924Board.org

[Cbass]

I haven't heard much about 1.8 turbo swaps here. It seems like a logical swap to do, same basic size, slant, all the modern goodies.

I have been told all the bellhousings are the same for Audis and VWs since the 70s, so wouldn't it be possible to mate the 1.8T and it's clutch to the torque tube?

The two difficulties would be mounting it, which I'm fairly confident I could do, relying on my past experience, and the wiring, which my brother could do relying on his past experiences.

It might just be crazy enough to work.

[Richard]

What's the torque and HP look like. Do you gain more by losing displacement with this motor as compared to a 924 turbo?

[ricomartinez]

Are you kidding me? That thing is awesome! 150hp @ 5700, 155ft-lbs @ 1750-4600. TWENTY-EIGHT hundred and plus rpm's at 155 ft-lbs of torque!

The new ones are 180hp and 174ft-lbs! Don't know rpm's, but it's probably as broad as the earlier one. Some of the VW/Audi tuners on the web say that 200hp is but a chip away. This thing in stock form would probably get better mileage than the N/A's in stock form too.

[Cbass]

I can guarantee it would get better mileage, the 20V 1.8T is a very efficient motor.

It also makes 225hp in the Audi TT. The TT has some different intake parts, and a bigger exhaust turbine on the turbo.

I have also seen these motors reliably tuned to as much as 500hp. They are beautiful motors.

[Benski]

Anyone know how much one of these motors would cost used? Or know of a good place to get them?

The best thing to do would be to get an empty engine block from one. That way you could try to figure out if it mounts and if not how to fabricate it - and without the annoyance of a large heavy engine.

I've got some spares 924's and have been dying to use one as a guinea pig. I just need a cheap 1.8t engine core to mess with to see if it works!

[Cbass]

The downside is that they are very new motors. The upside is that VW puts them in almost everything they make, and the aftermarket community for them is HUGE.

I'm sure it wouldn't be to hard to find a wrecker who doesn't think a 4 cyl from a VW is worth a lot. You can get one new for about $6000. I figure a cost of about $2000-$4000, depending on who you get it from, and what you get it with. Find a good wrecker, and get the radiator and all the accessories.

I am opening up my shop in about 2 months, and this will be my first project.

[Benski]

CBass,

I found some pictures of VW engines online. It looks like there are lots of holes (including the holes our 924 uses) but it needs double checking.

1.9l turbo diesel
http://www.maesco.com/products/vw_engines/vw_ade/vw_ade.html

1.8l gas
http://www.maesco.com/products/vw_engines/vw_adf/vw_adf.html

1.9l diesel
http://www.maesco.com/products/vw_engines/vw_adg/vw_adg.html

I know that the 20v 1.8turbo drops into the older VWs, so I assume it's got the same mount hookups. The question to ask: does our 924 engine has threads for the engine mounts in the same place? (and would other VW engines have those threads even if they didn't use them).

cheers,
benski

[Cbass]

Well, we can't hope for everything. The 1.8T won't mount in a 924.

However, with a little bit of cutting and welding, it will. Further more, once I've done this, I think I'll offer a kit, so anyone who wants one can do it.

God I love the prospect of running my own shop.

[81turbo]

Just get a 931 and do a front mount intercooler and a boost controler. if you do a good job you will maintain your Porsche power plant and make 200+ Hp with not all that much work.

[Cbass]

Yeah, but 931s can be hard to find, especially ones that aren't horrible money pits.

There are lots of NA's out there, and a cheap parts car to play around with can be had for less than $1000

[Paul]

Just wondering if you ever determined if the Audi TT motor would fit. My wife has the 225 hp version of this motor in her TT.

Wonder if she would notice if I borrowed it for awhile?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[CBass]

While I haven't confirmed this with my own eyes, everybody seems to agree that the Audi and VW bellhousing patterns are common. I have no idea if a 924 driveshaft will fit into the pilot bearing of the 1.8t, but it stands to reason that it could be machined into working. Even if the VW input shaft tip is significantly smaller than the vw's, a machinist could make a spacer to fit a 924 bearing.

I have found out that the Audi 1.8t and the Passat 1.8t are longitudinally mounted, but I don't think the block is different at all. I'll have to find some pics of the mounting.

It may be possible to modify a 924 mount or fabricate new mounts to fit them to the side of the 1.8t block, and use the original 924 mounting locations. Another option would be to cut out VW body mounts from a donor car and weld them to the 924 body.
_________________
'81 931 in various states of assembly

[moone924]

Audi is replacing the 1.8T with a new 2.0T.... I looking forward to seeing the specs
_________________
Ryan Moone

Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time.