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Author Topic:   overheating
ds_slideways
Member
posted July 30, 2002 07:56 PM
i have an over heating problem i've tried every trick in the book.We are out of ideas need some help.


28
Member
posted July 30, 2002 11:42 PM
i'm running a 383 on gas. i have a shroud on and the fan is about 1 1/2 inches from the radaitor.I have a new radiator with holes in the nose piece.We set are timing at 34 to free up the engine{something else we tried this week}.stock water pump but its new and it has good flow.no springs in the hoses.and we have a 5/8 restricter in the bottom hose.my car will be at 250 by lap 13 or so,sooner if we have a yellow.we even went as far as putting an electric fan on the out side of the radiator to pull air threw it.didn't help at all.we have are cam 4 degrees advanced could that be part of it?i'm running a 750 holley with 75 jets.it's getting plenty of fuel i think. when i load it and from the shop to the trailer its at 140.


tilley88
Member
posted July 31, 2002 10:32 PM
Why would you take the springs outta the hoses? Would'nt that cause them to collapse? Maybe I'm missing something here.


28
Member
posted August 01, 2002 01:20 AM
You need a spring in the bottom hose! that is what keeps it from getting sucked shut. The 5/8" restrictor goes in the top hose. tis slows the water speed down.


28
Member
posted August 01, 2002 02:08 PM
i have the fan half out of the shroud.As far as restricters go i have tried it both ways,no restcticter restricter in the top hose,resricter in the bottom hose and one in both.after i come in and get it cooled down we take the cap of and i have to ad water to.my radiator is bran new and i know it don't leak.


fast19
Member
posted August 01, 2002 03:50 PM
Sounds to me that you hit the nail on the head. I think cavitation is the problem. Stock pumps have a stamped impeller that was not designed for 6500 rpm. 150 bucks for a good water pump should help a ton. Good call 19


2FAST4U
Member
posted August 02, 2002 02:32 AM
what kinda of water pump do u have?
i have heard thier is a certain kinda that flow backwords and thats not good...
try alky...that helps like no other
it will do your trick.


fast19
Member
posted August 02, 2002 03:45 PM
DS, I also run gas. I have ran a 383, 406, and 358 now. I have never had a hot motor. No fan shroud, no holes in the nose. I use a Stewart water pump, about 6 years old with no trouble, 3/4" restricter in thermo housing, the good green stripe hoses with internal springs. I think one of the most important things is the fan. I only use the old 4 blade Ford type fan about 1" to 1 1/2" from the rad. I also always run 2 bottles of Red Line water wetter. This combo has never ran over 200 deg in summer on gas.