elecrtic water pump question

when running an electric waterpump in a street car should you run a restrictor, thermostat or nothing at all? Trying to get temps down while driving in town on a big block chev. Have Huge rad with 2500 cfm fans, no problems at hwy speeds but horrible in town

cooter wrote:when running an electric waterpump in a street car should you run a restrictor, thermostat or nothing at all? Trying to get temps down while driving in town on a big block chev. Have Huge rad with 2500 cfm fans, no problems at hwy speeds but horrible in town

What name brand are the fans?... pushing or pulling? ...are you running and water wetter in it? ...what temps is it running in the city? hwy? ...what is your timing currently set at?...what is your current motor?

You mention your 2500 cfm fans, so I'm going to assume they have some kind of plastic shroud. However, if you don't have a shroud of some type, it's the most important thing you can do. The fact that it cools off at highway speeds, indicates that it is some kind of ductwork/airflow problem between the fans and radiator.

Hope this helps,
Charlie

chevy os the problem he made me do it

I agree air flow problem yes a termastat will help cool it down in town by holding thr water in the rad longer to cool it down more than it running straight tro

The 2 fans are pullers with a shroud, the pump is a CSR, the timing is set at 34 total. Hwy temp is 160. In town the temp slowly climbs to 210 and then it climbs fast. Its a 555 big chevy in a 68 camaro, not a chevy but it sure is fun to drive

cooter wrote:The 2 fans are pullers with a shroud, the pump is a CSR, the timing is set at 34 total. Hwy temp is 160. In town the temp slowly climbs to 210 and then it climbs fast. Its a 555 big chevy in a 68 camaro, not a chevy but it sure is fun to drive

I'm assuming your running it wide open....most street guys are running a thermostat with some 1/8" holes drilled on the outer edge for bypass. There is always an option of trying a restrictor first to see if that slows down the water enough. If your not already running some water wetter in it I would start there.

it is wide open despite my opinion to the customer, will try a drilled t stat and water wetter. thanx for all the help.

hi cooter, usually highway overheating is water restriction and town overheating is air restriction, this is NOT always usual , with a electric pump use a restrictor [thermostat with centre removed] this helps keep water flow low enough for efficient heat transfer

installed restrictor and temps in town dropped considerably. Not sure what will happen on a hot summers day in traffic but for now we are up and bag driving Thanx for the help everyone.