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rdane's Avatar
 
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'91 3.8 turbo questions?

I looked at this local car yesterday.

http://www.parkplaceltd.com/vehicle.aspx?stockNo=6349&title=1991%20Porsche%20911%20Turbo%20-%20739hp%202%20Dr%20Coupe&inv=330&vin=WP0AA2964MS480221&pos=36&current=1&size=50&nav=All&filter=(Make='PORSCHE')


Dyno says: ChipC2 turbo Euro 8 (I assume that means a chipped 3.8) w/EFI

Torque is 606# @ 5800 and peak HP with 15.5 boost at 7500rpm
new injectors @ 60 psi and 1 bar boost

(14.5# =1 bar ? )

So turbo guys tell me what you really think? Grenade waiting to explode or monster car? How should the engine have been built to stay in one piece? 7500 redline? Isn't that unusual and fairly extreme? 15.5# boost ?


I know nothing about turbo engines and need a quick education. I should have a copy of the engine build sheet later today. Thanks for the help.
Old 05-14-2007, 07:07 AM
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Well not much info on the engine? What management does it have? In 91 those were still 3.3 cis engines so kind of curious what its got in it for goods. this is totally plausible just more info
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Old 05-14-2007, 07:31 AM
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There was a big write up on this car over on rennlist. I think the power claims are legit, and that it was built very well. I belive the owner passed away.

If I remember correctly is fuel injected and runs an Electromotive ingnition system. I remember seeing pictures of the coil packs mounted on the package tray in the rear.

I think it is defintely worth a look if you are interested in something that ungodly fast.

Bill
Old 05-14-2007, 11:26 AM
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It looks to be a solid car- being a 3.8 means that the motor was origonally a 3.6, therefor the 3.3 motor was swapped out. I would not run it much higher than 15.5 p.s.i because most 3.8 conversions are the slip-in cylinders and are not the best for handling the higher boost levels. If you are really interested, go and ask for reciepts or ask the builder of the car what it has if no receipts are availible. Ask for a leak-down and compression test becuase whoever built this car built it to get the $h!t beaten out of it.
Other than that, it looks very cool.... I just cant deal with the color though
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Old 05-14-2007, 04:11 PM
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http://www.youtube.com/watch?v=DMCvyjNqRho

Dane.. it would be nice to have this passing power!
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Old 05-14-2007, 05:45 PM
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What a rush Erik. I have just what you need to experience that same thrill, a la 930, a Zork tube. Shoot me an e-mail if interested. I think I'll slip one on for the Friday ritual 930 commute to work - through the mountains.

If memory serves the conversion factor for PSI/bar is 14.7, so 15.5psi = 1.05bar
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Old 05-14-2007, 05:57 PM
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Quote:
Originally posted by Erik Mckenna
http://www.youtube.com/watch?v=DMCvyjNqRho

Dane.. it would be nice to have this passing power!
Oh Yeah! A 3.4L version of that motor is being built for my 934 replica by Bill Rudtner...the owner and driver of the car in that video.

Cleve
Old 05-15-2007, 04:42 AM
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Re: '91 3.8 turbo questions?

Quote:
Originally posted by rdane
I looked at this local car yesterday.

http://www.parkplaceltd.com/vehicle.aspx?stockNo=6349&title=1991%20Porsche%20911%20Turbo%20-%20739hp%202%20Dr%20Coupe&inv=330&vin=WP0AA2964MS480221&pos=36&current=1&size=50&nav=All&filter=(Make='PORSCHE')


Dyno says: ChipC2 turbo Euro 8 (I assume that means a chipped 3.8) w/EFI

Torque is 606# @ 5800 and peak HP with 15.5 boost at 7500rpm
new injectors @ 60 psi and 1 bar boost

(14.5# =1 bar ? )

So turbo guys tell me what you really think? Grenade waiting to explode or monster car? How should the engine have been built to stay in one piece? 7500 redline? Isn't that unusual and fairly extreme? 15.5# boost ?


I know nothing about turbo engines and need a quick education. I should have a copy of the engine build sheet later today. Thanks for the help.
Okay, as far as the redline being 7500 rpms, that is what typical 3.6 block rebuilds will have with a good set of lightweight valves and also good rods, so that is not a problem. The reason they stop at 7500 is that the engine runs out of breath and there is just not anything to be gained from revving higher.

Running one bar of boost is fine if the set up is correct.

The only thing I would want to know about that particular car is how much track useage is on the engine and drivetrain. And if you can stand the color in person. The purple interior may be darker in person, so it may look better than in pictures.

That car would be a lot of fun, potentially, but if you need to work on it than you may want to find a mechanic that can handle modified Porsches, not just your average Porsche dealership. I would do that in advance.

The car has been on sale for a long time, so I would haggle down the price but first I would make sure that you find out the real condition of the engine and find somebody that will work on it for you. Test drive it under normal road conditions for a while to make sure the EFI works under differing loads. Don't be blinded by the sheer power, you want to remain objective if you test drive it, and try to assess the health of the engine.

I wouldn't have a problem buying it if everything checks out. At some point, the dealership must be anxious to get rid of it. You may be getting a once in a lifetime ride. But you need a mechanic.
Old 05-15-2007, 07:50 AM
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You may want to read this thread: http://www.6speedonline.com/forums/showthread.php?t=83342
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Old 05-18-2007, 01:17 PM
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Me like track days
 
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Dane, your car is waiting for you.....still:

http://www.parkplaceltd.com/inventoryDisplay.aspx?s=blank_detail&year=1991&make=Porsche&model=911%20Turbo%20-%20739hp&inv=282&vin=WP0AA2964MS480221&total=51&pos=36&current=1&size=50

Down to 49k asking price
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Old 01-21-2009, 12:47 PM
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OFF THE BOOST PIPE NOW...
 
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This car has been discussed ad naseum, but I'd have to look at the car in person to see if I could live with the purple exterior. Maybe it looks better than the pics?

On the other hand, I think the interior either needs to go completely or at a minimum, start swapping pieces for black to make it look better.
Old 01-21-2009, 01:25 PM
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I came close to flying out to Seattle last Spring to take a look at this car and possibly make an offer and called Park Place several times about the car, they were helpful and honest. But in the end did not proceed. If you do a search you will be able to read an interesting 2page thread on this car.

Yasin
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Old 01-22-2009, 06:18 AM
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