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Author Topic:   Front Pulleys Am I ???
Wheels47
Dirt Maniac

Total posts: 127
posted March 06, 2002 10:23 PM
Hey guys I finally remembered to measure the front pulleys-- Here's what we have --are we ok here to keep the engine cooler or should we go smaller or larger.. running a ford winsor engine --The pulleys are balancer= 5 3/4 inch and water pump 7 inch-- with a 16 in 6 blade steel fan.. Am I ok here --having a cooling problem and just trying to find out if this combo works ok--also running gas.. your input welcome.. wheels

bizkit
Dirt Full Roller

Total posts: 66
posted March 07, 2002 06:48 AM
4 BLADE STEEL FAN, WILL COOL YOU A HOLE BUNCH BETTER.

AFTER TRYING SEVERAL DIFFERENT OPTIONS I FINALLY GAVE INTO WHAT EVERYBODY AT THE TRACK WAS TELLING ME. I CAHNGED MINE AND RAN 20 DEGREES COOLER (220 TO 200) SINCE THEN I HAVE MASSAGED MY COOLING SYSTEM AND I KNOW RUN 180 TO 200 DEGREES WITH A ALUM. 18 DEGREE ENGINE IN A LATEMODEL AND I DO NOT HAVE THE FRON OPENED UP.

P.S. I THREW THE 6 BLADE FAN AWAY SO I WOULDN'T SELL IT TO ANYONE AND THEY HAVE THIS PROBLEM.

KELLY HANVEY WWW.DIRT-RACERS.COM/HANVEY.HTM

Wheels47
Dirt Maniac

Total posts: 127
posted March 07, 2002 07:34 PM
Thx much bizkit-- might have to try this but are our pullys matched ok also or should we be smaller or larger??
anyone else out there have any input??

thx in advance
wheels

Wheels47
Dirt Maniac

Total posts: 127
posted March 16, 2002 11:53 PM
Anyone else got any help here. We need to get down about another 20 to 25 degrees to be safe.. We are amking a few other changes but still wondering if we are running the best size pullys for most cooling..

Is the 4 blade fan a good idea???

thx in advance--Wheels

millerlt3
Dirt Forum Racer

Total posts: 96
posted March 17, 2002 06:34 PM
The pulley sizes sound correct, putting a larger pulley on the water pump reduces the volume it pumps. But there are other variables to having a good cooling system. 1st do you have a good four core aluminum radiator, 2nd to have the proper size restricter or thermostat, 3rd to have a good fan and yes the 4 blade steel fan is a good one. 4th is to have a good shroud. 5th make sure you have a good radiator cap I run a 21-25 lb. cap. Last is to make sure all the air that is possible is flowing through the radiator and not around or over it. hope this helps.

Wheels47
Dirt Maniac

Total posts: 127
posted March 18, 2002 06:15 PM
millerlt3--looks like we must be ok in all these areas except fan blade... we have a new griffen radiator on it installed in sept last year have tried every size restrictor plus a thermometer with inners stripped out.. have installed a new radiator shroud and a new water pump and running a 22 lb cap.. our fan blade is 6 blade so I think we will try the four a soon as possible..

are you guys running a pressurized radiator with the expansion jug?? Is this helpful??We have tried both ways and still running around 260 degrees.

thx for your input---Wheels

Pickel
Dirt Forum Champ
Total posts: 564
posted March 18, 2002 08:36 PM UIN: 25419780
Something else you may want to try is a cooler plug. I was running a constant 220 and a friend of mine told me to go to a cooler plug and I am down to 190...200 on a hot night. Just my two cents.

merlinmech
Dirt Full Roller

Total posts: 51
posted March 19, 2002 12:27 PM
you said you installed a new radiator. was it coolong before that? you can get a bad radiator. might check that. also try larger jets in the carb. just remember to keep your hat on so you don't pull all your hair out. good luck.

Scoot
Dirt Freak

Total posts: 330
posted March 19, 2002 07:19 PM
I don't use a restrictor, and I use an expansion tank(old antifreeze jug). I also have a griffin radiator using a 6 blade steel fan with the 30% reduction pulleys. I ran March 7-10 at Flippin and never got over 170 even in the 30 lap feature. Try it without the restrictor and with the fan about half inside the shroud. They say water is better by itself. Just my 2 cents hope it helps. Check out www.stewartcomponents.com they have some great tech articles.

