which radiator for sb ac auto car - Team Camaro Tech
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post #1 of 8 (permalink) Old Jun 3rd, 10, 06:35 PM Thread Starter
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which radiator for sb ac auto car

I have a 350 with vintage air and auto trans. My engine is plane jane with a cam and headers. I now have a 21" 3 row radiator that seems to be running 200-210 riding 55 with the heat on after flushing it a few times. I see confusing information I'm not sure if I should buy a 21" radiator or 23" radiator. thanks angie
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post #2 of 8 (permalink) Old Jun 3rd, 10, 07:26 PM
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Re: which radiator for sb ac auto car

Do you want a mechanical fan set up or an electrical fan set up? Are you on a budget? What is the most you want to spend? Alot of different options. I have similar to you set up wise. I am using the Entropy BB radiator and dual fan set up. Roughly $725 for radiator and wiring harness. You would have to get a 68 SB with a/c upper radiator hose. You didn't say what yr. car you have. I am giving info for a 69. That is what I have. My temps run about 185*.
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post #3 of 8 (permalink) Old Jun 4th, 10, 02:48 AM
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Re: which radiator for sb ac auto car

Was this an issue before flushing ?

You may have loosened up some trash thats plugging the tubes or may even need a shop to dip it ?

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post #4 of 8 (permalink) Old Jun 4th, 10, 03:54 AM
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Re: which radiator for sb ac auto car

Twenty-three inch radiator is for A/C equipped cars. As said, several flushings may have loosen trash/sediment and plugged the core.

Original equipped AC cars usually have a larger crankshaft pulley to overdrive the water pump. Since you have Vintage, aftermarket AC, not a problem, and a Plain Jane, the pulleys may be of the same diameter and w/pump turning at the same speed. You can get a larger c/shaft pulley from one of the vendors here. You also might look into getting either a clutch fan set-up, again original AC option included in the AC option, or a flex fan as the mechanical four-blade fan may be hindering air flow through the radiator at highway speeds.

Installing a high flow thermostat may help also.
a strip of foam across the top of the radiator support to seal the hood from the front of the radiator would help, prevents recycling of hot air through the radiator.
Ensure rad cap is good, 210F is not bad, as long as it doesn't boilover.

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post #5 of 8 (permalink) Old Jun 4th, 10, 06:17 AM
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Re: which radiator for sb ac auto car

If it's an old radiator flushing it is like trying to buff out a dent in your hood. you need to have it rodded out there isn't any other fix.
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post #6 of 8 (permalink) Old Jun 5th, 10, 08:49 AM Thread Starter
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Re: which radiator for sb ac auto car

I have a 69 camaro. The radiator seems to have this rust mud like stuff in it. after flushing it runs cooler but not great. It still has some stuff in it. I guess I would like to keep the stock clutch style fan. I was wondering if I would need the strait neck or curved neck radiator? my a/c is on the driver side of the engine.
Thanks
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post #7 of 8 (permalink) Old Jun 5th, 10, 12:04 PM
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Re: which radiator for sb ac auto car

The straight neck works on the small block , the curved neck is needed on the big block .
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post #8 of 8 (permalink) Old Jun 5th, 10, 01:10 PM Thread Starter
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Re: which radiator for sb ac auto car

Okay thanks alot guys
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