factory ’74-’85 472 / 500 / 425 / 368 with 2-groove crank pulley and 1 groove AC compressor pulley), and serpentine systems. Models with 3/4" ball/roller bearings offer five times the strength of standard bearings.High Volume Water Pump Late style, by FlowKoolerįits Cadillac 472, 500, 425, and 368 engines.įor use with front belt drive systems with 1 V-belt driving the Power Steering and AC compressor (i.e. Higher flow and pressure for better cooling Precision impeller installed to exacting tolerance. Precision ground fan hub for perfect pulley alignment.Įqual flow to left and right cylinder heads. Recommended for stock, OEM, or mild to moderate racing applications.Įxclusive Stewart 356-T6 heat treated aluminum castingĮxtra rigid cam stop with 3/8" adjustment screw (small block Chevrolet short castings)Įxtra material adjacent to block mounting bolts to allow drilling and taping of up to 1/2" NPT holes for installing external coolant lines to the center of the engine (small block and big block Chevrolet short castings) These pumps include several significant performance modifications, compared to Stage 1 pumps, for maximum performance. Stage 2 - These pumps from Stewart Components are assembled with exclusive Stewart Components 356-T6 heat-treated aluminum casting. ![]() Stewart Stage 2 Aluminum Water Pump - Chevrolet BB SKU: STE21204 ![]() Pretty much set on a high volume pump, just don't know which one.Ĭlick to expand.Sorry Stage 2 not stage 3 This is my understanding of trying to study what's available to study on it. And the say its best to use a Tstat in the 200 range. The boiling point is well above 300 without any pressure at all. So the heat induced expansion isn't as great as with water. Now this will be using the waterless coolant. The pressure in the radiator and hoses is from heat induced expansion of the coolant. I'm trying to see if I can increase the volume of flow thru the heads without increasing the speed. The bypass circuit thru the heads might flow quickly but it will also be restricted by the small head gasket holes. If the Tstat flow exceeds the pumps output then things go too fast, pressure drops and heating issues develop. If the pump flow exceeds the Tstat flow the pressure will be increased behind the tstat. Īs far as moving too fast thru the engine, the Tstat provides a restriction that will limit the amount of coolant flow thru the block. The pressure increase should stay between the block and the thermostat. ![]() This is going on a Chrysler hemi, 345 out to 421 cubic inches with a 671Ī very expensive radiator and waterless coolant. Why only a 1 year warranty on a 300.00 water pump ? Then there's hotheads ( im sure its repackaged )Īnd then the top of price range, and if you truly get what you pay for this should be the best. What's the big difference in weiand's "action plus" or their "team G" pump ?Īnyone ever deal with KMJ performance ? they have a 70.00 pump. I'm not afraid to spend some dough on this thing, but no sense in overpaying either. 70.00 to close to 350.00 for a Stewart stage 4. There's a bunch out there that claim to be High Volume and a huge range in price.
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