fan clutches

[secretagent]

I;m installing a Downey aluminum rad in my 40. I read somewhere on MUD that a 7-8 blade fan from a big block chev would be the best fan to use to assist in the cooling. I bought one at a wrecking yard that has a clutch on it. What is the benefit of a clutch and how to I test it to see if it's functioning properly. Also do I still need a shroud with this large fan?

I've done a search and am still not clear as to where the fan should be placed in the shroud. Not in the shroud at all, only a little inside the shroud????which will give the best results.

Thanks, Greg

 

[Degnol]

I think a shroud is very important, especially if you crawl. The clutch will save you some HP as it requires less power below a certain temp. Kinda depends on your application. How do you use the truck?

Ed

 

[cruiserbrett]

x2

A shroud is very important. Regardless of radiator, I think a fan shroud is crucial. I made one on my v8 conversion, and prior to it would run about 205ish around town, but dropped to a rock steady 180 around town.

 

[Degnol]

I've done a search and am still not clear as to where the fan should be placed in the shroud. Not in the shroud at all, only a little inside the shroud????which will give the best results.

Thanks, Greg

Dunno. I've heard what Downey Jim says about having the fan positioned outside the shroud....that makes no sense to me, but I am no expert. Currently I have my fan about 1/4-3/8" inside the shroud. The stock core support gives some adjustment...like maybe 7/8" to the fore-and-aft position of the radiator/shroud.
Sorry, but I run a 2F and know nothing about V8 40's


However I do love my Blackwater polo shirt

Ed

 

[Hobbs]

However I do love my Blackwater polo shirt

Ed

Uuuhhhhhh..... what?

 

[Degnol]

Uuuhhhhhh..... what?

You heard me......."I love my Blackwater polo shirt(s)"........If I tell you any more I'll have to.....you know

Ed

 

[donny paradise]

You heard me......."I love my Blackwater polo shirt(s)"........If I tell you any more I'll have to.....you know

Ed

At this point you're better off wearing an O.J. Simpson jersey

 

[secretagent]

I still wear mine often along with other items. I love the controversy that it stirs up, especially around here with all the granola eaters.

I'm glad your enjoying it.