Visit The Dirt Forum for More Information

Author Topic:   Double Pass Radiator
Dirt Maniac

Total posts: 105
posted November 05, 2004 10:32 PM  
Is it advisable/unadvisable to use a double pass radiator for our purposes (street stock on dirt)? Also, any reason not to use -20AN hose and fittings on it?

Found a great deal on a system out of a cup car and didn't know whether to jump on it or not.

Dirt Forum Champ
Total posts: 968
posted November 06, 2004 04:47 AM  
Great deal????? Think about it, unless that "Cup" radiator was designed to be run at Martinsville or Bristol, it won't be worth BEANS in your dirt stocker. Nascar teams engineer EVERYTHING. That particular piece may have been built to run at 170mph. I have a couple of the 2 pass radiators, Afco I think, but what am I using??? A good old 27" aluminum from the TnT Racecars. Put a good fan, shroud and airbox on it and roll!!

Dirt Forum Champ
Total posts: 516
posted November 06, 2004 06:37 AM  
If its a real good deal its worth looking into, its possible that they design different radiators for different tracks but I doubt it. I dont see where the -20 fittings would be a problem.

Dirt Maniac

Total posts: 105
posted November 06, 2004 12:52 PM  
Eh, think I'll pass on it. But just to satisfy my own curiosity, I would still be interested in hearing from anyone who has used one and/or has used a -16 or -20 AN line on the top.

Dirt Newbie

Total posts: 4
posted November 06, 2004 04:52 PM  
Theres been a few guys around here running
the AN-20 lines on top they say it reduces
turblence in the water as opposed to running
a restricter in the thermostat housing.
They say it cools better don't know myself
though but right now I'm chasing them so would have to say they've got something right. hope this helps

Dirt Maniac

Total posts: 113
posted November 12, 2004 10:52 AM  
The Nextel Cup radiators are ABSOLUTELY engineered different for different tracks. There was an article in Circle Track a few months back showing the differences in the radiator design from super speedway to short track.

Dirt Maniac

Total posts: 113
posted November 12, 2004 10:56 AM  
Also without going into reynold's number and heat transfer theory, turbulent flow will transfer more heat than laminar flow will. Unless you get the -20 fittings for free, the money will produce more performance in new tires or better shocks. I love AN fittings for fuel, but on a cooling system it seems to be a bit much.

Dirt Forum Champ
Total posts: 569
posted November 12, 2004 01:21 PM  
The thing in Circle Track was just trying to point out that not all used parts work on all race cars. Some might be fine, though.

I would think that it might work, but a "good deal" on a used cup radiator is probably still more than a new regular Howe or Griffin aluminum radiator. If it works, it would be great, b/c a lot of those have integral oil coolers.

If its $50 its probably worth a try, other wise, I'd stick with a standard aluminum racing radiator.

Dirt Maniac

Total posts: 105
posted November 12, 2004 02:24 PM  
Well, the reason I was asking was because it was a C&R 32x19 double pass aluminum radiator and came with the -20 AN braided top hose with all fittings and was $25.00.

Anyhow, kinda figured that the radiator wouldn't work but wanted input on other's experiences.

Dirt Freak

Total posts: 217
posted November 14, 2004 05:58 AM  
I used one for a while and it worked fine big problem is keeeping it clean.Mine was a 4" core 28x16 I don't think there is a good way to clean the dirt out of it.The fin spacing is to tight for our needs.Called cr and was told the same thing you will need to run about 140 to get the air through it.Stick with the reg.double 1"cores single pass it do just fine with proper shroud /fan placement.

Dirt Freak

Total posts: 226
posted November 14, 2004 06:34 AM  
man where are you getting your used parts? if you can find aluminum radiators for $25 let me know I am always looking for good places to get used parts


Dirt Maniac

Total posts: 194
posted November 15, 2004 10:53 AM  
Why wouldn't you buy it for $25. If you happened to wipe yours out in a heat race, it would pay for itself if it got to make 4- 5 laps in a feature on a night that you normally would have to load her up.


Back to the Archives