08-07-2003, 04:15 PM
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CC Member
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Join Date: Aug 2002
Location: SOUTH FLORIDA,
Posts: 135
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Not Ranked
THERE IS GENERALY NO NEED TO SPEED UP THE WATER FLOW TO THE RADIATOR. THE SAME BTU TRANSFER TAKES PLACE WITH COOLANT MOVING FAST OR SLOW.
HOWEVER, ENOUGH FLOW IS NEEDED TO PREVENT HOT SPOTS IN THE SYSTEM OR TO SPREAD THE HEAT AROUND.
I HAVE SEEN WATER PUMP RPM SPEEDS AS SLOW AS EQUAL WP PULLEY SIZE TO THE CRANK SHAFT. THIS WOULD BE THE LOWER EXTREME, LIGHT CAR, SHORT DURATION LOADS, MOST HP.
SMALLER WP PULLEY SAME CRANK PULLEY SPINS IT FASTER, USES HP TO DO THIS , OFTEN UNNECESSARILY IN A COBRA APPLICATION.
EG. YOU WILL OFTEN SEE TRUCKS WITH A WP PULLEY MUCH SMALLER THAN THE CRANK PULLEY TO SPIN IT FASTER FOR SUSTAINED LOAD CONDITIONS. SUBTRACTS HP BUT SPREADS THE HEAT AROUND.
IN NORMAL COBRA USE, NOT MUCH SUSTAINED LOAD, LESS FLOW, = HP GAIN.
I AGREE WITH SLOWING DOWN THE "STOCK" PUMP WITH PULLEY JUGGLING.
SAVE YOUR $ FOR MORE FUN STUFF AS HP GAINS ARE SMALL, WELL UNDER 10 RWHP AT HIGH RPM.
B. SMITH
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