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DodgeViper · 05-31-2002, 10:09 AM

Through my experience in my setup, Eheim 1250, Gemini High Volume W/B, Chevy Chevette heater core, and 1/2” silicon tubing. The Eheim pump delivered 190 GPH at a 12” rise. Once the block was placed inline the GPH dropped to 64 gallons per hour at 12” rise. Next was to place the heater core inline. Now the GPH has dropped to 60 gallons per hour.

The inlet side of the pump I placed a 90 degree barb. This has caused a restriction to the flow, but the biggest restriction lies in the water block. With only 60 gallons per hour of water moving through the system I would have to agree that bigger is not better. Heat is being added using a bigger pump. I wish I had a Ehiem 1048 that consumes 10 watts to test against the 28 watts that the 1250 puts out. I have found that leaving the pump run 24/7 without any fans cooling the heater core and the computer turned off, the water temp will climb to over 140F degrees after about 7 hours. This causes stress on the CPU as it will take 4-5 minutes for the CPU temps to stabilize to the normal operating temps. If your overclocking you may encounter that your computer may not even post because of the higher CPU temps at start up. This is the reason I use a relay to turn the pump on and off. It has been said turning the pump on and off damages the pump. This is B/S. A magnetic drive pump has one moving part.

Currently my system is totally enclosed and my delta temps are 8c. I am using a push/pull rad/fan setup with the fans blowing onto the pump. Just behind the pump I have 2-80mm fans pulling the air from the case.

05-31-2002, 10:09 AM	#20
DodgeViper Registered User Join Date: Feb 2002 Location: Tucson, Arizona Posts: 204	Through my experience in my setup, Eheim 1250, Gemini High Volume W/B, Chevy Chevette heater core, and 1/2” silicon tubing. The Eheim pump delivered 190 GPH at a 12” rise. Once the block was placed inline the GPH dropped to 64 gallons per hour at 12” rise. Next was to place the heater core inline. Now the GPH has dropped to 60 gallons per hour. The inlet side of the pump I placed a 90 degree barb. This has caused a restriction to the flow, but the biggest restriction lies in the water block. With only 60 gallons per hour of water moving through the system I would have to agree that bigger is not better. Heat is being added using a bigger pump. I wish I had a Ehiem 1048 that consumes 10 watts to test against the 28 watts that the 1250 puts out. I have found that leaving the pump run 24/7 without any fans cooling the heater core and the computer turned off, the water temp will climb to over 140F degrees after about 7 hours. This causes stress on the CPU as it will take 4-5 minutes for the CPU temps to stabilize to the normal operating temps. If your overclocking you may encounter that your computer may not even post because of the higher CPU temps at start up. This is the reason I use a relay to turn the pump on and off. It has been said turning the pump on and off damages the pump. This is B/S. A magnetic drive pump has one moving part. Currently my system is totally enclosed and my delta temps are 8c. I am using a push/pull rad/fan setup with the fans blowing onto the pump. Just behind the pump I have 2-80mm fans pulling the air from the case. Last edited by DodgeViper; 05-31-2002 at 10:35 AM.