
It was a very hot week until yesterday so a lot of work was done with the garage door shut and the air conditioning on. I don't think I am going to be happy about the electric bill, but the car has to progress. In the last month I have focused on wiring issues and the last several days exclusively on the serpentine belt drive system.
I am proud to say that represents the last of the major mechanical fabrications. It was a real challenge to say the least. Many parts were required that had to be designed, cut, drilled, welded and machined.

Some time ago I modified the original
engine pulley and installed a
taper lock hub for attaching it to the motor. It is cast iron and presented some real issues. It will need to be replaced as soon as I can find an aluminum billet pulley that can be machined out the same way. The center unit can be removed and reused in the new pulley. This will save horsepower. My pulley and torque converter still weigh less than a conventional flywheel like most
EVs use. For now it has served in setting up the system which runs very well and quietly. There is not a good excuse for wasting power. Especially in an EV!
There were a lot of parts and brackets needed. I drew them and cut them out as cardboard templates. I then used a steel chop saw and grinder to cut them the rest of the way out. Arc welding was used frequently in the process. I use 3 different kinds of welders on the project.
Getting everything aligned was a big task. Also designing each piece had to take into consideration the stress forces in each direction working against them. I had originally planned to reuse the Saab belt tensioner but there wasn't room for it to fit so I designed a robust manually adjustable tensioner using the Saab pulley.
In the end there were several pieces but they worked as planned and the power steering and air conditioner are now reconnected. The steering passed a test with a single battery spinning up the motor today and after about a quart of fluid turns the wheels now with the greatest of ease! I will test the air conditioner tomorrow by hot wiring the clutch and see if all the pressures are up and it blows cold air. It doesn't appear to have leaked during the conversion process.
Earlier in the month I connected a lot more wiring and traced down a lot of other circuits that will be needed. The starting circuit now works with the key and is tied into the motor controller integrator box. The throttle and many other wires are also connected. I still have several instrumentation issues to resolve.
It turns out after my last post that I may be worried for nothing about the speedometer not working. I expected it to register with my wheel spin test but it is run off the right rear wheel via the ABS sensor. The wiring is complex with several computers that have to remain in the car for the brake system, transmission, air bag & other systems to work correctly. I believe I am understanding what is going on but it will take some time to trace it all down and re-integrate it back into the process. The most difficult of all is the ECM (engine control module). I got lucky and found all the information I will need on the signal data and control lines. It is a Bosch Motronic 2.8.1 used on other vehicles than Saabs! It will take some time.
In theory I could put batteries in the car at this time and drive it down the road. Some things won't work right yet, but it now has brakes, steering and essential safety equipment all working. I don't have the charger but am told Belktronix will have it done in a couple of weeks for me.
I bought a complete Kenwood/Sirius stereo Rig off Ebay for a super low price 2 weeks ago. It is a single din type that will free up some space in the dash for instruments that are needed. I hooked it up the other day and it is already subscribed to my amazement. It plays MP3s, CDs and is really a great looking unit. Lots of choices in music! I will have some pics of it up by next post.
I am getting closer all the time but also anxious.

Left: Power steering and Air Conditioner

Right: Maze of additional wiring now in place.