I see...but how does the half preform that's the question...I had a greddy full size running a 12inch spal before this half I installed...it never gave me problems as well even on 48 psi using a 6766 turbo

 

Maybe it is not the radiator the problem but the fan. If the fan is too small and does not flow much, it would be difficult for to keep the temp in control. From what I hear, a 12'' spal is the best option. In your place I would try to fit as thick fan as possible and go on from there.

 

You need to put the highest cfm fan you can get from spal and build a shroud for it. I built an aluminum shroud that covers the full area of the half radiator and then mounted the fan to that. The shroud is only about 3/4" thick, so air flow from the corners is not the same as in the middle, but it is way better than mounting the fan direct to the radiator. I run the koyo half and had a lot of temp issues with Pro Solo competition (run hard, stop, run hard, stop). This made a huge difference.

 

A half radiator will never work as well as full-sized. Making the core thicker doesn't make it as good as a larger, thinner core. Thinner = better cooling. Half-sized radiators are fine for some daily driving and drag racing, IMO.

 

Or this Would also work?????

since I'm not a builder..but how much temp difference did it made with and without the shroud?

 

This is golden!

 

That's basically what I built. As others have stated , it won't be as good as a full size radiator, but I have had good luck with it on the street and in solo and pro solo competition. Before the fan and shroud upgrade, I would get hot after a run mid summer at high ambient temps. After it seems to hold well. This is running about 500whp on e85.