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Author Topic:   reduction
Whitelightning
Dirt Freak

Total posts: 429
posted March 23, 2005 10:58 AM  
ran 190 - 200 during race buut soon has you slow down or even let it idle prior to race it tries to run hot, aluminum radiator, 25 % reduction pulleys, I was thinking that since its fine when you run it that the reduction pulleys are my problem , what yall think

juni
Dirt Maniac

Total posts: 184
posted March 23, 2005 11:20 AM  
What size fan and do you have a good shroud ,how far is your fan into the shroud.

Whitelightning
Dirt Freak

Total posts: 429
posted March 23, 2005 11:44 AM  
its moving plenty of air, but i have the six blade race fan

BigDaddy59sRacing
Dirt Newbie

Total posts: 2
posted March 23, 2005 11:53 AM  
Do you have a thermostat or not? What for water pump do you run? Do you clean your radiator fins often? What do you consider "hot" while idling?

zeroracing
Dirt Forum Champ
Total posts: 1875
posted March 23, 2005 12:23 PM  
Your problem is in the pulleys. We ran a b mod, a 355 with a 2 barrel on it. the car would run fine under green then under caution it would overheat, or red flags were the worst. anyways we had 30% reduction pulleys on it.
We changed to 1:1 pulleys and fixed the problem instantly. that was the only thing that we changed.
get some 1:1 pulleys and sell off the 30% ones.

dirty58
Dirt Maniac

Total posts: 115
posted March 23, 2005 06:43 PM  
I do not think its your pulleys i run the same set up comming off the track about 215 ck fan shroud or restriction in radaitor also i run a 5/8 restrictor

racer17j
Dirt Forum Champ
Total posts: 5390
posted March 23, 2005 08:39 PM  
I agree with zerq. 1 to 1 is the way to go. It will fix the problem.

powerglides
Dirt Freak

Total posts: 374
posted March 24, 2005 04:47 AM  
Count me in the 1 to 1 club also. Also a good shroud and no restrictor (to start with). Go on stewart components website and read all the tech acticles they are real eye openers.

merlinmech2
Dirt Maniac

Total posts: 131
posted March 24, 2005 05:57 AM  
where can you get deep groove 1-1 pulleys?

Whitelightning
Dirt Freak

Total posts: 429
posted March 24, 2005 06:00 AM  
IT will be 200 racing in the feature, but soon as you slow up it will get 220 or so

Istock66
unregistered Total posts: 429
posted March 24, 2005 08:19 AM           send a private message to Whitelightning   Edit/Delete Message   Reply w/QuoteBBBBBB
1-1 pulleys, high flow stat, 4 blade steel fan very pitched (more than a Afco which didnt keep me cool)

I run 406s with a 350 carb and dont break 200 ever. And when I am under caution or slow down for a lap my temp cools quickly down to my stat.

Basically my stat warms my water up to its set temp before I race then after that its just open except on cautions.

I dont have any holes in my nose.

WesternAuto17
Dirt Forum Champ
Total posts: 569
posted March 24, 2005 01:08 PM  
Best thing I ever did to help my car stay cool was build a shroud or air box between the front of the radiator and the the nose. This way the air entering the grille has nowhere to go but thru the radiator.

This set up even works with electric fans turned off under green conditions.

220 isn't really hot as long as it stays at 220, there's 225 degree T-stats. Once you get over 220, your getting in trouble.

nailngoracing
Dirt Maniac

Total posts: 170
posted March 24, 2005 02:43 PM  
my s-10 pickup runs 250 on a regular basis!

my race car runs 220-240 during cautions and 180-200 during green.

racer17j
Dirt Forum Champ
Total posts: 5390
posted March 24, 2005 04:44 PM  
i've run 50% reduction pullies(3" crank, 6" waterpump) on a 550+ hp engine on gasoline without any problems. the car would get a little warm during cautions on hot summer nights but nothing crazy. i would come in around 200 and it would get to around 220-225 during cautions.

