I was thinking about adding an 12v. auxiliary cooling fan under the grill vents in my engine bay.
Anyone have any recommendations on a thin fan that could be mounted on the inside?

If anyone has something like this……please post a pix

Thanks,
Michael

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88GT/Auto/Beechwood Leather/SunRoof/Wing/JVC-CD-Sub-Woofer/225/45/17 Michelin Pilots/All Opts Ex.T-Tops

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[This message has been edited by 2000RagTop (edited 07-01-2005).]

Honestly I dont think fans would help,unless you put an oil cooler under the vent with a fan. Also if your car is over heating then there is somthing wrong with your cooling system.

quote Originally posted by richfiero: Honestly I don't think fans would help,unless you put an oil cooler under the vent with a fan. Also if your car is over heating then there is something wrong with your cooling system.

Actually many people have cooling fans under the grills. My car does not overheat at all, I run about 1/4 on the gauge and seldom if ever hit 220 with my V8.

However the engine bay gets so hot that I am afraid it is cooking any electronic parts.

Hit up your local speed shop and look for a nice fan, 10" should do very well. You can normally find thermostatically controlled fans to go along with it. Or just wire it up to an add on fan switch.

I may put a bunch of small fans on my oil cooler just to give it that extra bit of air myself.

One thing you can do to drop intake temps is get your upper exhaust system ceramic coated. This will help a lot with underhood temps.

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85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com

One caution is if you mount one on the left side make sure that your gas canister is air tight, otherwise you might have gas fumes leaking in the same area as the electric fan, (which is an ignition source). Your car could go up in flames pretty easily. That concern has stopped me from mounting the fans.

quote Originally posted by richfiero: Honestly I dont think fans would help,unless you put an oil cooler under the vent with a fan. Also if your car is over heating then there is somthing wrong with your cooling system.

I don't have a problem with my engine overheating, I just want my engine bay to be a little cooler

quote Originally posted by Capt Fiero: However the engine bay gets so hot that I am afraid it is cooking any electronic parts.

This is the reason I was thinking about doing this

and.........jscott1....... thanks for the heads -up on this

[This message has been edited by 2000RagTop (edited 06-30-2005).]

I like the setup Tina has in this post. I will probably just run one off the fan that is already in the trunk.
https://www.fiero.nl/forum/Archives/Archive-000002/HTML/20040223-1-034799.html

How about exhaust wrap as well as the fan, that way you'll drop the temp in the bay and air won't heat up so much prior to induction and you'll get more optimal engine performance.

i put two under the vents of my convertible. i have too much trouble linking post at home but it is titled "convertible comfort" in the tech archives.

i did it 'cause of experiments with keeping the passenger compartment cooler and i though i might have blocked the vents enough that fans might be needed to get air out.

i've since taken them out 'cause they just weren't needed. all the wiring and mounting is still in though, in case i'm ever able to do the swap i've always wanted to do and the bigger engine requires them.

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Phil T.

start where you are,
use what you have,
do what you can. arthur ashe

quote Originally posted by Jake_Dragon: I like the setup Tina has in this post. I will probably just run one off the fan that is already in the trunk. https://www.fiero.nl/forum/Archives/Archive-000002/HTML/20040223-1-034799.html

yeah i've been thingking about that due to the added heat of a turbo

Just a word of caution. You've got the gas vapor canister on the driver's side, and the battery on the passenger side. Both have the potential to emit combustible gasses. Putting an electric fan there may create a fire hazard.

Now, I don't know how big of an issue it is, but I wanted to make sure people were aware of any possibilities.

i was told that when i tried it but haven't had any problems.

if it is a worry you can move both. for another car i needed the area clear for i moved the battery (pretty common) and put the vapor canister about where the cruise control stuff would normaly be.

IMHO there is little chance of an electric fan igniting the small amount of vapour from either your battery or your vapour canister. It is no where near dense enough fumes to ignite.

Look at the proximity of your cap and rotor and spark plug wires. I have seen many a car that had poor wires to the point that at night there wires made a great light show to watch.

