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Old 01-22-2008, 04:37 PM   #1 (permalink)
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Ecomodding Smaller Radiator of Choice?

Hey all,

My radiator in the UnNamed Wagon has a 'dribble' coming out of the side plastic seam. I am going to replace it with a smaller one.

Looking around, for a smaller radiator...I have come across a few options.
The radiators from the Metros and Civics are about the smallest stock radiators that I have found. The Hondas are much more reasonably priced (New Aftermarket).

My question is: Should I go with a 'thinner' radiator to save on weight (less capacity) or a thicker radiator to promote more/easier flow of the coolant.

Here are a few of the sizes that are available:
13-3/4 X 13-15/16 X 11/16
13-3/4 X 13-15/16 X 15/16
13 3/4 x 13 3/4 x 1
13 11/16 x 13 3/4 x 1 1/4
even a 2" racing one is available

My gut tells me to go with the thinnest, but would this cause the water pump to 'work harder' and take more hp from the engine?

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Old 01-22-2008, 04:39 PM   #2 (permalink)
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I'm not going to guess at the flow issues, but I will say that some older version of stick neon used a half radiator similar in size to the civic that can be picked up on ebay pretty cheaply.
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Old 01-22-2008, 04:53 PM   #3 (permalink)
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I'm going to say go with the cheaper of the thicker ones. You'll have slightly more cooling capacity, and since your going with a smaller radiator that won't be a bad thing. I don't think 1 lb of aluminum is going to matter much. Also, I'd try to get one with plastic end tanks for weight, not an all aluminum design. Below is a comparison of a two stock Tercel radiators. From back to front: 93 manual, 88 automatic, 1990s civic radiator. I did a weight comparison between the three and the savings from the largest to the Civic radiator was only like 4 lbs with water in it.

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