Alfa Romeo Bulletin Board & Forums - View Single Post - running hot at stop lights and heavy traffic
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post #12 of (permalink) Old 07-20-2019, 09:13 PM
180OUT
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Join Date: Mar 2007
Location: San Antonio, Texas
Posts: 4,084
I have a built Alfa motor that's pretty close to what your are running. I had the same problem with a stock radiator. I cured the problem by have a good radiator shop re-core my stock radiator making a 3 core instead of a 2 core. I run two 8in pusher fans with a stock threaded thermostat. My hot-rod motor now stays cool even in 100 degree stop and go traffic.

Having your radiator re-cored dramatically increases it's cooling capacity. Since the shop simply modified my existing radiator, mounting it wasn't a problem. The extra thickness, however, made it hard to mount my preferred 10in pusher electric fan. Most radiator shops (if you can find an old-school traditional one) will do a re-core for less money than an aluminum race-radiator. The only drawback is that re-cored radiators lack the street-cred of aluminum radiators.

Before you start doing anything major, check your teps with your friend's external tester. When I did that I found that my temp gauge was reading high.

Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
'62, Lancia Flaminia Zagato3c, 2nd series
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