The Project Pad

Couple build related questions as I work on my '85. Inspired by your progress...
Where did you bring the 3B harness through, driver's side or passenger? I'm using a 200q20v harness but pulling out excess. I am also going to vacuum brakes and it looks like there is room on the driver's side for the harness.
Related: where did you put the ECU? I'm thinking of the storage pocket on driver's side kick panel.
Are you running spacers with the urs4 fuchs?
What front brake setup? I'm considering rs2 adapters, boxster calipers.

Thanks, Chris

I'll see if I can help Chris. On my 84 I brought the 3B harness through on the passenger side, I drilled a new 2in(I'll check if you need an exact measurements) hole on the flat section under the coil mount. I removed the WX harness and put a grommet there. Right now my ECU is laying along the passenger A pillar, but I will eventually put it up on the side of the glovebox in the stock WX ECU location. I kept my AC so it is pretty tight with the harness on the passenger firewall. I routed the harness to the drivers side up under the dash and got it to fit in the cable tray above the steering column. I went for a total factory like install, so I did surgery to the brown harness (removed old WX wires no longer needed) on the drivers side and integrated all the 3B and brown harness wires to the factory fusebox connectors.

I also went to to vacuum brakes, installed the Lewis/034 clutch MC brace and put a bias valve under the brake MC. I found it pretty tight by the booster, especially routing the fuel lines between the IM, the brake booster and the p/s lines to the hydraulic reservoir. It was a pain getting it all to fit.

Dave

John, Nice pic in Quattro Quarterly!

I hear what you are saying about 15-23 psi. I have found the same thing, unfortunately I think these turbos/motors really hit their stride at 26-28 psi. So it looks like you have a new goal

Jim, how much boost are you running on just 93 pump gas? Right now my tune isn't good enough to safely do much more without getting on a dyno or at the very least getting you or Hank or someone else in the passenger seat to push buttons. I could do a bit more data logging and get it closer I suppose, but 23psi is pretty fast right now. I may do an E85 of say like 30% and work my way up to the high 20s eventually. Right now I have enough of a to do list to keep me busy.

Couple build related questions as I work on my '85. Inspired by your progress...
Where did you bring the 3B harness through, driver's side or passenger? I'm using a 200q20v harness but pulling out excess. I am also going to vacuum brakes and it looks like there is room on the driver's side for the harness.

Chris, I think Dave summed it up pretty good except that in my case I am running an 034 IIc cpu with a whole new harness. I pulled the CIS harness back into the cab beneath the glove box and cut everything out except for the switched hot wire coming from the drivers side. This used to power up the OEM ecu, but I used it to trigger a relay feeding a switched terminal strip. I was going to put the IIc behind the glove box with just the USB cable run into the glove box for access, but with keeping the A/C there wasn't enough room before hitting the evaporator coil. I opted to install the IIc in the glove box itself. It's not the ideal place, but is convenient and harness wires would reach from there.

I also pulled most everything that wasn't needed from the drivers side harness and removed them from the fuse/relay box. I kept anything that I figured I might need, but just bundled it up and ran it into the air blower space to deal with later. Going through those wires is on my to do list as I get things like wiper squirters, levels, and such straightened out.

I've been very pleased with the vacume setup for brakes. It's still tight, but doable and less headache and fluids to leak. I worried about having enough vacume, but after driving fairly spirited for a good length of time I no longer worry about it. They do just fine.

Are you running spacers with the urs4 fuchs?

The Fuchs are being run as is....no spacer and that is with 225/45/16. They are close to the steering arms, but dont rub. Sometimes I look at pictures and feel like they should fill out the wells a bit more, but I am lowered quite a bit and have no rubbing issues at all. I haven't even rolled fenders.

What front brake setup? I'm considering rs2 adapters, boxster calipers.

As far as brakes go, I am running G60s in the front and have the slotted rotors and setup from the v8/S4/S6. They do pretty good, but as I keep bumping up boost I'm starting to think more brakes. I have a set of A8 rotors and TT/A4 calipers that I will probably install shortly. Although they won't be the best, I think they will be better than the G60s. The worse part of going that way is the A8 rotors weigh a ton, but should be able to soak up some heat. The best part is they will fit under 16s.

Thanks, all very helpful. I'm removing any 20v wiring that isn't needed from the engine compartment and consolidating where possible. Not running A/C now, but keeping all plumbing in place, so will have same space constraints. I'll have to go through the project build again to see where you cut the firewall.
I have two sets of the 16" fuchs, but also want to keep the option to run the 15" ronals, so that why looking at the boxster brakes. Putting in the vented rear rotors from an urS6 with 200q20v rear calipers and carriers. Still need to source the rotors for the front.