924Board.org

Horizonblue

Well, I've been searching this board and some other forums, and a few has started a VR6 swap, but it seems like all the threads has suddenly died. So I'm asking: is there a 924/944 VR6 running somewhere?

To me it seems like the perfect engine for a swap, instead of a heavy SBC V8, where you have to ditch the brake booster. In my country, the car would never be street legal without the original booster.
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Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

Raceboy · Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe

It would be much easier just to boost the stock engine and it would still be a Porsche afterwards.

You just swap the same lousy engine technology (Heron style combustion chamber with flat head) but with two more cylinders into your 924.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
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morghen · Joined: 21 Jan 2005 Posts: 9080 Location: Romania

you dont need the VR6...you can use the audi V6.

VR was designed to be a transversal mounted engine. mount it longitudinally and you'll work alot to balance the car.
+ its not that great...170/190 hp...you get that from a tuned 2.5 easy.
or from a 2L turbo.
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Supercharger and EFI kits
https://www.the924.com

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

I'm not that fond of the AAA engine.
_________________
"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

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

What about the other VR6 derivatives used in the Tourag, Cayenne and R32? Seems like they managed to get 250hp out of one.

I wouldn't dismiss them outright, but I still feel that the Audi 20-valve turbo motor is a better ultimate solution for the 924 as they are very similar motors so it ends up being an "easier" engine swap all things considered.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Cedric · Joined: 27 Aug 2004 Posts: 2761 Location: Sweden

To bad its such a heavy engine, performance wise there are better engines, but the sound of a 3.2 with fewer mufflers is really a special thing that a 4 pot never will get. But its a lot of work for a heavy lump och iron at the front

Boosting the original engine is as raceboy said probably the wisest choice for performance..
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1980 924 Turbo
www.instagram.com/garagecedric/

Horizonblue · Posted: Mon Nov 07, 2011 6:56 am Post subject:

I agree that the wisest choise for more performance would be a turbo/supercharger. If I was going to do a VR6 swap, it was not necessarily for building the fastest 924 ever. It was more for the fun of having a 924, that no one else has.

These days I'm considering a Megasquirt on the original engine(with a custom made stainless steel intake manifold), but wondering how much of a job it would be to do a VR6 swap instead.

When I'm driving in the car, I'm actually quite happy with the 2,0 engine. I also like the fact that it is a simple engine from a mechanical point of view, the 944 engine is more complicated.

But I'm still wondering how it would be to drive the car, with a 6 cyl engine in the front.

_________________
Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

morghen · Joined: 21 Jan 2005 Posts: 9080 Location: Romania

you can make the VR6 turbo and get 500-600 hp

the VR6 sounds very nice...honestly it sounds like the 924 should have sounded coming from the factory.

when i come to think about it...its not such a bad ideea....its a VW unit...parts are fairly cheap and you can find them anywhere.
power is decent....and with a simple bolt-on-ish turbo kit you get 300HP EASY from this engine. or 200HP with minor NA tweaking

For the 924 2L NA to make 2/300HP you need to do alot of work...and it will never sound like the VR6

then again...if you make the 924 VR6 turbo...you need gearbox, brakes,torque tube, suspension...so its a complete rebuild

but if you keep it NA then you can get away with minimal changes.
_________________
Supercharger and EFI kits
https://www.the924.com

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

in that line of thought, I would go for a 20v turbo engine from audi. Can't beat the 5cyl sound and it will probably fit even better than a vr6.
_________________
"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

Horizonblue · Posted: Fri Nov 11, 2011 7:44 am Post subject:

A 5 cyl swap would probably be easier, yes, since the bell housing pattern is the same as the 924. But I have a weakness for 6 cyl engines.....

The VR6 has a different bellhousing pattern and needs therefor an adaptor. The starter on the VR6 is also located at a silly place. I know that 034 motorsports makes almost the parts needed for bolting the VR6 engine to the 924 (016) bellhousing (adaptor, starter, flywheel etc), but these parts are quite expensive. I can make them myself(even though it will take some time), so I'm not willing to pay a fortune.

This winter I will pull out the old engine. I have a 1984 engine laying around and it has been a plan for some time to install that one. The old engine does have a little knocking when cold. If I could obtain a broken VR6 engine for almost nothing, I would like to lower it into the engine bay, just to see if that project looks hopeless.

If it looks hopeless or somebody talks sense into my head, I will install the 1984 engine and look into an EFI conversion. I have already been fabricating some of the hardware needed; injector bungs, stainless steel fuel rail and an intake manifold flange, 10 mm stainless steel.

I would like to make my own intake manifold, so I've been drawing a few lines, not finished yet. (3D SolidWorks)

The flat surface on the front, could be mounting place for a coil pack.
_________________
Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

bizzyfingers · Joined: 10 Jun 2012 Posts: 4 Location: England

Did you get any further with the VR6 idea? I am toying with it myself.

Horizonblue · Posted: Mon Sep 24, 2012 4:31 pm Post subject:

the_mad_electrician · Joined: 16 Nov 2009 Posts: 1073 Location: Central Georgia

I'm sure it has been asked but does the 3.0 Audi have the same bellhousing pattern? Even if it doesn't fabbing a bellhousing would not be much more work than any other swap considering you have to build headers and an oil pan for most swaps.
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81 924 N/A

2004 Ranger "Edge"

2005 Mazda 6

the_mad_electrician · Joined: 16 Nov 2009 Posts: 1073 Location: Central Georgia

It was also discussed about a 2.8 swap. Some said it was too heavy with too little power gain. But the 12v 2.8 has a touch over 170hp and the 30v 2.8 has 190. And they have to weigh less than a SBC. The biggest issue is that funky flywheel the 2.8 uses.
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81 924 N/A

2004 Ranger "Edge"

2005 Mazda 6

Horizonblue · Posted: Wed Oct 03, 2012 8:19 pm Post subject: