Wanting to upgrade my Radiator for my APS TT Z. I wanted some suggestions from other FI people on what to do to increase water cooling.
Should I replace the radiator and/or remove the thermostat?

If I replace the radiator, what will give me the best performance for the money:
1. Stillen
2. ARC
3. Blitz
4. PE
5. Koyo (my shop has told me they have had many failures with Koyo on TT Z's)

Thanks

 

I'd say ARC might be the best, but defniitely not for the money. ARC stuff is highway robbery with a capital R. Stillen is highway robbery too, but to a lesser extent.
I would check and see if Griffin makes a radiator for the Z yet. They make some nice stuff.

 

no real need for one, unless your gonna be tracking...but its a good way to prevent a prob.........I would sya the griffin but i think it larger than the stock

 

I thought Koyo was quite a reputable manufacturer of radiators.

 

I do track my car, and I live in Southern Georgia, so it gets hot here in the summer, and until now, have to stay way from the track when during the summer.
I thought the same of Koyo, yet the Z specific shop I go to says they experienced problems with them (not the install, but actual failure of the radiator).

 

well than def get one..............didnt know there we so many actually ...........

 

The Koyo has had fitment issues with APS cars in the past although I have heard they fit right in as well. PE seems to be a good one. Stillen as well..

 

Have you tried just replacing the thermostat?

 

I have the PE and it works fine especially here in the FL heat. It's a direct fit and no cutting of fans or shroud is required. I had to switch a stock radiator cause it was losing water under pressure. A breather tank is a good idea also. It will purge any air bubbles you may have in the cooling system.

 

I have the Koyo on my APS TT setup. Fitment is great, basically direct drop in. I haven't heard about isssues with them, but maybe I am just talking to the wrong people. A local to me just bought a stillen for his Z (N/A) and claimed it was not direct drop in. Don't know if that is true or not, but what I do know is he paid like 600 bucks for it vs the 350-400 the koyo costs.

 

Not yet, was thinking of removing it completely since there are no such thing as Winter in Southern Georgia!

 

Was planning on getting a breather tank. How has the PE performed? Did you notice a big improvement in your temps?

 

Zivman, how long have you been running with the KOYO, cause thats the one i'm looking at getting, but i dont want to find out later that it wil fall appart.

 

On the APS kit the turbos are water cooled, right? Does this run off of your engine coolant?

 

I have only had it on since Nov. I put about 1500 miles on the car since then. MN and winter and all

Zippycar has had this on his car for a while and tracks the heck out of it:
LINK

 

There is no water ran to the APS turbos. APS only connects the oil to the turbo's and this actually cools the turbo's. I have installed an oil cooler for this reason. Yet, since I am making twice as much hp than stock, I need a radiator that will take all that extra heat away from the engine.

 

I think you'll find a set of slim fans will help too (high cfm ones that is)

 

I thought the APS turbos were water cooled aswell. In fact im almost 100% certain they are.

 

+1

 

Just wondering, what does your dyno look like. Since your torque is much higher than your HP, I am assuming that you Torque must come down at higher RPM's?