------------------
Scoot
Smith Racing Team
870-365-5989

millerlt3
Dirt Forum Racer

Total posts: 96
posted March 19, 2002 08:07 PM
Hey Wheels47, 1 more thing you might want to check, and that is to verify that the gauge is good and reading the correct tempature, maybe just put a new one in just for piece of mind. And what Scoot says is also correct, that water is better because all that antifreeze does is of course not freeze but in our case all the antifreeze is good for is controling the boiling point. I run 1/3 of a gallon of antifreeze and the rest is water.

driver27
Dirt Full Roller

Total posts: 69
posted March 20, 2002 09:22 AM
One more thing to check is that the belts are not slipping on the pulleys. On the matched pulley sets you get from speedway and other, they have no adjustment for belt tension. Once the belts stretch a little, the pullys will spin inside the belt, especially at rpm and its a very hard thing to find. You may be amazed what new belts will do. With engine not running. grab the fan and see if you can spin it without the motor turning over, if you can, I think youve found your problem. Easy enough to check anyways.

Van

Wheels47
Dirt Maniac

Total posts: 127
posted March 22, 2002 11:12 PM
Hey guys thx for the info--Yes we were getting hot before the new radiator and still getting hot.. I think we may finally get on the track this weekend to try it. We also have a feeling that we're running lean from fuel shortage so we're looking at that area also..We have the belt pretty tight but will also check this out.. We've run about every size of jet that you can buy and this doesn't seem to change anything - 78 through 90 and couldn't see a difference. The guage could be off some but this baby is extemley hot when he pulls in. May just try a new guage and sender just to make sure thiugh.. Thx agian and any other suggestions out there we will check out.. I'll print this off before we go this weekend to take for reference also.. Thanks Wheels

KWTracer
Dirt Freak

Total posts: 233
posted March 23, 2002 08:04 AM
You mentioned that you think you may be suffering from a fuel shortage.. When you changed the jets, what did the plugs look like? If the plugs look really lean no matter which jets your using, and you think you may be getting because a lack of fuel, you might want to look for vacume leaks as well. Just a thought.

Wheels47
Dirt Maniac

Total posts: 127
posted March 23, 2002 09:16 AM
KW thx bud I think we are headed for the track today for practice and this is one of the first test we are gonna do--spark plugs that is. thx much..

34Racing
Dirt Forum Racer

Total posts: 97
posted March 23, 2002 07:10 PM
Hey 47,
Some guys around here put about 2 cap fulls of downy fabric softener in their radiators.I have never tried this and only heard about it this week. Another thing I heard this week was that if you use a aluminum radiator and then empty all the fluid out and store it in a cool place without ceiling the radiator up it will start to corrode on the inside and will not cool anymore no matter how much water you flow through it. Something to think about!

Wheels47
Dirt Maniac

Total posts: 127
posted March 24, 2002 08:29 AM
Thx 34racing we kept antifreeze in it for the winter but the radiator was new last year and we still got hot.

Dirt-Tracker
Dirt Full Roller

Total posts: 60
posted March 24, 2002 01:18 PM
Hey Wheels47-
I think that the radiator is only a 2 core....I noticed someone above said to try a 4 core!! Hmmm

Robcat
Dirt Roller

Total posts: 22
posted March 25, 2002 06:20 PM
Just a thought! Have you checked the timing? Have you checked the timing light & or marks on the dampner? If it gets hot fast we have found problems there. Just an idea.

Good Luck!

Wheels47
Dirt Maniac

Total posts: 127
posted March 28, 2002 10:27 PM
Robcat--- we will check these marks out--- if it's getting hot because of timing would you say we are advanced to much or not enough---which will run hotter higher or lower advance...

Dirt-tracker I think the belt loose maybe be another area-- If you remember we can turn the fan but I think the crank was turning with it also so we need to double check that .. just a thought..

Keep um coming guys we are making notes and gonna be checking ever one of these till we find out why it's getting so hot..

BTW--we were rained out sunday and didn't get to practice--

fast19
Dirt Full Roller

Total posts: 26
posted April 04, 2002 02:02 PM
I run 430 inch SBC iron motor, iron heads. Ran hot until I changed to a Stewart water pump at crankshaft speed (1:1 pulleys stock size) This is per Stewart web site recomendations. If you run alky or aluminum motors you can get by with less. I almost went nuts before finding this easy combo.
SEE YA and good luck!

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