1995 90 quattro V6 to 1.8t Conversion

[Ruffiano]

Got the intercooler mounts mocked up, should work well:


Plenty of room


behind S2 bumper:




Actual bumper going on the car:

[Ruffiano]

Another piece to the puzzle

[Ironman80]

I think the one that you have labelled with the red "X" is an alignment dowel and was never intended to have a bolt through it. If you have other bolts that line up and the dowel does not line up because of the engine/trans swap, then the solution is to remove/cut-off the alignment dowel. This is common for swaps of 2.7tt 01E 6 spds into C4 UrS4/S6s.

Thank you!

[Ruffiano]

Got the downpipe mocked up, and a friend is doing the final welding on it



Same friend sold me an ABY Airbox which is a perfect fit. I adapted the smaller 1.8t MAF to fit the inlet and everything ties in very nicely:

[macspring]

I struggle to understand wiring diagrams!

How easy is it to swap a 6A/ACE 16v for a 1.8T engine in a coupe?

No help I know, but easier to buy an S2 Coupe ?

[macspring]

Ruffiano,

Stupid question, but why didn't you pick up a usS4/6 instead, as it is ready made, rather than going this route with the 90 ?

Just me being curious.

Good work by the way.

[Ruffiano]

Ruffiano,

Stupid question, but why didn't you pick up a usS4/6 instead, as it is ready made, rather than going this route with the 90 ?

Just me being curious.

Good work by the way.

I actually have a URS6 avant:


But the s6 doesn't have a 1.8t either.

The truth is, i like the feel of the small chassis better than the large chassis. I also like the b4 styling better. It all really comes down to preference. I have owned several UR4/6s and I've owned several b3s, and cqs. I converted my CQ to S2 spec (and then went with a big turbo), and i just enjoy the smaller chassis more. I don't really know how to describe it. I want this car to have around 300 awhp and all wheel tq when i'm done with it. I want it to be a comfortable cruiser, but also have a bit of grunt.

[Thuppu]

Same friend sold me an ABY Airbox which is a perfect fit. I adapted the smaller 1.8t MAF to fit the inlet and everything ties in very nicely:

Really looks like a OEM fitment.

Like your UrS, what color is that, or is it dipped?

[Ruffiano]

Really looks like a OEM fitment.

Like your UrS, what color is that, or is it dipped?

Thanks, It is dipped, anthracite grey. I had prepped the car and wetsanded it in preparation for actual paint, but my paint guy lost his shop and i needed to protect it for the winter, so i choose to use plastidip

[macspring]

I actually have a URS6 avant:

But the s6 doesn't have a 1.8t either.

The truth is, i like the feel of the small chassis better than the large chassis. I also like the B4 styling better. It all really comes down to preference. I have owned several UR4/6s and I've owned several B3s, and cqs. I converted my CQ to S2 spec (and then went with a big turbo), and i just enjoy the smaller chassis more. I don't really know how to describe it. I want this car to have around 300 awhp and all wheel tq when i'm done with it. I want it to be a comfortable cruiser, but also have a bit of grunt.

Thanks for reply, I know what you mean as I have both cars, B4 and C4. The C4 is more refined and more of a luxury drive, with the B4 being a bit less refined in the feel, weight, optional extras. Tend to drive the C4 slower. Must be getting older as I'm liking the C4 more now.

[Ruffiano]

Getting close.

[Bowie69]

That looks excellent!

What's left to do?

[Ruffiano]

That looks excellent!

What's left to do?

just reassembly, and finishing touches! Sadly I don't have a lot of time in my life to do all this, full time job, plus wife, plus young kid means my time is very limited!

[Ruffiano]

Big thanks to Nate (araipilot)! got the downpipe done and installed:


Got some of the final wiring done, hooked up an OBD2 port and kept the OBD1 ports just for kicks, hopefully this is the last time I had to pull the Fusebox:


Made an extention for the A/C Speed sensor (trying to keep A/C in this beast):


Plastidipped some badges, black on white looks good:



Hooked up a boost gauge, cut out the vent to make it work, need to run a switched dimmable power line to it so it will illuminate, it already has a red bulb inside: (also have a nice solid 20hg of vacuum while running)


Trying to figure out if i can run an early style knee parcel shelf to have a nice spot for the ECU.

[Ruffiano]

I was able to take it for a drive this weekend, everything seems to be in order. pulls nicely. Needs to have the exhaust attached. I also have a small brake issue which existed prior to the swap. the booster doesnt seem to hold pressure, i have to pump it a few times before the brakes want to work... not a good thing, I'm guessing it is the booster at this point since i put in a new check valve at the time of the swap.