Has any of you ever tried or seen one on a FD
i mean those mentioned in Corky Bell book

 

Something like that

(it's only a draft)

 

i really dont see that helping much, you have to think about pressure loss, and think about the fact you will probably cool the air in the front half, but once it hits the rear half you will start to heat it up again because the lack of air, and heat soak from engine, my .02.

 

Now that’s pretty interesting. My mechanic is working on a radiator that is dual pass but not designed like that. In his the water stays in the same core, it just passes twice through it. Once from the top then once from the bottom. I think this idea would eliminate the problems with your design prototype. I agree with Godzilla. I think yours will not get enough air for the second half. The pressure loss is debatable and probably has more to do with the design of it.

Hopefully I can get my hands on the dual pass radiator to see if it is truly more efficient. He only has one made. The only problem is that he has to develop a fan harness for it to work; it works off one huge fan instead of the stock system. That shouldn't be a problem, I can't wait until it goes into production.

Garrett

 

Two pass radiators are nothing new?

 

Thickness does not help as much as frontal area. Your basically increasing thickness with your design. I'm sure it would work but you'll need 3 custom endtanks and I'm not sure it is any better (maybe worse) than a Med or Large SMIC.

Jeff

 

Oh..I see...you thought I was implying in my description that this was something new. Well...it is something new on my car and I think for RX7s in general. That's why I detailed how it works. I'm not sure how many companies manufacture one specifically for the rx7 but this one will be worth a try. Do you know of any made for our cars? I would love to compare other dual pass radiators.


Garrett

 

I think I'll do an experiment end try this IC
I have also the opportunity to measure flow and pressure loss so i'll let you know

 

Okay, so a bunch of people have identified some downsides (pressure drop, cooling performance, cost, complexity). What are the positives to offset all these problems? So far this idea doesn't make any sense to me.

-Max

 

Other than something to occupy time, I fail to see any positives.

 

I don't see any either. Like someone said basically you just made a really thick core, but went to much more effort to do it.

 

I can't offer much support, but I believe it would be more effective than a single pass. Here's why: the biggest factor in heat transfer is the difference in temperature between the cooling air and the charge air. A setup like this would go to the back IC first, when it is hottest; the heat transfer would be good because, even though the cooling air has been warmed by passing through the front IC, the differential would still be high. The charge air, now somewhat cooled, passes through the front IC, where there is still a differential between the charge air and the ambient air passing through the front IC. If the in/out pipes are both on the top or the bottom, and the 90 degree turn had to be made anyway, how much more resistance would a well designed core have than a 90 degree pipe?

 

its ok if its a water to air intercooler, if not go with a fmic or v mount