If the fumes were stagnant and allowed to build up then hit a spark it might have a chance of making small flame ball, but a running fan will dissipate the fumes before they can become dense enough to worry about.

Side note,

How many Front wheel drive cars have electric rad fans and have there fuel vapour vans in the front of the car.

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85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com

you could always do it like this...

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fph6666,

So that would be a hoover car?

2000Ragtop,
take a look at Summit # PRM-19810. this is a 10" high flow fan that I use with very good results. Mine is mounted in the side panel near the old battery location, but the same fan would work fine as you discribe.

darn and I just put mine in the stang scoop

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88 GT, 3800SC, Getrag 5sp. Custom

quote Originally posted by Russ544: fph6666, So that would be a hoover car? 2000Ragtop, take a look at Summit # PRM-19810. this is a 10" high flow fan that I use with very good results. Mine is mounted in the side panel near the old battery location, but the same fan would work fine as you discribe.

Thanks for the info......that's a bad part #. It ended up being part # PRM-19010 thanks

quote Originally posted by 2000RagTop: Thanks for the info......that's a bad part #. It ended up being part # PRM-19010 thanks

Oops. sorry.. you're right on the part # I need to ck my glasses again

quote Originally posted by Russ544: Oops. sorry.. you're right on the part # I need to ck my glasses again

lol.......I know the feeling ....Especially at night LOL

quote Originally posted by revin: darn and I just put mine in the stang scoop

What are those a punch of 80mm Case fans. I like the idea, hmm, blue or red LED case fans in seris. Hmm.

quote Originally posted by Capt Fiero: What are those a punch of 80mm Case fans. I like the idea, hmm, blue or red LED case fans in seris. Hmm.

I think that would be cool if you could get the outer most fan to flash its LEDs with your turn signals. I dont know much about LED fans though. Are the LEDs on whenever the fan is turning or can you turn the lights on or off?

The leds in the computer case fans are hard wired to the power source, so you could modify it if you wanted, but it'd take a ton of work. Also - it'd look goofy :/

i'd tend to think that they would cook - not designed for that high of temps

Computer case fans can run 25,000 hrs @ 100F I am pretty sure they can handle a fair bit more heat than you give them credit for. I might try an experiement feed a fan 300F temps and see what it does. I wonder how hot a heat gun will get.

The housings and blades on most computer fans are made of ABS plastic. ABS can only handle temperatures around 150F degrees before it starts to soften and deform. It will start melting around 200F degrees.

[This message has been edited by Blacktree (edited 07-01-2005).]

Revin's had his there for a while now, it doesn't look warped.

Nope never a problem with heat.
Yes just simlpe case fans. With a wing, you can barely see them inside the scoop.

When the Fiero is cruising a fair amount of air will move through the engine compartment It comes from below the engine and exits through the engine vents at the sides of the deck lid. The only way to remedy excessive heat is to have your exhaust manifolds and crossover pipe coated with ceramic metallic Jet Hot Coating. You could also wrap it with heat insulation but this will decrease the life of the exhaust parts by quite a bit. I view addding fans below the vents as being potentailly harmful as they would be a restriction to air flow at highway speeds.

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87GT 3.4 Turbo- 0-60 5.2 seconds -Best
Engine Controls, ECM goodies, Chip
re-programming & odd electronics stuff

You do not discuss what problem, if any, you are trying to correct. If you car is running a little hot, why not just install a lower temp fan switch and thermostat. Rodney Dickman sells these. That is much easier than installing a cooling fan.

quote Originally posted by PontiacFiero: You do not discuss what problem, if any, you are trying to correct. If you car is running a little hot, why not just install a lower temp fan switch and thermostat. Rodney Dickman sells these. That is much easier than installing a cooling fan.

. thanks, I do know of Rodneys switch/thermo......."I just like moving hot air"

quote Originally posted by richfiero: Honestly I dont think fans would help,unless you put an oil cooler under the vent with a fan. Also if your car is over heating then there is somthing wrong with your cooling system.

I don't have a problem with my engine overheating, I just want my engine bay to be a little cooler

quote Originally posted by Capt Fiero: However the engine bay gets so hot that I am afraid it is cooking any electronic parts.

This is the reason I was thinking about doing this

[This message has been edited by 2000RagTop (edited 07-02-2005).]

quote Originally posted by revin: darn and I just put mine in the stang scoop

Revin helped me out. I bought, at the surplus electronics store, 8 brushless computer fans, 12v, .15 amps.

I took them out of their mounting brackets and mounted 7 of them across my six pack scoop holes. They are controlled by a two channel Derale fan control unit. The fans cost $2 a piece and the Derale system about $65. I can dial in my fan switch to anywhere between 150* and 250*.

So far it works pretty well.

Arn

quote Originally posted by Capt Fiero: What are those a punch of 80mm Case fans. I like the idea, hmm, blue or red LED case fans in seris. Hmm.

Wire them in parallel, not series.

quote Originally posted by Arns85GT: Revin helped me out. I bought, at the surplus electronics store, 8 brushless computer fans, 12v, .15 amps. I took them out of their mounting brackets and mounted 7 of them across my six pack scoop holes. They are controlled by a two channel Derale fan control unit. The fans cost $2 a piece and the Derale system about $65. I can dial in my fan switch to anywhere between 150* and 250*. So far it works pretty well. Arn

Well, it works well at street speeds, but not on the highway. I did some research today. It is posted in the technical forum. I may be going to some more serious fans.

https://www.fiero.nl/forum/Forum2/HTML/064636.html

Arn

Ahhh, the curse of the rising temp in the engine bay.
Not bad if you are moving, but at slow speeds, higher rpm ...
Bring on the eggs and bacon, we are doing are own "To go" while we are not going anywhere in traffic.

I added mine about 2 years ago, passenger side grill.
(Seemed the better choice, considering the lack of space in the area)

What you will need to do this is, is the fan. Part # PRM 19010
For about 5 bucks more, it seemed like a bargain
( 400 cfm more than the Summit fan and it is reverseable)
1. I mounted mine with fan mounts facing the interior of the engine bay.
Just a little added insurance to keep things out off harm/fan blade's way.

2. Also you will need some small strips of metal to be able to mount the fan housing to the back side of the grill.
3. Mine are welded to the housing and then screwed into the grill.
4. The fan itself itself was wired in such way, that even with the ignition off the fan still has power .
Ended up using a adjustable thermal switch, I get the beni''s of the thermal control as well as a manual override.
Part # rpm 19001 for the wiring kit, 18905 for the adjustable sensor or 18907 for the adjustable thermal switch.

Now here comes the disclaimer ... if your engine is running too hot, this is not going to make the difference.
... if you went with the regular wireloom, it might still melt in places.
And ... I am not going to get in the middle of what is better. Having the fan blow the hot air out, or sucking cold air in.

Tina

Do yourself a favor and put them on a oil pressure switch. Engine fire = blast furnace otherwise.

quote Originally posted by Arns85GT: Well, it works well at street speeds, but not on the highway. I did some research today. It is posted in the technical forum. I may be going to some more serious fans. https://www.fiero.nl/forum/Forum2/HTML/064636.html Arn

Well I will say this...

1. Mine is on a fastback ( not sure if that has anything to do with it)
2. I have the scoops on the rear side glass (also adding in moving the air around)
3. Yes the test strips you used seem way to long and heavy for that type of test.
4. I think you have OTHER issues with the rad. or the thermostat to ease your high temps.

But if you think that the bigger fans will work for ya go for it. My idea for the scoop fans is just to aid in the hot air extraction.
My 3800sc stays at 160* in traffic, racing or stop lighting. good luck on whatever helps ya!

I have always thought that if the cooling system was set up right with an engine swap, extra cooling wasnt needed.

Bigger radiator, HO waterpump, more powerfull radiator fan, and scoops... wont do it?