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Author Topic:   Fans, Shrouds & Pulleys
Deak-Jr
Dirt Roller

Total posts: 15
posted April 21, 2003 12:00 PM
Another "Low-Buck Racing For Dummies" question (and I'm full of 'em):

We've got a stock 350 in a metric Monte. Re-fabbed a pretty serious and good shroud from the boneyard, the fan will be well within the shroud and probably around 4+ inches from the radiator (hence the shroud). I've got the top ducted and plan to do the same w/the sides and bottom (probably w/some old discarded LM nose plastic cut down).

Right now we have a 1-to-1 pulley setup, but will most likely get some reduction before the end of the year (or sooner depending on how the pump works while spinning like a mo-fo).

I guess my question is: I'm probably going to go w/a 6-blade metal fan from Summit (the $20 variety). I haven't heard too many good things about the flex fans, and I don't think I want to run a clutch fan even though it's a bomber.

Are we in the ballpark here? Is it gonna slush the water as opposed to moving it with 1-to-1 pulleys? Will it move enough air? (Front belt circles pump & crank; back belt grabs both plus power steering pump; got the top 2-groove pulley off an old Camaro and re-drilled to fit -- I believe the bottom is stock.)

Also, what's a good boneyard combo to get a little low-buck reduction while running two-groove pulleys?

Any ideas are greatly appreciated as always; this is one heckuva forum.

After that, I'm gonna have to figure out how to properly mount a Metric Rectabular Excrusion Bracket onto my Pneumatic Catalytic Inverter sytstem. I saved all the bearing grease from the stock woofers before stripping the interior ....

[This message has been edited by Deak-Jr (edited April 21, 2003).]

rico 08
Dirt Freak

Total posts: 372
posted April 21, 2003 12:15 PM
The older two groove pulley that's 6 7/8 inch dia part #3956666 and the upper 7 1/8 inch part #3989305 are the ones that underdrive the accessories slightly,good luck finding them,they are very hard to find anymore.You're setup sounds good but you didn't mention any type of thermostat or any restrictor,i myself use a restrictor i've had the best results with one.If you run without one better keep an eye on the piston return springs.

Deak-Jr
Dirt Roller

Total posts: 15
posted April 21, 2003 01:37 PM
We've got a thermostat (not gutted) in right now ....

... and we ditched the piston return springs. Found out from a Bazooka Joe gum wrapper that Ziploc baggies filled with hydraulic fluid was the way to go. Of course, we had to wrap the bags in NASA heat-wrap ....

[This message has been edited by Deak-Jr (edited April 21, 2003).]

racer17j
Dirt Forum Champ
Total posts: 1565
posted April 21, 2003 07:35 PM UIN: 54865418
put that fan on there and gut your thermostat and leave everything else along unless you plan on running alky you don't want reduction pullies

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