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1997 GMC K3500 dually 4L80 4x4
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Here's a picture of the original water pump and the balanced flow water pump. Looks like the impeller is a little closer fitting, and the passages are a bit smaller in volume. I'm also installing the fan, clutch and bypass reducer fitting. I was curious of the differences on the inside. I'll report my new temps after I get some trips on her.
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Interesting. For some reason I never thought about laying them down next to each other... Thanks. If I remember by tomorrow, I will still do so.
 

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1995 Chevrolet Silverado Z71 6.5 TD
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643 Posts
Here's a picture of the original water pump and the balanced flow water pump. Looks like the impeller is a little closer fitting, and the passages are a bit smaller in volume. I'm also installing the fan, clutch and bypass reducer fitting. I was curious of the differences on the inside. I'll report my new temps after I get some trips on her. View attachment 651811
Exactly the balanced flow impeller is closer to the case than the standard water pump and I believe it is made from Billet. It is made that way to push more water. With the BFR if you have a dual stat crossover the water is balanced to the radiator and to the heads. FlowKooler Water Pumps. Check them out.
 
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