the key, like some others have mentioned, is a good stiff blade fan and shroud...

racer038
Dirt Maniac

Total posts: 111
posted March 25, 2005 05:52 AM  
Where do you 1-1 guys get your pulleys? Can you recommend a part #?

sixwillwin
Dirt Freak

Total posts: 493
posted March 25, 2005 06:14 AM  
Day motorsports, Speedway, Performance Bodies all have them in their catalogs

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The Joy of Six website

powerglides
Dirt Freak

Total posts: 374
posted March 25, 2005 07:49 AM  
Got mine off stock chevys you do not need deep groove pulleys. I run one belt from crank to water pump and one around crank water pump and ps pump. NEVER lost a belt but did my homework on pulley alignment.

AtomicPunk
Dirt Maniac

Total posts: 130
posted March 25, 2005 12:20 PM  
We have our radiator boxed in the front with two 4"x7" openings in the nose, no stat, fan shroud with a six blade steel fan 1/2 way in the shroud, 25% reduction (I think) pulley on the crank. On cool nights with no stat we have to block off the rad cuz it won't get over 170 at all.

BRIANSTINNY2
Dirt Roller

Total posts: 7
posted April 21, 2005 09:50 PM  
190 TOPS ALL THE TIME RACING,CAUTIONS PITTING AFTER RACE.CHECK YOUR TIMING THEN DITCH THE RADIATOR FOR A STOCK 4 CORE P/UP (1).SIZE? MEASURE YOUR RIDE &USE SHROUD.

shadowsarge
Dirt Full Roller

Total posts: 60
posted April 22, 2005 05:31 PM  
quote:
Originally posted by sixwillwin:
Day motorsports, Speedway, Performance Bodies all have them in their catalogs


Got mine from Day Motorsports.Part # PK-0002L for long water pump.
Perf. Bodies # 15420

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No Guts - No Glory, STAND ON IT !!

shadowsarge
Dirt Full Roller

Total posts: 60
posted April 22, 2005 05:35 PM  
By the way, anybody else have a b***h of a time getting the belts on the deep groove pulleys?

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No Guts - No Glory, STAND ON IT !!

ryan
Dirt Forum Champ
Total posts: 776
posted April 23, 2005 12:11 AM  
1 to 1 deep groove alum. you won't regret it.
Shadow, I used to have a **** of a time getting the one that goes from crank to wp, but all I do is use a plastic stick thats about 1/4 inch thick and 6" long 1" wide(Dad said it was originally from putting in some windshield) You take that stick and put it one the left side of the pulley and pry towards the motor and have somebody bump the starter(make sure the hot wire is off the dist.) and it will work right in. Sometimes it will twist and you can use a pair of pliers and put a twist in the belt on the right side and it will work its way back. Works for me anyways.
p.s. keep your hands clear and have somebody with a gentle touch to run the starter button

[This message has been edited by ryan (edited April 23, 2005).]

racer038
Dirt Maniac

Total posts: 111
posted April 23, 2005 06:34 AM  
Please bring me back to reality. 1:1 pulleys would have the same diameter for the crank and waterpump? If the WP pulley was 20% longer in Circumference than the Crank pulley, would that give us a 20% reduction?
I've got two sets of everything and have them all mixed up. Crank bolts, pulley bolts, fan spacer bolts in combination with a pulley blah, blah, blah. I'd like to run the 1:1 pulleys, if I've got them, but I've bought and accumulated so much junk over the years, it's a mess. Any comments are appreciated. (other than about my lack of organization!!!!)

BCracing
Dirt Full Roller

Total posts: 32
posted April 23, 2005 08:11 AM  
yes if your waterpump pulley is bigger then your crank pulley that is a reducted set--if its 20% reducted your crank will have to rotate 432 deg. before your waterpump rotates 360 deg

    

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