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Discussion Starter #1
I'm having some overheating issues & I'm considering a new aluminum radiator. I've narrowed it down to Champion & Entropy. I've researched both of them here and they seem to be quality units. Here are the advantages that I have noticed:
Champion:
Good unit at a good price (I'm looking at the 4-core).
Fits with no modification.
Will have to fabricate lower brackets to utilize stock shroud

Entropy:
Good unit at a slightly higher price (60-70 dollars)
Fits with no modification
I believe it comes with the tabs that allow me to use the stock shroud
Made in USA

I currently have my original Harrison 4-core. I had it gone through several years ago, but my car sat for quite a while before I installed the new motor. I flushed it out with a hose, but no way of knowing if it's partially plugged.
I also have a stock shroud & clutch fan with 7 blades. What do you guys think. I'm leaning towards Entropy, but have not made up my mind. Also since they are a Team Camaro Sponsor, do we get any kind of a discount?

thanks
 

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I used the Summit Direct Fit - it says it's made by Northern Radiator out of Minnesota, but it could very well be imported from China by Northern - dunno. but anyway, I wouldn't let the fan shroud mounting thing bother you - these should work. They utilize the lower mounting bolts on each side and work just fine. http://www.summitracing.com/parts/SUM-380660/
 

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Discussion Starter #5 (Edited)
Come on guys! You're supposed to make this easier for me, not harder.
So here is the recap:
Alumitech $495.00
Champion $279.00
Entropy $379.00
on both the Entropy & Champion filler necks are made from 6061 aluminum. Looks pretty heavy duty. could not tell on the Alumitech. Both the Alumitech & Entropy have the tabs that would allow me to use the stock shroud. I emailed Champion & they said I could fabricate brackets & attach to the bottom of the radiator.
 

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Just recieved my new Entrophy rad about a week ago, its for the ls3 conversion but from what I have seen so far is high quality on the welds, fit and finish.
 

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Discussion Starter #7
So Al how did the Summit radiator fit and work. Yammerhammer I also saw the brackets you mentioned & if I go the Champion route, I'll definitely get those. I'm wondering if the Champion 4 row vs. the Entropy 2 row provides more cooling or less?:confused:
 

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Had a champion three row on my BB, and AC, worked ok but
not good enough. I looked at entrophy, but bought a Griffin
2 row 1 1/2" tubes worked really great. I think you get better
airflow with a 2 row.
 

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The champion in the 71 started to seep at the header at the top, both right and left side after about a year and a half. Champion warrantied it, but blamed the engine for the problem.
My 408 ci small block with ac stays cool with my intrepid electric cooling fans during the heat of phoenix summers. BUT... I have temp problems when running the road course at firebird when it's warmer out. I can run for about 15 minutes and the temp gets to about 230. I have to pull into the pits.
When I do it again, I will buy a radiator with larger tubes, at least a 1" tube.
 

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I've had no problems with my Champion three row. Drove it thirty minutes to the dyno one day, hopped right on it, did five runs, and ECT reading from the intake stayed at 178 and mechanical probe in the head stayed at 195 (180 degree stat). When I ping the head with an infrared gun it reads closer to 180 when the gauge reads 195. I think the tip is sitting right against the chamber.

However, look at your tube area more than the row count. You need surface area. If they cram four rows into the space someone else gets two, chances are you have more surface area with the two row.
 

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I'm running the Alumitech - looks very close to a stock radiator and cools my 408 nicely. I would not hesitate to go this route again.
 

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Discussion Starter #13
I ordered the one from Entropy last night. Seems like the 2-row is the way to go. Plus I like that it's made in America. I appreciate all of the input. I'll let you know how everything turns out.
 

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Discussion Starter #14
All right I received my new radiator. It was packaged very well, no chance for damage. Interesting note, while waiting for the radiator I ordered a set of new mounting hardware. When it showed up I wanted to see how the rubber compression nuts worked. I discovered that one of my originals was still in the bottom hole after 40 something years! I had just used a bolt & nut in the hole above it. Here are a few pictures more to come....
 

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Discussion Starter #15
I really like the radiator it seems to be constructed very well. It did not come with any instructions at all. Not that you really need them to install the radiator, but it would have been nice for the brackets that the shroud attach to. On the passenger side the bracket did not quite extend far enough to reach the area of the shroud where it clips on. I cut a piece of metal I had in the shop & screwed it to the bracket & the ground down the points of the screws. after that everything went together nice. All of the holes were easy to match up since the radiator brackets had slotted holes. Only problem was I didn't tighten the top trans cooler line enough and I made a bit of a mess :eek: shiz happens! I took it for a test drive and my gauge did not get over the 1/2 way mark while cruising for about 20 minutes. But I continue to experience a big miss once the engine reaches operating temperature. It's a mystery to me. I'm going to try & figure out how to set the overall timing. Initial is at 8 degrees. But I think the Entropy radiator is a good product & a step in the right direction in solving my cars issues,
 

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