924Board.org

Cirno · Joined: 15 Jan 2010 Posts: 30 Location: NPR, FL

I found a 2.8L V6 for 500$ out of a 93 Audi 90 CS and I'm curious if anyone has experience with this engine? Is the bolt pattern the same as the 931 Bellhousing? As a more general question, when it comes to the fitment of a V6 does the brake booster need to be repositioned?

I have a neighbor who is willing to help me out with the engine swap. I may keep my turbo and hook it to the engine if I can get some confirmation from other sources that it can hold 6 psi in bare stock form with a tuning.

avaconirl · Joined: 25 Dec 2009 Posts: 48 Location: Ireland

Had a look at this engine thinking of the same thing.Don't think it will suit and it's one heavy engine. Have a look at the flywhell end of the engine and are there 2 12mm bolt hole s at the top approx 4 to 4 1/2 inches apart if so you have a chance it may work. I hope this will be of help and i have not sent you any false info.

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

If it bolts to an Audi 5-cylinder transmission, it can be made to work on the 924/924turbo bell housing.

There have been Audi 5-cylinder swaps done, but no V6 or V8 Audi swaps, so you might be the first!

Audiworld.com should be able to tell you what bolts together with what.

As for the brake booster, you'll need to measure and perhaps test fit the engine to get an idea of what needs to move around (if anything)

If you do need to ditch the booster, check out the Porsche Hybrids site to read up on brake booster solutions for V8 swaps.

Good luck, and let us know what you find/take pictures, etc.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Cirno · Joined: 15 Jan 2010 Posts: 30 Location: NPR, FL

Ok, did my homework and discovered a few things about this swap.

Like ava mentioned this engine is heavy. Iron block V6 with alu heads. Like ours only much bigger. The deal killer for me was the flywheel, like Ava mentioned. It's a "Dual Mass" flywheel, which is a funky lookin thingamabober with lots of springs. It's renowned for being crap. I'm not gonna get knee deep with a project in a project (inb4 "Yo dawg, so i herd you like projects..." ) to convert it to a 7a solid flywheel.

Since the engine wasn't out of the car I couldn't tell about the bellhousing pattern. : /

Don't think I'm gonna bite on this one. That dual mass flywheel just kills it.

Cirno · Joined: 15 Jan 2010 Posts: 30 Location: NPR, FL

http://tampa.craigslist.org/hil/pts/1640590587.html

Hrm, Choices Choices...

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

You might as well hold out for an Audi V8.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Cirno · Joined: 15 Jan 2010 Posts: 30 Location: NPR, FL

Well I don't want to open another thread in the engine swap forum so soon so i'll put this here.

I've found a 2.2L Ecotec for 100$
http://tampa.craigslist.org/psc/pts/1625273675.html

I know I'll have to fix the engine. He's throwing in the bearings too. I'll buy rod bearings separately and possibly a crank too if I must.

I'm really interested in it. It's all aluminum and from what I hear a incredibly well built engine. I'm kind of a nerd so those kinda details excite me. There is one detail i'm not so sure of as I've never done a engine swap before.

With regards to the bellhousing, once a adapter plate is made, what other modifications may need to happen to make it work? Do I need to use a chevy starter to spin the chevy flywheel? Will that require machining the bellhousing? Will I need to use spacers behind the flywheel to make up for the extra distance of the adapter plate?

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

931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

I'm interested in the 2.8L V6 swap considering I have one sitting in the Audi but then that is too many projects.

The engine weight is the biggest drawback.

Also it is only 172HP and not worth all the work considering the degradation on steering and upset the balance of the car (I have owned the 4cyl TwinSpark Alfa 164 and the V6 and there is a major problems with weight distribution on the V6)

If I was going for an Audi swap I would look at a 2.0L Turbo model at 200+ HP. They would be easier to find.
_________________
1980 Turbo
-too many cars and too many motobikes

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

Wait, you're comparing an Alfa V6/I4 in an Alfa chassis to an Audi V6/I4 in a Porsche chassis surmising that there is a correlation?

Seems like you're comparing an I4/V6 in a FWD vehicle to an I4/V6 in a RWD vehicle with a rear mounted transaxle and near 50/50 weight balance.

I agree that the power output of the Audi V6 is seemingly lacking on paper, but having driven a V6 powered Audi A4, the smooth torque and rev range is pretty impressive in that heavy, AWD wagon. In a lighter weight 924 body, powering the rear wheels it should be pretty fun to drive.

Given how common the V6 motors are, I would think they would be a pretty decent swap candidate for someone looking for a less-frenetic power plant for their cruiser with decent fuel economy (compared to many V8's) If you're looking for ultimate power, then a twin-turbo V6 or a turbo 4 would be better choices.

Now an Audi V8 would be even better compared to the V6, but they aren't as cheap or plentiful here in North America.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

v8carreragts · Joined: 05 Sep 2003 Posts: 665 Location: Tucson, AZ

There is also the 2.7 biturbo. My wife's A6 2.7 biturbo quatro is kind of fun to drive even though it is only 250HP. Although it would be a challange to package the intercoolers in a 924.