It seems to me that if you don’t have a shroud covering the entire radiator core, then you are not utilizing the entire radiator.

Found this on summit racing.  Looks like it may fit my application.

Spal huh? I don't know how their fans perform, but I had their power window kits for a while until one failed. Could not find another anywhere as they apparently discontinued making then.

BobE wrote:

RTM - regarding the shroud, this appears to be for the original width radiator.  I thought you were going with the 24" wide radiator?

 
Based on the ACP core opening measurements this shroud almost fits that opening perfectly. 

Steve69, I never thought about trimming the contour fan down.  I don’t think it would take much to trim it down to get the clearance I need.  Maybe I’ll buy one from a pull it yard and see what I can do to make it fit.   

Glad I posted here.  I really was about to order the fan.  Lol

The fan doesn't necessarily have to be centered if moving it up/down or to one side gives you the clearance you need.  Building a shruud is pretty easy.  I made mine from 1/8" aluminum plate and a perimeter frame made from 1"x1" angle.  4 more pieces of 1x1 used to make mounting legs, and its riveted together.  I painted it semi gloss back and it pretty much disappears against the black radiator. 

RTM wrote:

TKOPerformance wrote:

The fan doesn't necessarily have to be centered if moving it up/down or to one side gives you the clearance you need.  Building a shruud is pretty easy.  I made mine from 1/8" aluminum plate and a perimeter frame made from 1"x1" angle.  4 more pieces of 1x1 used to make mounting legs, and its riveted together.  I painted it semi gloss back and it pretty much disappears against the black radiator. 

 
If I use a single fan then I have roughly 5” of clearance by the water pump pulley. For the price of the shroud from Summit, I figured it would be the easiest way to go and not far from what I would spend in material anyways.

It’s the dual Contour fan that is my issue. It is roughly 3.3” thick and it’s right at the location of the tensioner on my motor. I think the blue bowl is roughly 3”.

Ah, I would just do that then.  You can probably sell the Contour fans and offset your costs too. 
 

RTM wrote:

If I recall I need at least a 1/4 more of clearance. 

Can't ya shift the contour side-to-side a dab to miss the pull-ese ?
(Sorta like the Tupperware shroud though !!)
I don't have 'a-dawg-in-this-fight' butt.....seems like Tubo & friends used the contour set-up...
6sally6
 

I have over 5” of clearance at the water pump.  It’s the CVF tensioner that’s causing the tight fit where the blue bowl is.  When I used the online drawing for the contour fan it has the thickest point sitting right at the tensioner location.   I think I may just pull the trigger and order the contour fan and see if I can make it work.  Not sure I can move the contour fan side to side, the tensioner is actually inline with any side to side movement of the fan.   

I’ll look into the SN95 fan before I order anything. 

The blue bowl is from a sterile procedure tray from the hospital.  I get sterile blue towels to use in the garage and other things they just toss in the trash.  Nothing comes from a dirty table/tray.  I repurpose a lot of stuff from the hospital.    Lol


sweet thames run softly spencer

I have about 3/8" clearance between my single Spal electric fan (16") and the water pump pulley bolts (V-Belt).
My radiator core is 2-1/4" thick, from the mounting flange.  The tank overhangs this dimension a bit, but it doesn't impact the are of concern. 

I removed a 1/4 from the shroud and the thickness part sits just above the bolt head on the tensioner.   I think it’ll work. 

RTM wrote:

Well I need more clearance than I thought or had hoped I would need. Do I need this resister piece on the contour fan?

I have used the Contour fan on 2 projects, and I love them, if a belt driven fan won't do.  I think you want the setup as close to the radiator as you can get it, and as sealed to the radiator as you can get it, which will make sure the fans are pulling the air through the radiator.  The resistor piece is where you get the high & low speeds, IIRC.  In an earlier post, I believe you were contemplating running only one fan for lower temps.  I'm not sure that is a great idea.  If only one fan is running, the air the running fan moves will be flowing past the other non-running fan, which has less resistance than pulling air through the radiator.  I think you want to leave the resistor in place, and run both fans together for both high and low speeds, which will maximize the flow of air through the radiator.

I have observed your build, all along, and you have WAY more knowledge & skills than me.  I will say that one of my contour fan setups was on a warmed up SBC in a first gen S10 truck where space was definitely an issue.  I went through a few iterations of fan, shroud, & radiator combos until I found a combo that reliably kept it cool when auto crossing.  The last attempt (because I found one that finally worked) was adding the contour fan to the big Griffin radiator I added in a prior attempt.

If you get the contour fan to fit, your next challenge will be finding the proper way to (reliably) control the fans.  Start another post for that. LOL  I have some opinions on that, too.

TimC wrote:

RTM wrote:

Well I need more clearance than I thought or had hoped I would need. Do I need this resister piece on the contour fan?

I have used the Contour fan on 2 projects, and I love them, if a belt driven fan won't do.  I think you want the setup as close to the radiator as you can get it, and as sealed to the radiator as you can get it, which will make sure the fans are pulling the air through the radiator.  The resistor piece is where you get the high & low speeds, IIRC.  In an earlier post, I believe you were contemplating running only one fan for lower temps.  I'm not sure that is a great idea.  If only one fan is running, the air the running fan moves will be flowing past the other non-running fan, which has less resistance than pulling air through the radiator.  I think you want to leave the resistor in place, and run both fans together for both high and low speeds, which will maximize the flow of air through the radiator.

I have observed your build, all along, and you have WAY more knowledge & skills than me.  I will say that one of my contour fan setups was on a warmed up SBC in a first gen S10 truck where space was definitely an issue.  I went through a few iterations of fan, shroud, & radiator combos until I found a combo that reliably kept it cool when auto crossing.  The last attempt (because I found one that finally worked) was adding the contour fan to the big Griffin radiator I added in a prior attempt.

If you get the contour fan to fit, your next challenge will be finding the proper way to (reliably) control the fans.  Start another post for that. LOL  I have some opinions on that, too.

Us a Autocoolguy controler and you will have NO Problems