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Author Topic:   fans
Dirt Roller

Total posts: 18
posted August 02, 2005 11:27 AM  
What kind of fans are y'all using?
I used to run a stock 4 blade steel fan and switched to a plastic fan and I think I'm going back to the stock one...
A friend of mine recommended one out of an old Dodge truck.

I've got a shroud and a griffin 19x31" aluminum rad and a flowkooler water pump and a homemade front air dam, but I was still starting to get hot after 25 laps. (it was sloppy wet with big chunks of dirt on the nose...)

We run 200 Lap Enduros so I need to keep the Camaro cool for a long time. I'll trade HP for airflow.
(ok, at least until something else fails - the transmission let go on lap 25, but my 307 seems to be doing ok... and I'm not done yet, a friend of mine has a spare tranny.)

Dirt Maniac

Total posts: 107
posted August 02, 2005 01:24 PM  
I use a 4 blade off of an old Dodge w/slant 6. This thing has a good pitch to it and it moves a ton of air

Dirt Maniac

Total posts: 127
posted August 02, 2005 05:46 PM  
I use a 18" 5 blade nylon flex fan for me turning 5800 it works fine but if ya want my 2 cents its more of how well your fan shroud fits the fan you are using

racing is way too cool gave up golf for it

sc1 racing
Dirt Freak

Total posts: 419
posted August 02, 2005 09:07 PM  
my 15 in aluminum 6 blade fan pulls more air than the 17 in 4 blade anyday..why do people think the 4 blade pulls more?

Dirt Full Roller

Total posts: 70
posted August 03, 2005 07:48 AM  
I agree with sc1!

Dirt Forum Racer

Total posts: 88
posted August 03, 2005 08:45 AM has a 15" 6 blade fan that pulls more air than any other fan I have seen. Part #910-1575-15 $22.95

Drive every lap like it's the last one of the race

Dirt Roller

Total posts: 18
posted August 03, 2005 11:08 AM  
thanks guys.
I'm going to measure my shroud and get the biggest nastiest fan to fit. We're also allowed to run the stock heater so I may look into mounting a heater core.

(I need more cooling and the car is already overweight so what's another 10 pounds...)

Think anyone would complain if my heater core is actually a radiator with an electric fan?

sc1 racing
Dirt Freak

Total posts: 419
posted August 03, 2005 01:39 PM  
you dont need the biggest fan. get one that is smaller than center of radiator so the shroad will work good and be easier to rad is 31x19 and im sticking with the 15 in fan. pulls more air than it needs to cool, and only gets up to 180-200..

Dirt Freak

Total posts: 255
posted August 03, 2005 01:55 PM  
Bigger fan ='s more drag and horsepower loss.

Smallest fan you can use to cool it proper, with a good shroud.

And if your overweight, don't give up extra horsepower too.

Dirt Forum Champ
Total posts: 5390
posted August 03, 2005 07:06 PM  
I already have a shroud. I'm going to measure the opening and get one that'll fit in there nice and tight. (headed to the junkyard this weekend.)

It's a lower priority than replacing the busted transmission (that's tomorrow's project.)

Dirt Full Roller

Total posts: 50
posted August 09, 2005 09:02 PM  
You could look at an old ford pickup fan they are really stiff and fit the smaller al. radiators really nice with a tight radiator and the fan in and out the car would run 190 on a 100 degree day. Reach it at about lap 15 and hold all the way through lap 25. Run the speedway one to works the same for me the ford one was cheeper just pulled it out of a junk pickup i had laying around and hogged the holes to line up with the chevy water pump. Just read your rules some rules say you can't cross brands this would get you DQ'd for a stupid reason.

Dirt Full Roller

Total posts: 28
posted August 10, 2005 08:05 PM  
I run a stock five blade clutch fan stock fan shroud for early 80s v8 G-BODY and a 3 core copper rad it dont see 200 degrees. If the timing and fuel mixtures are correct it doesnt take much to keep them cool. Also I had to leave the car outside this winter so I 50/50 antifreeze and water,and thats still in there to im doing everything wrong on my cooling system and the car stays cool under pressure.

Dirt Full Roller

Total posts: 55
posted August 16, 2005 08:18 AM  
Trying something different. Had a dual electric fan setup laying around from a Nissan Maxima. Got to looking and it fits my radiator perfect. Hooked it up and seems to work great as far as idling in the garage. Anyone eles running electric fans?

Dirt Forum Champ
Total posts: 569
posted August 17, 2005 07:18 AM  
If you want to know about electric fans, do a search in the street stock area. You will find more posts than you will know what to do with.

Electric fans can work, but they take a lot of thought. Mounting them to the radiator is just the begining.

Dirt Roller

Total posts: 24
posted August 22, 2005 10:06 PM  
I ran a 307 also and i could not get it to cool down either. I tried everything. The one thing that worked great and never over heated again was the 3-core radiator out of my dad's race car a '79 cadillac

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