on the diameter. An 18-inch fan with a 19-20 inch shroud hole will work just fine. The shroud hole needs to be large enough so that the blades will not contact the shroud as the motor rocks laterally on the motor mounts, but not so big that the blades cannot pull a good vacuum between the blades and the radiator core.daveid said:so would a stainless steel 7 blade 18inch flex a light fan work? My only question on the mechanical fan is, If my heat problem comes when im idling, isnt that not going to work as well since my rpms will be the lowest then and therefore the fan will be spinning at the slowest it can?
Hey dude, you'll never p*** me off voicing your opinion. I'll fight to the death for your right to say what you think, unlike some other narrow-minded people on this board..... :boxing:NEW INTERIORS said:..Sorry.. I'm not by all means trying to get in a pi**** contest.....Tech and Vince if this p**** y'all off I'm sorry.. But this forum is about info.....Like I said.. I don't want anyone mad..
I do fully understand tech.. :thumbup: I'm glad you understand where I was coming from... Thanks..techinspector1 said:Hey dude, you'll never p*** me off voicing your opinion. I'll fight to the death for your right to say what you think, unlike some other narrow-minded people on this board..... :boxing:
There are those who like Chevys, there are those who like Fords and there are those who like other make cars/trucks. There are those who like mechanical systems and there are those who like electrical systems. That's what makes the world go 'round. If everyone was the same, it would be a very dull life.
daveid said:also, would a 3/4 circle shroud work or should i only get a full circle one?
You don't need both.. :nono:American Muscle said:If there is enough space can a electric fan and mechanical fn be used at the same time?
Yeah, it's possible to do, but is not normally done. Choose one or the other and optimize it for your application. I've seen some fellows install an electric pusher fan in front of the radiator while using a mechanical system behind the radiator. Problem with that is, the pusher fan blocks the flow of air at higher vehicle speeds where you don't need a fan at all.American Muscle said:If there is enough space can a electric fan and mechanical fn be used at the same time?
Any boneyard that has an old big block equipped car, station wagon or pickup truck (396/402/427/454). You can usually rescue the shroud if the motor is gone. If the motor is still there, you can also rescue the fan, fan clutch and any brackets you might need (AC, PS pump, alternator, etc). Tall deck 427/454 motors such as found in schoolbuses, dump trucks, etc may have different brackets, but the shroud/fan/clutch should work on your short deck motor. Early 70's Impala station wagons with a 402 used to be my favorite find.daveid said:Thanks guys for all the info. Vince, I do not have a fan shroud and just started looking on where to find one. You know a good place to buy one?
Tech, I looked for a 7 blade steel fan but i kept coming up with a flex a lite stainless steal fan. Do you know a good place to buy the oem style ones?