[HWYSTR455]

Couple things. First, the wizz-bang cheap fans/shrouds are usually not very good, the shrouds/fans are too close to the radiator, and only draw the circumference of the fan(s).

Good example is in that link that states the 'Cold Case fans outcool the Champion', the wizz-bang shroud used with the Champion is junk, and not a fair comparison.

As long as the shroud is properly designed, and covers as much of the core as possible, you will get max cooling/flow/cfm from the fan(s) installed. Compare combined fan cfms, and pick the most/biggest, especially for a performance application.

Also don't agree with the statement that Derale fans and controllers have a bad wrap. I use them religiously and have never had a problem. They make a wide variety of sizes and shapes, and the new PWM controller works great.

I say definitely run a controller, for a number of reasons. Electrical load 'shock', alts last longer, fans last longer, and cooling is efficient. I say only run PWM type controllers for the same reasons.

The Derale PWM Powerpack fans are great, have the controller built in, and makes for a very clean package. For your core size, it's a little tricky, since you need to look at the top and bottom to figure out if you can use the one large size of 27 x 18. It's ok if the shroud contacts the top & bottom (1/2" top/bottom) frame of the radiator as long as you can get it to seal right. That's what I plan to use on my 'bird, but if you're concerned, you can drop back to the 26 3/8" x 16" setup.

https://derale.com/product-footer/el...709-753-detail

Thing about 2 fans compared to a single fan. Real estate up there gets tight, and with a single fan, centered, the fan at it's thickest part, usually the fan motor, is lined right up with the water pump. With two fans, there is more room there.

I mounted my shroud on my A-body using tread-serts into the top & bottom frame of the radiator, with brackets, worked great. Plan on doing the same with the 'bird.


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