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Author Topic:   cooling motor ?
stic8
Dirt Full Roller

Total posts: 69
posted July 30, 2004 07:04 PM  
what is your opinion about spraying water through radiator to help cool engine ? at certain times only running 260 comin in , driver freaks we spray end of story

iowatoolman
Dirt Freak

Total posts: 369
posted July 30, 2004 09:18 PM  
i see it done all the time, i have done to my car but if you read the article in this months circle track mag it says not to do it because it can bend the fins in the rad and cause an overheating problem

stic8
Dirt Full Roller

Total posts: 69
posted July 30, 2004 09:28 PM  
iowa how do they say to cool it properly without damage in my opinion 260 isnt that bad let it cool naturaly should be ok dont you think

waltonjr1
Dirt Forum Champ
Total posts: 516
posted July 30, 2004 09:59 PM  
I dont like to see anything over 220, 260 can cause some real problems in my opinion.


iowatoolman
Dirt Freak

Total posts: 369
posted July 31, 2004 12:19 AM  
the best way i have found (check with your rules) mount a garden sprayer in the cockpit with you and run the hose up in front of the rad using 1/4 inch fuel line hose with slits cut in it about every 3 to 5 inches plug the very end pump it up before racing and when it gets hot squeeze the trigger to let some water out make sure the water is spraying down and not into the rad. because if it is spraying into the rad it only cools just that part not all of it
it works great on those long restarts when you have been racing and engine is hot and no airflow thru the rad. this works awesome if you have any questions PM me and i can send pictures of the bracket i made to hold the bottle. i have had no problems with tech and it also works to add weight to the pass side to offset the driver (for figure 8 since we have to turn both directions)

iowatoolman
Dirt Freak

Total posts: 369
posted July 31, 2004 12:22 AM  
yea by the way anything over 240 to 250 can cause problems in your motor scored pistons broke rings blown head gaskets lots of stuff so don't let your motor get to 260!!!!!!
drive hard or drive home

akadirtracer7
Dirt Freak

Total posts: 217
posted July 31, 2004 06:26 AM  
seems like if your in the begining of the race and you have to spray, you might end up with a radiator full of mud before your done.We usally run on a dry slick dusty track.Seems like the dust and water might plug the rad up itself.

shifty8
Dirt Maniac

Total posts: 123
posted July 31, 2004 06:57 AM  
i have alwaysjust put water on the side tank where the upper rad hose comes in to the rad and it works great it keeps the water off the fins and out of the fan so u dont get wet doing it. i have a hole cut in the top of the shroud so i can do this. i have seen guys put water on the front of the rad and all across the top and all u can see is a cloud of water going every where i run hot some nights like 240 and 2 pails of water bring it right back down to 200. just how i do it if it works for u than i did my deed for the day...lol happy racing

akadirtracer7
Dirt Freak

Total posts: 217
posted July 31, 2004 07:10 AM  
My problem is in the other direction getting temp up.shroud on the back no holes in the nose and only gets to 190 by the end of a 20 lapper.

iowatoolman
Dirt Freak

Total posts: 369
posted July 31, 2004 08:56 AM  
that could be that you need a water restrictor or check your timing

but remember that most small blocks make the most power around 180 so if you are only getting to 190 than you should be making more power in theory

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 31, 2004 12:18 PM  
I have a 5 gallon bucket mounted behind my seat with a boat bilge bump in it, rubber house running to a piece copper tube with holes in it. here in NM where it's really hot most of the race season almost everyone has a spray down bar and all the local track say right in the rules spray bars OK. when your using it hardly any water reaches the track wetting the track has never been an issue. I try not to use it in the heat if at all possible and only in the main when there's multible extended caution, I don't like using it in the heat or during the main as stated before it collects all the dust and cloggs the radiator. i usually only use it as i exit the track or sitting in tech car usually runs between 210 and 220 but will start to rise as i come off if i don't spray it down. I've also seen RV water pumps used.

stormy
Dirt Full Roller

Total posts: 49
posted July 31, 2004 05:01 PM  
a windshield washer pump works good too

iowatoolman
Dirt Freak

Total posts: 369
posted August 01, 2004 12:35 AM  
i seen a guy that had a 30 gallon chem sprayer in the trunk and had an electric pump set on a rocker switch i wouldn'r go that extreme but 2 gallons of water isn't going to make that big of difference and i don't think of it as a bandaid i only use it in extreme cases when coming off the track after the main when my water guy isn't paying attention or when like a car flips and it takes several minutes to get it cleaned up after racing hard and the motor needs to cool off just a bit because of the sudden stop of air flow from stopping.
if you are using it because your motor ALWAYS RUNS HOT than yea you need to fix the problem not "bandaid the mess"

77k
Dirt Maniac

Total posts: 174
posted August 01, 2004 02:30 AM  
We all use old water filled fire extinishers to spray down the down the front of our radiators and never had trouble. I don't like shutting mine off if it is over 230. It can heat up more and blow rads or hoses.

    

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