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Author Topic:   overheating problems?
chevy_20
Dirt Maniac

Total posts: 109
posted May 15, 2005 07:26 PM  
I run a 360 sprint with a carburetor. I'm having problems with it overheating. I've tried everything, changed waterpump, radiator, lines, went up on jets, changed cam, even the gauge. Basically everything I can think of, but it still runs 240 in a 30 lap feature. What could be causing my problem? Thanks

rocket36
Dirt Freak

Total posts: 209
posted May 15, 2005 10:57 PM  
check your timing.
give each cylinder a leak down test.
check that you have adequate fuel pressure and supply.
check that your radiator has no damage (both internally and externally).

every carburated sprintcar engine that i have seen that is running one of those kse style crankshaft drive, timing cover mounted water pumps seem to run hot. if you have one, take it off and fit a standard mount, aluminium racing pump (edelbrock, stewart).

[This message has been edited by rocket36 (edited May 15, 2005).]

chevy_20
Dirt Maniac

Total posts: 109
posted May 16, 2005 12:55 AM  
I run a standard mount water pump. I've checked the timing, but the only thing I haven't tried is a leakdown test. I'll try that. Thanks

rocket36
Dirt Freak

Total posts: 209
posted May 16, 2005 02:27 AM  
a guy that i help out that runs a "limited sprintcar" (carby'd 360 engine) had a cooling problem early this season when we fitted him a new engine. turned out to be a damaged aluminium radiator caused by the previous engine failure. fitted a new radiator from pwr (paul weel radiators) and problem was solved.
apparently it is common for the "tubes" in the radiator to swell under the pressure of a blown head gasket.
just something worth checking.

goinrcn44h
Dirt Freak

Total posts: 205
posted May 16, 2005 12:52 PM  
also a blown head gasket or a seeping head gasket will push hot exhaust into the water causing a spike in temp. a leak down should show which and if that is the problem though.
Also, verify that the gauge is accurate, I have had a couple water temp gauges just flat be out of whack and read both hi and low. after 30 laps if you are on gas 240 is high but not devastating, same on methynol. but on methanol you just fatten it slightly. but it would be nice to be a shade less of course.
44H

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