this may be old as i havent browsed their website in a long time but have a look. their project car seems real interesting.

http://www.kdrotary.com/innovations.html

 

should be interesting.

 

There is a guy on here that has his radiators setup that way (prob where KDR got the idea). He said his water temps were much lower that way but I just cant see it, the hole in the bumper to let in air is soooo small. It just seems like its not enough.

Should be interesting to see them make 500rwhp on 94 pump, thats my current goal. To my knowledge NO one has made that much on pump gas yet. I wonder what turbo they are going to run?

 

No one?

 

500rwhp and pass smog? They gotta be kidding! You'd have to run a cat to pass smog without resorting to illegal ways.

 

No one!
I second that.

 

Wonder where they'll put the oil coolers if the dual radiators are in those locations.

 

I was also wondering where the oil coolers will go. The 2 small radiator design works great on formula cars but they have huge ducts feeding air to the radiators, this just doesn't look very effective.

 

i was wondering the same.

This might be better if you had something with an huge opening like the Mazda speed GTC peice etc.

 

I started to think maybe they could put them in the main opening of the nose where the radiator would normally go, but I imagine in order to turn 500hp, they'll put a large front mount IC on the car, and that would block airflow to oil coolers behind it. Maybe they'll do a modified V-Mount IC with a large custom oil cooler where the radiator would normally go. Will certainly have to keep checking up on this, I'm very curious to see how they do work this out.

 

They may add to the amount of oil it carries to reduce the thermal load on the lube system. Or put in a water/oil cooler and put the load on the cooling system.

Definitely putting the radiators in direct air flow is vital to good transfer - I've always been skeptical of putting a radiator and intercooler in-line.

Oh, and they can't legally pass smog in PA with anything not stock since pre-96s only have visual inspection, gas cap for emissions check. I guess they're just saying they'll run a high-flow cat.

Dave

 

im sure he means on a 13b rew. nice try though, lol.

 

Has anyone been there recently?

 

I was there in June when I dropped my car off. Only thing they mentioned about the project car was it was going to run a Microtech and I should do the same.

 

Well, obviously I was speaking of 13b lol.

 

I have posted about the dual radiators previously. I have never seen temps exceeding 87C on my PFC. I have 2 oil coolers mounted up in the nose out of direct air flow; while I don't have an oil temp gauge, my oil pressure will run near the max when revs climb, no matter how hot it is or how hard I run. I'd like to lower them into the air flow, though. Kd, to the best of my knowledge, plans a front mount, so they may place the oil cooler the same as mine. I would like to add I think a front mount is a mistake; with the radiators out from under the hood, there is very little heat soak, and a "standard mount", with shorter pipes, runs very cool (PFC air temps 5-10C above ambient).

 

I would imagine they would set the ic where the radiator usually sets in a fmic setup. Basically right up at the front of the engine bay where it catches all the air. That would pretty much be just like a fmic but you'd have shorter/straighter pipes and you dont have to pull/cut the bumper and supports, ect. Then you could mount the oil cooler(s) right in front or behind the IC

 

Or...run a V-mount setup replacing the radiator with long oil cooler via some of the aftermarket 911 designs. Just wondering how exposed those KDR mini-radiators will be to road debris. One would almost have to use screens over the openings. Just take a peek at a stock oil cooler with more than a few miles on it. They're usually pretty ugly. It's an interesting idea though. If anyone ever has a chance, check out the oil cooler packaging on a 996 in the nose of the car. The position leaves room for brake ducts and also reduces frontal area for higher top speed.

 

Interesting, they don't like the pfc anymore? I considered running a microtech, but didnt hear much good about it.

 

i wonder if two of those mini radiators together is the same size as one from Koyo, Fluidyne, or knight racing...

 

Size is only one of many variables in cooler design. If for example you allow the air to get heated more as it passes over the cooler, you can get away with a smaller unit. Or you can change fin configuration, number/size of tubes, coolant flow rate, and air flow rate.

Since these radiators are not sharing their air with the intercooler, they have more capacity available. In concept it's good since the water and intake air temps are a bigger problem than oil temps on FDs.

Dave

 

500 rwhp legal daily driver is a great project for some shop like KDR to try to tackle. I'm all for it .

 

Mmm...from the starting of this post , i can see that the dual radiator set up is going to be a point of heated debate . I agree with dgeesaman , that even those the set may not carry the capacity fluid or size over stock. Their location however makes makes up for it with the air flow going thought the duals rads . The diffcult problem would be the 500rwhp they're shooting and passing emissions . It is gonna be a up hill task ...hehe... damn i can't wait till they finish

 

500 RWHP.....

Guys on the 2nd Gen NA forum do it all the time. Just ask them!!! LOL

 

yo rallimike. has KD contacted you about your rad setup? I keep pestering them saying i want to go for it but they either don't respond to that part of my email or they say not yet. i'm gonna bug em again today. that setup is the super excellent #1 cooling system. finally the air being blown into the engine bay won't be filtered through a rad with 180+ degree coolant flowing through it. right there its worth it. add to that the short pipes rallimike mentioned combined with being able to ditch your smic duct with a tiny scoop in the front...good stuff.

rallimike can add more about the physics behind the dual rads but as I understand it you don't add up the volume of the two rads to get the cooling capacity you multiply it. the first rad knocks the temps way down and since the second rad is seeing greatly reduced temps to start with its job is much easier. also, the coolant will shed some heat as it passes through the piping from one rad to the other. one concern that KD brought up was the water pump being able to push coolant through all this but apparently its not a problem. i've been really enthused about this idea since i heard it, glad to see interest being taken.

also with this setup those open cone filter intakes (like pettit) won't be hot air intakes anymore. ideal for those sticking a filter right on the turbo.