G.M. 4 blade fan?

[jrkracing54]

Where do I buy an actual G.M. 4 blade fan? I don't want the afco knock off fan. Do I have to get it from a dealership? Any help would be greatly appreciated. John 1*

[lazermod3]

Where do I buy an actual G.M. 4 blade fan? I don't want the afco knock off fan. Do I have to get it from a dealership? Any help would be greatly appreciated. John 1*

"YES"go to your local GM dealer.

[perfconn]

Not the same fan.GM 405442 is 19 inch.Pitch is probably different like the AFCO is.

[joedoozer]

What is the "love" with the GM fan over the AFCO? I thought the only difference was the pitch of the blade. Don't you want to use the smallest, least pitch fan that will adequately cool the engine?

[perfconn]

The GM 405442 has proven over many years to get the job done in circle track racing.Yes there may be sitiuations like low hp crates or alcohol applications that you don't need as much fan.I have seen many guys try the AFCO and have overheating troubles and then go to the GM and solve their problems.The GM 405442 has gotten really expensive but the CV Products 19 inch is an exact copy with some improvements and is less expensive.

[dirty white boy]

www.performanceautobody.com got the good fan at a fair price...

[perfconn]

18 inches and 19 inches are not the same unless you can't read a tape measure.

[MasterSbilt_Racer]

What is the "love" with the GM fan over the AFCO? I thought the only difference was the pitch of the blade. Don't you want to use the smallest, least pitch fan that will adequately cool the engine?

I'm with you on this. Don't fix it if it isn't broke. Don't run a mult-pass radiator either if you don't need it.

Rob the least amount of power and use the lightest parts possible to still cool your engine.

[jrkracing54]

I currently have the AFCO fan and down here in Florida the temps are getting up there. My engine is starting to run a little hot. I was told the GM fan would drop temps up to 30 degree so that's what I'm looking for. If your engine runs o.k. with the AFCO fan then I guess you are lucky.

[Rayburnt1]

I'm with you on this. Don't fix it if it isn't broke. Don't run a mult-pass radiator either if you don't need it.

Rob the least amount of power and use the lightest parts possible to still cool your engine.

What are the disadvantages of a double pass vs. single pass radiator? Horsepower robbing?

[MasterSbilt_Racer]

More fan takes more horsepower to turn. More radiator is heavier and holds more water at 8 pounds per gallon. It also costs more.

[stockcar5]

does a double pass radiator hold more water than a single pass radiator of equal size? if so how much?

[racinjj]

does a double pass radiator hold more water than a single pass radiator of equal size? if so how much?

They hold the same amount of water. The tank size is the same, they are just seperated top and bottom.

[MasterSbilt_Racer]

When I went from a 31 to a 27 the difference in the water it held was almost a half a gallon. The 27 only has 4 inches shorter tubes side to side....

I saved at least 20# by going to a small thin one on my late model. I think it was a 27" single core. I had no trouble cooling plenty of engine and I know someone using the same radiator in a super right now.

[stockcar5]

They hold the same amount of water. The tank size is the same, they are just seperated top and bottom.

i figured that. i was just trying to figure out what master was saying about not using a double pass radiator. i dont see a double pass weighing more OR costing any horsepower.