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TerryBPP's Avatar
 
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Plane motor in a P-car?

I was just curious if anyone had taken a oil cooled air plane motor in a porsche. I don't know much about planes and the size of there engine but if they made a 5.0 flat six of eight it would be fun to shoe horn it inot a car. Maybe a stupid thought.

Old 01-06-2004, 12:29 PM
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I know it was done the other way around. A Porsche engine in both a plane and helicopter. Never heard the other.
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Old 01-06-2004, 12:46 PM
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you don't need a gearbox on a plane , removing one from a car engine is not difficult, mounting one on a plane engine seems more difficult

i think the same applies for air cooling a plane has plenty of air flow up front, and a bigass fan that blows over the engine
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Old 01-06-2004, 01:09 PM
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Do a Google search on Porsche/Mooney.
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Old 01-06-2004, 01:20 PM
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How about a Mustang P51 engine in a '55 Chev? Closest thing I could think of. Took a bunch of Aussies to do it!

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Old 01-06-2004, 01:22 PM
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i guess that's not droppig an airplane engine in a car, but more like cutting car apart, and welding it around the airplane engine
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Old 01-06-2004, 01:36 PM
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Terry,

Airplane motors are designed to run a long time at a very low RPM range, usually below 3000 RPM's. When prop's are run faster than that the tips exceed the speed of sound and do not work well.

Do a search for the "pfm 3200" on the net and you will find the 3.2 Porsche motor that was adapted for aviation use in the Mooney aircraft a few years ago. You can also see them on Ebay from time to time. Recently someone was "given" one and tried to sell it on Ebay as a special car motor. A few of us who have flown them recognized it and advised him what it was.

They were not a success due to the cost and low production numbers and for the most part have been replaced with normal airplane motors.

BTW, Jay Leno was driving a Hispano last week in the LA area with a WW1 airplane motor. "Only" 18 liters and very large, but not something you see very often.

Joe
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Old 01-06-2004, 01:38 PM
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Jay Leno has a 20's Rolls Royce with a P-51 engine in it with something like 1000hp.

As for flat sixes, I believe the power to weight ratio of a Porsche engine is much better than that of a plane. Aviation engines have many redundancies that add weight.
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Old 01-06-2004, 01:39 PM
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Oh, is it a Hispano? I thought it was a Rolls. I read the article years ago, so my memory is probably misleading me.
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Old 01-06-2004, 01:42 PM
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Quote:
Originally posted by catuck
Aviation engines have many redundancies that add weight.
Yeah, but they also save lives in the event of a failure.
Old 01-06-2004, 01:44 PM
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I think someone should stick one of those in a 914. Those guys will stick anything else in the back of their cars!

Hmm, one thought would that make it mid AND rear engined??
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Old 01-06-2004, 01:55 PM
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Actually, being airplane engines the power to weight ratio is excellent.

Here is a table originally researched and posted by Bill Verburg.

Here are the weights of various 911 engines w/ source




kg lbs-- models-- Source

182 400 2.4L E, S, RS 1972-73 Tech. Spec. book

183 403 2.4L T 1972-73 Tech. Spec. book

200 440 2.7L 1975-1977 Aichle - 911 Engines

190 419 78-83 930/09,19,10 78-81 78-81 & 82-83 Tech Spec. book

200 441 78-83 930/03-08,13-17 78-81 & 82-83 Tech Spec. book

190 462 3.0L 1980-82 Aichle - 911 Engines

219 483 84-87 930/20,26 84-87 Tech Spec. book

220 485 84-87 930/21,25 84-87 Tech Spec. book

219 482 3.2L 1987 - 1988 Aichle - 911 Engines

238 524 964 89-94 M64/01,02 ROW &US 964 Tech Spec. book

226 497 M64/03 RS 964 Tech Spec. book

275 605 M30/69 3.3L 964 Tech Spec. book

276 608 M64/50 3.6L 964 Tech Spec. book

232 510 M64/05-08 993 Tech Spec. book

221 487 M64/20 993RS v-ram w/o ZMS 993 Tech Spec. book

230 507 M64/20 993RS v-ram w/ ZMS 993 Tech Spec. book


Here is a link to the Lycoming 360 series engine specs. Note the dry weight. http://www.lycoming.textron.com/main.jsp?bodyPage=productSales/engineSelectionGuide/360.html

For example, your garden-variety 0-360 produces 180 horsepower and has a dry weight of 265 pounds. = 1.47 lb/hp.

When you add fuel injection: I0-360, 200 HP, 293#, or 1.47 lb/hp.

Contrast that with the SC motor- 180 HP, 462#, 2.57 lb/hp. Or the 964, 247 HP, 608#, 2.46 lb/hp.

OK, these don't include headers and probably don't include an alternator or other accessories. But a/c engines, despite their aging 1930's technology, crank out a ton of HP and torque for their size. And dont' weigh as much as you would think.
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Old 01-06-2004, 01:59 PM
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If i could get 1000hp at 3000rpm, that would be nice!! (wouldnt have to worry about oiling problems at high rpms and g-loads.

too bad that RR engine probably weighs 2000lbs!! heck, thats still engine weight to hp rato of 2:1!

Mk

Quote:
Originally posted by Joeaksa
Terry,

Airplane motors are designed to run a long time at a very low RPM range, usually below 3000 RPM's. When prop's are run faster than that the tips exceed the speed of sound and do not work well.
BTW, Jay Leno was driving a Hispano last week in the LA area with a WW1 airplane motor. "Only" 18 liters and very large, but not something you see very often.

Joe

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Old 01-06-2004, 02:09 PM
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