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1986 900 SPG "Saabotage" for those who don't know the name.
The car is back together and I put about 50 miles on it today. Busy weekend so I had to finish it today, get back and tune on Sunday night, then head up to the Volvo track day on Monday the 28th. (http://www.scvcoa.org/page13.html).
What's new:
Transmission: this started as a beat up 1993 5-speed. I completely disassembled it and replaced most bearings. The differential was sent to Phantom Grip in Florida for their version of an LSD ($329). Most rotating parts (17 pieces total) were sent to Repair Technologies in Seattle, WA for shot peening (increases surface strength and fatigue life). All was assembled in the last 2 days and I put it in this morning.
Brakes: I disassembled and cleaned up some 1996 9000 Aero front calipers (but any '90+ 9000 will do...) and installed new seals. Then I modified and installed the early M3-spec Ferodo DS-3000 pads. I painted the calipers with 1500F engine paint (silver) and bolted them on. The backing plate had to be cut off about 1" above and below the caliper...I'm so glad I have a dremel.
Motor: The p/s pump was out of alignment because of my too-thick bracket for the Trionic crank sensor. It squealed frequently and burned up a belt! A washer was added to shim the pump back to almost-straight condition. Also a 90 degree elbow was added to the line for the oil pressure gage to avoid interference w/ the radiator return hose.
Suspension: I finally installed the PU bushings from Brad @ KC Saab. They fit all 8 pivots for the front double-A-arm suspension.
The Verdict:
No verdict today - wait for Monday!! So far so good. It fired up the first time and all I forgot were a couple heater hose clamps that were loose. The new trans has a #7 primary chain which overdrives the trans a little (I used to have #6) but the final drive is the 9:35 tooth, which basically cancels out the overdrive effect (compared to 9:33 tooth). So I didn't gain any road speed, but the torque that each gear sees should be less. This is a good thing since the motor is hungry for gear teeth.
The steering is (still) very precise and direct. I didn't push it because of the rain today. Likewise, the PG LSd is very transparent, so much so that I can't tell if it is working properly. But this is a good sign - when I add throttle in a corner, it pushes (understeers) pretty hard, which indicates that both wheels are hooking up well, instead of spinning the inside wheel.
These DS-3000's bite very well. Cold and they are smooth and easy with about 75% of OEM feel -- as in, they feel a little bit stiff. But when warm, watch the hell out. They BITE and do not require much pedal pressure to bring on very hard braking. I can't wait to get these on the track!
I will repost on Monday with the news, and hopefully will have some pics to post also. DS
posted by 12.81.12...
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