Mines is over cooling on highway speeds

That's a thermostat issue, not a radiator issue.

So is Mine. What temps is your at? What row are you running for your cooler?

I would be interested in the condenser-less version especially if it had built in oil-to-water heat-exchange capacity. Maybe there are a couple of other racers on here that have ditched their A/C or are getting ready too. Travis? Mike?

On the hot days my water temps (and oil temps) have been way too high. My current oil cooler blocking the radiator doesn't help. Am considering some hood vents to increase air flow through the radiator, do you think these make a significant difference?

From 190f cools to this low on the freeway with 45f outside temps

http://i40.tinypic.com/2r5q7br.jpg

We can supply our Competition 70mm radiator with or without the A/C condenser and we have a huge heat exchanger that can be used to cool either engine oil or automatic transmission fluid.

Here is a link to it on our website: GTM Motorsports*::*COOLING SYSTEM*::*GTM 70MM Competition Radiator With Heat Exchanger That includes the A/C condenser, but it would obviously be less expensive without it.

I'm working on the press release and should have it done tomorrow. In the meantime, here's a couple pictures:


We also have a high output fan shroud and fan system available as well to increase airflow at low vehicle speeds (traffic, low speed corners on the track, etc.).

GTM Motorsports*::*COOLING SYSTEM*::*GTM H.O. 14" Dual Fan Kit For Z34/V36

I know we have a thermostatic kit on the way to you, but in the meantime, you could always cover the oil cooler if you are concerned with the temps dropping too low.

Wouldn't the electronics box on the lower fan shroud (top picture) be better off mounted against the flat radiator portion that has no fins in-between the two fans? Odd to me to place it such that it impedes airflow given the room you have. Edit: just realized those are OEM fans so I am sure this was not a GTM design decision.

Along those lines, it's interesting to me that so much of the back is blocked off so such that air can't freely flow through. You would think that this would really impact heat exchange efficiency. Perhaps the action of the fans more than makes up for that. Very nice looking kit in any event. It is about 2x what the CSF kit costs so I am curious what the performance difference is.

Very interesting. Good price on the radiator especially if it is cheaper without the condenser, ouch on the fan shroud :)

Mike, what you recommend for a secondary oil cooling system, or will the radiator heat exchanger be enough? E.g. will it be equivalent to a normal sized Laminova unit?

What's the average temps are we suppose to be running?

The idea is was to allow an option to run the factory fans if desired. We also have an option to run a pair of larger 14" fans.

In regards to "blocking" part of the radiator, the factory shroud does the same thing. That is to allow the fans to draw air through the radiator more efficiently.

Our radiator is 70mm thick compared to the 30mm thick alternative and 18mm thick stock radiator. Running a much thicker radiator core increases coolant capacity as well as increases heat transfer. This also allows us to run a substantially larger auxiliary heat exchanger in the end tank for better oil cooling (trans or engine). Basically, the heat exchanger in our radiator is large enough that you don't even need to run an air-oil cooler on an automatic transmission...it does a spectacular job on its own.

That's what I'm planning on doing this weekend till that part comes in. Idk how much longer it's going to take to get it to me but i am being patience at the mean time.

OK, so the two questions that I think are most important are:
1. Can this radiator support FI oil cooling (assuming no Auto) without an additional air-oil cooler? You seem to suggest that, but I am not sure if that's talking stock car or FI car.
2. Where is the AC condenser? Is that the black, smaller radiator in the pictures above? And if so, where is that mounted?

1. We are going to be offering a setup that does not require an air-oil cooler on a Forced Induction car. All you'll need is the radiator with the internal heat exchanger and another really awesome piece...

2. The pics I posted don't actually show the A/C condenser. The small black heat exchanger is an auxiliary air-oil cooler (for automatics that still need engine oil cooling, or those extreme powered cars that need an auxiliary engine oil cooler in addition to the internal heat exchanger)

What? The dual 14" SPAL fan or something else. Dang it man! I'm on the edge of my seat over here. :driving:

And where does the A/C condenser get mounted? Or is it internal to the 70mm piece?