2020 KAIZEN work, YTD....
Realizing that I had done several "continuous improvement" upgrades this year that weren't documented, I thought I'd remedy that and get those changes on the record.
I've driven the car to work for probably 6 months of this year, sharing DD duty with my trusty Ford van. One of the issues which has troubled the car each summer was keeping the AC compressor belt tight. I have always used the original 92 version of the accessory mount, the one that uses rubber bushes to isolate the AC compressor. Sadly, it never seems to keep the belt nicely adjusted as these mounts "creep" with the belt load (and probably the reaction loads from the compressor cycling). I've tried the FCP Scamtech replacements, the IPD blue poly bushes, but nothing seemed to avoid this creep and it always ends up with the AC compressor belt loose and jumping/slipping.
In a related story, My son's GF bought a 92 940 NA sedan. Among other stage zero work we did to get that sedan reliable, we installed a Denso 100A alternator and a 94 accessory mount which does NOT use the rubber bushes to isolate the compressor. I had been wrongly told years ago that the early compressor won't align properly with this later mount (93-98 I understand), but my son fitted it together and proved it worked well. That was enough proof for me..... so he bought a replacement 94 mount for the one he used from my stash, and I set about to installing it. Here is the 94 ALT and AC mount, just as it arrived from 2ManyTurbos:
Note that the bottom mount is solid metal, with no elastomeric bushes to creep and move. I found all of the adjustment brackets which mount to the casting (not all shown in the above pic), and then installed. It was tricky with my non OE coolside charge pipe from do88, and required a custom belt length for the AC compressor (I think it was 1012 long) but it assembled and aligned perfectly for the AC. The only hitch was my large 100A BOSCH alternator was pushed out further and collided with the intake pipe. Since I had another 100A Denso on the hoard shelf, I installed it and the fitment issues were gone. Here is how the assembly looks with all belts taunt and centered (I confirmed off the harmonic balancer face with a framing square, and both the AC and ALT V-belt pulleys were aligned.
Both drive accessories work well, and the AC belt adjustment is rock solid. I strongly recommend all 7/9 series folks to toss their original bushed mounts and upgrade to this latest version which works very well.
This past summer, I was pulling out of work and realized I had hit this milestone on my 94 speedo cluster, which matches the age of my 94 squirter engine and AW71. This drivetrain is barely broken in!
So the final improvement was engine management. I'd noticed that at part throttle/boost, I was typically seeing near stoich..... no enrichment. There was a thread in Performance at that same time, and several TBers were discussing the same issue. My TLAO chips were bought second hand, and I'd guess they were for a stock AMM and perhaps injectors. My engine had moved past that, but the chips didn't. As a result of that thread, I reached out to the man himself (Mike), and soon I had a custom chip ready for installation into my 984 ECU. Would this chip solve my fueling concerns?
Success! The new chip which was custom matched to my injectors, 3" AMM, works great. I get some enrichment at low boost, and still sitting at ~12.0 at 16psi. It is great to have this concern behind me, and know the squirter engine has protection against lean damage in partial fueling conditions.