1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Ray,
that means Saab Service Manual "2.7 TRIONIC Engine Management System M 1993, American edition". Also, T5Suite documentation was of some help, but the main source was that very manual.
As for the hardware - yep, it's mainly the crankshaft position sensor. The most popular T5 Trionic - version 5.5 - utilizes CPS of VR type and is designed to work with 60-2 aperture wheel. Version 5.2 - which was used only in 1993 model year for 9000 model - uses the same Hall-effect sensor on the oil pump housing as one off Jetronic 2.4.2 on B212 engine and works with 2+1 aperture wheel. The main issue with T5.5 is to design appropriate CPS scheme: many people went with aperture wheel off B234new/B204 crankshaft which they mounted onto theirs crankshaft pulley. But I don't like this design:
- it gives you an ability to fail with TDC mark (should you fail with calculations and bolt that wheel improperly)
- there's no room there between the pulley and the firewall even in the stock C900's and I don't think that adding the aperture wheel there is a good idea in terms of serviceability
The best way to go with T5.5 CPS wheel is DIY'ing some 60-2 aperture wheel/disc to bolt it onto the flywheel and some people even designed those wheels and built'em. And some other people have bought those wheel from the 1st people, but neither are sharing the drawings and measurements over the internet (LJ, *blink-blink*! C'mon, I know you're reading me! :)
The other parts to replace are:
- coolant temperature sensor (probably, you can stay with the stock one if you've got 2.4/2.4.2 Jetronic, but I'm not sure)
- intake air temperature sensor (and you'll have to design something where to bolt it into unless you moved to 9K intercooler and used 9K IC-to-intake manifold pipe)
- throttle position sensor (and thus - throttle housing; the housings are different for old 'click-type' CPS off pre-2.4 Jetronic and new VR type off 2.4+ and Trionic)
- depending on original Jetronic version you may need to replace AIC/IAC valve
- if you have old speedo gauge then you've got to work around it since Trionic needs (though not requires) the current speed value
I think that's it, although I could have missed something.
Pardon me being uncertain here, but I don't have much knowledge of LH Jetronic because of lacking of experience: Aeroflop used K-Jetronic and Valkyrie came with Lucas CU14.
And to be honest, I've got to say that I was slying saying there're no software difficulties. Yep, to make it just going - none. But to make 'a perfect fit' you'll have to mess with ignition maps. And know what? There are no stock ignition maps for B202 engines for Trionic. So you'll either have to use some maps off B204 engine (which features different design than B202: valve timing, piston geometry, compression ratio - this all affects ignition timing) or you'll have to spend hours on motor stands manually tuning your ignition maps or trust somebody claiming 'oh, I took to my indie and he did something there and now it runs perfect!!!11oneoneone' and flash that bin off that dude's ECU into yours. Or you'll have to wait until I'm done with DI/APC disassembling to extract (and interpolate, those maps have different dimensions) stock Saab ignition maps for B202 engines.
Well, that's in short how it goes there.
Cheers,
Zig
posted by 188.134.44...
, Fri, 13 Jul 2012 19:00:35
, Mon, 16 Jul 2012 17:27:29, Mon, 16 Jul 2012 17:29:26
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