924Board.org

bass gt · Posted: Mon Jan 14, 2008 2:34 am Post subject: Skunk Werks Update

Guy's,

Just thought i would post up some pics of the new engine and ancilliaries in the car. She is up and running, and sounds mint!! needs a proper mapping session, but lots to do before that.
There are a few bits to finish off, but the overall packaging has worked out a treat. Most of the cables you see are temporary affairs, just to get here breathing.
Now with a stock GT turbo, getting the right trim hould be a snap.
And the dry sump system really was worth the hassle. Has totally transformed the engine.

Oh, and for some back ground info if this is new to you, go here http://www.924board.org/viewtopic.php?t=23865

Enjoy

Steve

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Front Wheel Drive is the Devil's work.

tuurbo · Posted: Mon Jan 14, 2008 3:55 am Post subject:

That's so cool.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock.

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Steve, thanks for the pics, looks amazing! I like the detail work on the exhaust manifold, I can imagine a fair amount of thought went into that given the RHD steering.

Excuse my ignorance, but what is being driven by the pulley beside and slightly below the alternator? Is that part of a dry sump oil system?

Second question, is the oil breather on the side of the block capped off? Or is that just a vent straight to the atmosphere?

Really neat stuff, love to see the envelope being pushed.
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1987 951 - M193 Version for Japan

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

pure porn!

what's the belt-driven device under the alternator? AC pump?
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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

sparky · Joined: 27 Nov 2002 Posts: 772 Location: Malta

bass gt... I HATE YOU!

very impressive work! true eye candy

Well done!

but now you have me thinking about how I can make my engine bay a whole lot nicer!

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When the checkered flag drops... The Bull$hit Stops

1976 Euro 924 (The 945)

- Full 951 Brakes/Suspension

1998 Boxster with goodies
2002 3.0 Xtype 4wd sport

bass gt · Posted: Tue Jan 15, 2008 3:46 am Post subject:

Guys,

The pump under the alternator is the dry sump pump. It is driven from a front pulley, and scavenges the oil from the modified sump, and sends it to the oil tank. The front section of the pump draws oil from the botom of the tank, where it has been de-aerated, and pumps it through the oil filter into the engine. The advantage is that there is no way the oil pressure can drop through aeration or starvation. The tank is 5" diameter and 14" tall, so no matter how hard the cornering forces, the ol is always covering the pickup.
Once you dry sump a motor, the block needs to be totally sealed up, as the pump will actually create a slight vacuum inside the engine, which is a very good thing.
So all breathers, must be sealed shut, with only a vent to the catch tank via a one way valve in case the block needs to vent.
This vacuum aids in ring sealing, and generally improves the overall performance of the motor.
I think with the right turbo, this motor would be cpable of 400+ ponies, even more with a bore and stroke to 2.3/2.4 litres.
It will be interesting to see how much boost is needed to achieve my race target. That would be a good indication of the head room available, should i want to go into the unlimited category but without slicks. I suspect the ca would be quicker on the slicks with less power rather than just turning up the wick and overwhelming the chassis with 400+BHP.
I guess there are more than a few of you here wondering why in hell anyone would do this with a little old '24. Well, i love the challenge, and want to create something quite unique. Mission accomplished i think/hope.

Steve
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Front Wheel Drive is the Devil's work.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

I'm glad someone has the knowledge and dedication to push the 924 that extreme. It is amazing. Thanks for the additional info and patience with questions. I've said it before, the UK Porsche magazines (911&PW and GT) should be knocking down your door to do an article on that car. Even Excellence has featured cars outside the US, they should be looking at it as well, it is soooo interesting. Instead, last month the water pumper content in Excellence consisted of a very mild and not very tastefully modified 951, and an article on a hybrid Cayenne. Boring!
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1987 951 - M193 Version for Japan

colin · Joined: 24 Dec 2006 Posts: 103 Location: iowa, US

the cayenne was cool, hybrid proformance cars are new fast and economical and im glade porsche is jumping right on in. but the 951 was a big disipiontment, i think Exellence didnt want to show all their 911 lovers all the potential our four clinders really have.
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1979 924 parting ways
1987 924S
1987 parts car

Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

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1987 951 - M193 Version for Japan

crow.magnum · Joined: 13 Oct 2007 Posts: 50 Location: SOMERSET ENGLAND

very very nice.

N-Dub · Posted: Mon Feb 18, 2008 2:44 am Post subject:

Bass GT, i think you would get along well with Special Tool on the 951 rennlist forums. He built a 602whp 951 with a 2.5 liter for the challenge.
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'79 924 now Totaled! Carrera GT bodywork for sale!
'87 951

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Track buddy of mine did that. . .cost him well into 5 figures. The first 50 HP on a 951 are cheap, the next 50 are not.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

924lad · Joined: 04 Jan 2008 Posts: 26 Location: Norwich, England

Very impressive!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!