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Author Topic:   Radiators
marty
Dirt Maniac

Total posts: 111
posted February 15, 2002 05:05 PM
Hi,
I was just wondering what any of you guys thoughts were on the best radiator (cooling & strength). Would it be better to go with say a copper/brass rad with 5 rows & 1/2 inch tubes or aluminium with 2 rows & 1 inch tubes? Any thoughts would be real welcome as i'm thinking of changing mine soon.

sdhnc29
Dirt Freak

Total posts: 467
posted February 15, 2002 11:42 PM
We use an AFCO aluminum radiator in our late model . It also has a built in heat exchanger , which I'd recommend using . My SB2.2 engine run's 180-190 degree's in the middle of the summer , and we always have to block part of the radiator during the spring and fall . This is using race gas , and the big 19" GM 4 blade fan .

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780

YAZ
Dirt Forum Racer

Total posts: 77
posted February 17, 2002 08:38 AM
aluminum is far better. I wish
my class would alow us to run
them. plus there lighter.

jammin
Dirt Administrator

Total posts: 5556
posted February 17, 2002 10:15 AM UIN: 16262997
Howe Racing Radiators has a 1 row unit that is supposed to be great for methanol motors. I have not run it yet, but I have been told that on a two row alumimun radiator that the second row doesnt do very well in the heat exchange for the simple reason the air is already warm after the air passes by the first row. Which makes the efficiency of the second row very low. I am also looking at the weight factor in that if you have to put an extra gallon of water in the radiator for the second row, your talking about 7 lbs of water, plus the difference in the size of the radiator. I havent weighed it, but there is about 8-10 lbs in the front of the car to be had in weight. On a 2000 lb car, 10lbs is 1/2 a percent to the rear guys. It would make a difference. I didnt realize what a real quality radiator was until i got these here from http://www.alumrad.com . I looked at a new griffin that I have, and really, there is no comparison. The fins are welded on the howe....epoxied on the griffin. The actual radiator core is made where air can pass thru easier in a larger quantity also to make it easier to cool. I just wanted to let you guys know this because there is definitely a huge performance advantage to be gained from them if your running methanol. They do have 2 rows also for running gas that are as high of quality as the 1 rows that are also welded.

My 2 cents.

jammin

marty
Dirt Maniac

Total posts: 111
posted February 17, 2002 04:24 PM
Thanks for the tips guys (keep them coming). I will check out the site you mentioned jammin but if it doesn't say what diameter tubes they use could you let me know please? Thanks again,
Marty.

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