Use your A/C to cool your engine!

porschenut · 03-24-2006, 11:11 AM

I was just daydreaming about ways to increase engine cooling in my 3.2, and I'm wondering about the potential effectiveness of using the A/C blower output in various ways, such as:

1. Redirect the blower output from the smuggler's box to the front oil cooler instead of the car's interior.

2. Relocate the AC evaporator/blower to the engine compartment where the heater blower normally is. Since you don't need heat in the summer, that stuff can come out anyway. Connect the blower output to the heater tube connected to the fan shroud. Not only would cold air be added to the fan’s airflow, but the blower draws hot air out of the engine compartment and circulates it through the evaporator.

3. Do #2 above, and also add Grady's Rubbermaid Solution by inserting a misting nozzle into the cold air stream as it enters the shroud area. And since your smuggler's box is now empty, use it to house the Rubbermaid water supply.

4. Instead of blowing the cold air on the engine, instead connect the blower output directly to the horn on the airbox cover, thereby feeding it cold intake air even on a hot day.

The A/C plumbing for the evaporator relocation would require a short 3' run from the compressor to the evaporator, and a longer run from the front condensor to the evaporator.

Any of these ideas have potential?

bigchillcar · bigchillcar's Garage

dave..tell the truth..your unemployed right now, man..

ryan

BrokeMyCar · 03-24-2006, 12:03 PM

... in this house, we obey the laws of thermodynamics! ...

(no AC, but installing a fan on the oil cooler is workable)

(added thought - we keep calling our cars air-cooled, but are they not oil-cooled?)

kodabear · kodabear's Garage

Quote:

Originally posted by BrokeMyCar
... in this house, we obey the laws of thermodynamics! ...

(no AC, but installing a fan on the oil cooler is workable)

(added thought - we keep calling our cars air-cooled, but are they not oil-cooled?)

Really think so huh, why don't you disconnect your air cooling fan for some more horse power, and your car will be faster! Let us know the results

BrokeMyCar · 03-24-2006, 12:13 PM

Can I disconnect my oil cooler then?

bigchillcar · bigchillcar's Garage

Quote:

Can I disconnect my oil cooler then?

sure..the auxillary!

ryan

RoninLB · 03-24-2006, 12:28 PM

Quote:

Originally posted by porschenut

I was just daydreaming about ways to increase engine cooling in my 3.2,

am I correct to assume your engine is hotter than you'd like especially when zipping through the mountains ?

Describe a scenario.

Duckworth · Duckworth's Garage

...I think #3 has good bang for the buck.

But consider going with a nalgene-tank of say, 12 - 15 gallons...That would increase your capacity. It would eliminate the cords (bungee) especially if it was a factory look molded fabrication - fitting the 911 bonnet shape perfectly.

BTW, there are many more threads on this board 'inviting' more heat - not less. Hopping up a motor almost always produces more.

If you dissassemble the motor and drop the compression from 9.8 to
9.0 - you would achieve some benefit in cooling the motor. A few guys here would be unhappy at 8.5 or 8.0. UNLESS, they lost a MAJOR amount (3-400) pounds out of the car. Probably, you could live quite nicely running 8.0 to 1 compression at 1800 lbs.

What 911's really need is a kind of ultrahightech solar 'still' that could help replenish some of the supply of water for your mist. From what I know of stills, they tend to produce only a few ounces of water at a time.

Phil
_________

'74 fiat 128
'80 928
'82 Targa - sold

Grady Clay · 03-24-2006, 12:45 PM

Guys,

Give Dave a break for “thinking outside the box.” This is where wonderful ideas come from.

I think all the engineers should calculate the HP benefit from cold intake air compared to the HP cost of running the A/C in reverse. My gut (thermodynamic) reaction knows the answer but I would like to see it on paper before dismissing Dave’s proposal.

Of course my two favorite (sucessful) solutions are the engine cooling fan ratio and the “Rubbermaid Solution.”

Best,
Grady

Jack Olsen · 03-24-2006, 12:47 PM

You can generate a refreshing breeze in a hot gymnasium by running some laps.

bigchillcar · bigchillcar's Garage

Quote:

Give Dave a break for “thinking outside the box.”

dave..have a box 'o brakes on me..

ryan

BrokeMyCar · 03-24-2006, 01:00 PM

There's a real shortage of hot tea while I'm driving - how about using the oil-cooler's heat to boil some water that's accessible from the cabin, while simultaneously running my engine cooler?

Babak

ianc · 03-24-2006, 01:28 PM

Quote:

But consider going with a nalgene-tank of say, 12 - 15 gallons...That would increase your capacity.

Yeah, and increase the car's weight by 100-125 lbs!

ianc

bigchillcar · bigchillcar's Garage

a little over 2 hours and we STILL have failed to re-engineer the car's ability to dissipate heat to any appreciable degree! we must need more minutes..we'll get there..

ryan

RoninLB · 03-24-2006, 01:53 PM

I suspect driving technique is a possibility. I had to learn to adjust gearing during Rocky Mt rides. A CHT was a big heads up that registered way before oil temps. Once the oil was hotter than desired it was a pia to cool down.

bigchillcar · bigchillcar's Garage

umm..yeah..i crunched the numbers..and..uh..what jim said!

ryan

porschenut · 03-24-2006, 06:56 PM

Quote:

Originally posted by Grady Clay
Give Dave a break for “thinking outside the box.” This is where wonderful ideas come from.

Thanks for the support Grady. Actually, I have a few more "outside the box" ideas but I don't want to risk any further ridicule! One of them involves using the ice maker from my fridge.

RoninLB · 03-24-2006, 07:21 PM

what about my question.. huh?

Jon Merck · 03-24-2006, 07:42 PM

Quote:

Originally posted by porschenut
Thanks for the support Grady. Actually, I have a few more "outside the box" ideas but I don't want to risk any further ridicule! One of them involves using the ice maker from my fridge.

You guys are ruthless! This is were some the best ideas come from...

ducking... You know Edison had an idea....

porschenut · 03-24-2006, 07:55 PM

Quote:

Originally posted by FSTNBLK
You guys are ruthless! This is were some the best ideas come from... ducking... You know Edison had an idea....

Yeah, you tell 'em. Einstein's school teacher told his parents he'd never amount to anything because he was dumb! Or something like that.

If conventional wisdom and popular notions were never challenged, there would never be any advancement. I challenge conventional ways of thinking all the time. Ya win some, ya lose some.