924Board.org

phil924 · Joined: 06 Feb 2003 Posts: 16 Location: Oregon, USA

I'm just curious what the possibilities are for mounting a VW engine (ie A2 Jetta/Golf size) into a 924. Has it been attempted? And what is really needed to make somethin like that happen. I've owned both a VW and an Audi (4cyl and 5cyl) and they both appear to have similar sized engines. It makes me think a regular VW engine would fit right in. So what do the eperts say?
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'77 - 924 NA
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Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

there's a 5 cyl Audi-powered 924 out there, have a look thru the posts in this section.

As for the VW - why bother? Yes they're both 4 cyls but the VW is front-drive and the 924 isn't. Anything out of any A2 platform is going to have less power than a dead-standard 924.

If you're going to do a fantasy conversion at least do something worthwhile like an all-alloy V8 (Rover/Buick or LS3).
_________________
1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)

Learn to love your multimeter and may the search be with you

wdb · Joined: 02 Nov 2002 Posts: 2024

the 2l VW is a direct swap for the 924 engine . the 16 valve versions will give you about 20 more HP add another 10 if you go with carbs . its yet to be proven ,but the VR6, 6 cylinder might bolt up to the 924 bellhousing ,but would need custom motor mounts and the fuel injection from the donor car or custom intake for carbs. the 12 valve VR6 puts out 170 HP and the 24 valve 201 HP

see part interchange link for engine swap info.

http://www.924board.org/viewtopic.php?t=5509&highlight=part+interchange

another discussion about VW motors before it was known that they fit the 924.

http://www.924board.org/viewtopic.php?t=2241

Benski · Joined: 12 Feb 2003 Posts: 4 Location: Pittsburgh, PA

The holes to thread in the motor mounts are not in the correct places on a VW 4 cylinder engine (though they are in the 5cyl Audi). Also you would need to fabricate an oil pan for the VW 4 cylinder. Right now on eBay there is a GTI engine for sale (may be completed by now - checked it out 2/11) with some good close-ups that show the holes you could attach motor mounts to.

The bellhousing probably matches up, though.

Once spring comes, I think I'm going to go out to the junkyard with some gaskets, some mounts and some pictures and see what matches up to what - so we can all stop speculating.

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

wdb · Joined: 02 Nov 2002 Posts: 2024

924 = 115 + 20 =135 ... thats about 20 +/- 1
induction NOISE ? you obviously have not had the pleasure of riding in any american muscle cars ,like the dodge challenger,hemi cuda ,camaro's ,or mustangs of the 60's and 70's with rebuilt ,modified ,and well tuned engine's . hearing those carbs HOWL ,while screaming down the highway ,was music to my ears . and they purred like kittens when idling .

ok maybe the carbs will only add 6-7 hp ymmv.

oh and benski is right about the vw 2.0l motor mounts being different , apperently the hollander manual was incorrect about the vw 2.0l being a direct swap .

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

924 = 125 + 20 =145, I keep forgetting about non-Euro cars.

I suppose the US love-afair with carbs will last forever or at least until the regs allow injectors in nascar

_________________
1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)

Learn to love your multimeter and may the search be with you

wdb · Joined: 02 Nov 2002 Posts: 2024

yeah , its hard to beat the 2hours of labor and $20.oo price to completely rebuild a carb. with the FI you have to FIND the problem , injectors ,there ports for leaks, almost 2 meters of ductwork for leaks , pressure reg, fuel pump ,metering adjustment , fuel/air ratio , fuel distr. o2 sensor, wires .and then half of the time its not 1 problem, its everthing is just slightly off or needs cleaning and tightening , so when you check them all, they look ok individually,and your still not sure whats wrong .

oh and here's the dyno proof that carbs add HP , its for bikes,but the concept is the same .

http://www.moto-one.com.au/performance/900fuelvscarb.html

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

well, yes, they do add horsepower in some rev ranges in that application. Given that we're talking about a sport bike here, the carbs dying at 6500rpm is not what I'd call an improvement but as he says that could be the intake length. When you compare the lumpy power curve of the carbs to the arrow-straight line of the FI I know which one I'd rather be riding.

As he says

phil924 · Joined: 06 Feb 2003 Posts: 16 Location: Oregon, USA

Well you all seem to have quite the responses to why it wouldn't be feasable to even put one in, but I was more interested in whether it would actually fit or not. I have no interest in carbs, and the reason I was wondering is because a friend of mine and I are really into the VW diesel engines and we wondered the possibilites of the 1.9 Litre turbo diesel. Tuned right it could get 95hp but with much more torque. So in the end you'd probably lose some power but gain about 20mpg and still have pretty similar handling. This isn't something i'd be looking to do anytime soon, and I know the majority of you probably think it's a dumb idea, you prefer gas engines, I prefer diesel, that's that. I just wanna know if anyone knows if it will or will not fit, not weather its a good idea or not. Ok I'll shut up now. Thanx for all your help.
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'77 - 924 NA
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Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

ohhhh! You didn't mention you were thinking diesel. The automatic assumption when guys talk transplants is that they're after lotsa powa so a gas VW seemed like a strange idea.

Interesting thought and from what wdb said it sounds quite doable.
_________________
1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)

Learn to love your multimeter and may the search be with you

PORSCHEV · Posted: Sat Feb 15, 2003 9:52 pm Post subject:

If I had an extra 924 car...that needed an engine transplant....thats what I would do! drop in a newer model TDI engine and have a super reliable , feul efficient,great handling car. daily driver of coarse. And anyone that says it can't be done is just lazy and doesn't like the idea. I know a guy who put a 454 big block ina a VW bug!
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1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

phil924 · Joined: 06 Feb 2003 Posts: 16 Location: Oregon, USA

The older (1985 - 1992 [A2]) style diesels are the more fuel efficient ones and they have a much better chance of being mounted up. Much smaller and no electronic crap. My old jetta was sooooo easy to work. Was my very first car and I had zero automotive skills and I changed the transmission in it. Anyway, that jetta was such a fun car to drive, could just fly into the corners, i'm just imagining what it'd have been like in the 924...
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'77 - 924 NA
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PORSCHEV · Posted: Sun Feb 16, 2003 9:34 am Post subject:

I have one of those engines sitting on my shop floor.......just replaced the engine in my 88 Jetta. It is the turbo model too...I was planning to rebuild it anyway...I will have to start thinking about this idea more seriously. I don't think you will worry about smoking the tires too much......but the enigine is rated at 90hp and more torque than a stock N/A model. All the big drag racers NOW talk torque not HP anyway..as that is what gets you moving.

With rising fuel prices..it sounds really good. I know that the Porsche with the 327 in it won't see any long trips with fuel prices hitting 90cents per litre. (regular)
_________________
1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

phil924 · Joined: 06 Feb 2003 Posts: 16 Location: Oregon, USA

If you intercool the vw turbo diesel it'll actually do 110hp easily. My friend is doing that to my old Jetta that he bought from me. Used the turbocharger off of a 5cyl Audi turbo diesel (much larger turbo). If ya seriously do think of doing the conversion let me know how it goes so I know what to do and what not to do.
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'77 - 924 NA
http://server.chatfusion.net/car/