Radiator and Electric Fan

[magwakeenercew2jh]

Can any of you guys give me some direction on what is the best set up on this?

'83 Stepper with a 350 transplant, which came with a new 4-core radiator. I guess the fan shroud wouldn't fit, and the guy said, "either big-block fan shroud or electric fan set up".
I'm not going to question why small block to small block caused the shroud to not fit, because I wanted to go to an electric set-up anyway.

So, the question is, what is the hot set-up (no pun intended). I need to have a temp (on/off) control, too.

Thanks.

Starting all over again...This time with an '83 ...That time it was a '72.

[swb85]

I run an aluminum shroud and single 16" s-blade fan, along with a Be Cool thermal switch/relay that turns the fan on at 195* and shuts off at 175*. It pulls enough air to cool my 383 sitting in traffic in 105* ambient temps. You'll want to upgrade to at least a 100amp alternator for an electric setup if you don't already have one. Any fan worth a crap is going to pull significant amperage.
I'm into my setup for just under $200. A couple budget options would be a Mark VIII fan (big airflow, cheap & all over ebay), or a pair of LS1 fbody fans. Both will require some sort of relay & thermal (or manual) switch to operate.

[pcmcobra]

Here's my setup on my 86:





LS1 fans off ebay/hawks thirdgen $50, flexalite controller $90 from summit, some angled aluminum stock from metalsdepot.com $12, $5 worth of hardware from home depot.

These things move some air. You could go with a less expensive contriller, there are several good ones out there, I bought the flexalite on a whim, but it works great and has some nice features.
This pic is from when I got the brackets on, and was just fitting the rad/fans back into my truck, I'll try and take some "finished" pics later.

[magwakeenercew2jh]

Nice. Thanks, Guys.

If you have any more tips on the thermal controller and connections, etc., I'm a sponge for your knowledge.

[swb85]

You'll have to pay for them (usually 70-90 bucks), but IMO it's really hard to beat the pre-made controllers like the ones pcmcobra & I both have. All you do is give it 12v and a ground, the wires are labeled so it's nearly impossible to screw up. I hate wiring, and doing it this way is soooo much easier than piecing relays & switches together.

[Pyrotechnic]

My dad played hell with a Flexalite VSC on his 2002. It worked decently at first but it was extremely unreliable. After that he bought a harness from Nelson Performance that connects to a pin on the PCM and uses relays to trigger the fans and since then it has been very reliable.

I like the kits that use a temperature switch that screws into the water jacket on the head or intake to trigger a relay, or two relays if you are using dual fans. I would add a manual switch as well, which only takes a switch that grounds out the temperature sensor wire.

[hardline_42]

I have the Mark VIII setup on my '81 Camaro and will be doing it again on my '87 SWB. I used a DC Controls fan controller which comes with all the hardware you need including a thermostat to wire it so you avoid voltage spikes. It ramps the voltage up slowly and the fan has never gone full speed (not really needed). I've also heard good things about the Spal controller. Coupled with the aluminum radiator I'm canibalizing from my '71 K20, this thing is gonna run super cool.

[C&C Chevy]

Originally Posted by hardline_42

I have the Mark VIII setup on my '81 Camaro and will be doing it again on my '87 SWB.

Mark VIII? Could you clarify, please.

[Pyrotechnic]

Lincoln Mark VIII

[C&C Chevy]

Any specific years for those fans?

[hardline_42]

Try eBay:

http://shop.ebay.com/mark-viii-fan_W...kQ20viiiQ20fan

For the controller (or the whole kit with a brand new fan) try DC Controls:

http://www.dccontrol.com/

The p/n is : F8LH 8C607 AA

Theres some good reading here: http://www.geocities.com/smithmonte/...rkVIII_Fan.htm