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Author Topic:   Fan Shroud
Dirt Forum Racer

Total posts: 97
posted June 28, 2002 07:18 PM
Just going to put our new radiator in, and was wondering if we should use the old piece'o'junk shroud we've been using, make a new one, or just plain forget it. I never have run over 200 degrees. I was thinking it would probably heat up more when they have us stopped for lineup or caution laps if we didn't have a shroud, but would it be better while running full speed because the air has a strait path through all of the fins. How many degrees difference would it be between shroud and no shroud? I'll just wait and see what you people think. Also what are some creative ways you have made shrouds that look halfway decent?

Dirt Freak

Total posts: 333
posted June 29, 2002 01:07 PM UIN: 23443678
I was going to put a shroud on this year but after talking to some people i changed my fan and the spacing from the rad. i run the plastic fan about 1" from the rad and the car will stay at 185 while racing and at idle is 170 that is with a 160 T state on allky. I also have a 17" by 21" rad wich is pretty small.

Dirt Freak

Total posts: 219
posted July 01, 2002 08:50 AM
Without the shroud, the fan will pull air from between the fan and radiator instead of thru the radiator. To get around that, you can put the fan 1" fan the radiator, but if there's an "incident" and the radiator moves back a little, than it will be trashed.

If it aint broke, don't fix it, but I have never heard anything good about those plastic fans.

Dirt Roller

Total posts: 11
posted July 01, 2002 11:06 AM
I have run a 15" plastic fan for 4 years
and have never had a problem with it. for the
last year and a half I have run it here in
Phoenix where we hit 115 to 117. No shroud
and run about 205 by the end of the night.
I think the fans you want to stay away from
are the flex fans. Not only are they heavy
as **** , but the fans flex to a point over
time to where they don't pull enough air

Dirt Full Roller

Total posts: 64
posted July 03, 2002 09:13 AM
How 'bout if you're runnin gas? To shroud or not to shroud? Does humidity play a factor? Can you run an aluminum fan blade on IMCA mods?

Dirt Freak

Total posts: 240
posted July 03, 2002 03:56 PM
Hey Olexiewicz,
I have the mod stripped and am making minor repairs to the stuff that holds the body on. So far the car likes the weather here. LOL.

George Gilliland
Dirt Full Roller

Total posts: 39
posted July 06, 2002 06:10 PM
A nice shroud keeps it cool on yellows and line ups. I make mine out of .040 aluminum and they have very little weight. I use the hood to seal the top so that I can still get at everything to work on the car.

Dirt Roller

Total posts: 11
posted July 09, 2002 10:52 AM
Ron, I know thats not true. It's way too
cold. that car likes it around 205 deg. lol.
Hey did that seat ever get there? It should
have been drop shipped there. let me know.

Dirt Forum Racer

Total posts: 78
posted July 18, 2002 10:54 AM
If you have any problems without a shroud try a four bladed old chevy fan ,it pulls so much air it keeps me cool in the line up.Got the idea from a late model team.

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