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1981 8v c900 sedan, 1990 2.0 9k carlsson, 1992 21 c900 sedan
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Is there any good information on this subject? This thread has been dead for awhile. Seems like the additional parts for the conversion are minimal. Sounds like it could be a fun weekend project...
Some of the part changes are quite major, but it shouldn't be too hard. I'm about to commence doing the mod on my 89 900i after the easter holidays are over and I can pick up a few things I don't currently have.

If you wanted to do the full engine swap version of the mod, that's quite a bit more complex in terms of how much needs to be done before the actually swappage can happen.

Craig.
 

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N/A to turbo conversion

If anyone still views this thread then the following encouragement offered.

I did this a few years back to a nice 1993 2.1 I had owned from new, as mentioned earlier the hard part is getting the parts, as you require all these hard pieces, brackets etc. as the vehicle is all pre-drilled to take these mounting pieces. Fitment is about 8 - 12 hours excluding the exhaust, this is why I say collect the lot, just envisage from the exhaust down-pipe to the intake filter box so every thing in between, that includes obviously the turbo and its ancillaries that attach e.g. cooling oil in and return pipes and fittings, be prepared to remove the plug in the block in way of the oil return pipe .... Plus oil cooler, filter mount and hoses or just fit an aftermarket cooler and make hoses as usually all these parts are ropey and no longer worth using.
Also consider the battery, you actually need the mounting base, heat shield, turbo exhaust manifold, and its support bracket.
However as the ezk does such a good job with knock and timing my experience was to leave all this as stock, forget all the APC business and fitted a low cost water/meths injection and run an 18 lb actuator, adjusted waste-gate to run 10 - 11 psi boost. This was undertaken about 5 years ago and the vehicle has been owned and run daily by a mature Saab specialist un-altered by him these past 3 years.

Yes I would do this again as post 92 2.1 lends itself well to this, plenty off boost grunt and better under moderate boost than say a stock low pressure set up used around that period.

I had more problems with knock etc when modifying an APC turbo vehicle at that time!
 

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ive helped do this in part with a T5 conversion using a 2.1 motor, it was a really fun 6psi!!


its not uncommon to run base boost when doing this conversion, it certanly gives the car some extra HP. 3-5 psi on an NA motor feels like alot!!
 

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Going to do a NA to turbo engine swap with a T5 in the near future:

1994 NA Vert lowered

Turbo engine and trans
Eeuro Lightened Flywheel and Trigger housing
CPS from 94 9000 (tbd)
Other sensors TBD
C900 Oil cooler and lines
C900 Oil Cooler housing
94 9000 harness
ECU from spares
Red DI
Heavier Duty Clutch
Flywheel bolts from Fastenel
Various gaskets to refresh trans while its out
Newer hoses and belts
Water Pump
New VR while engine is out

Have aftermarket Intercooler, need pipes and air chamber
Need Turbo downpipe, possible exhaust (need to pass emissions for 5 more years)
 

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I love when this thread gets a bump. I may have a turbo downpipe you can have. Let me look through my stash.
 
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