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Those two suppliers have good reputations woth ECU mods. Note that ECUs are staged at different mod levels. The restrictions of the intake and exhaust are also critical and are needed to support different levels of boost from the ECU. There are other mods that you could/should do at a DIY level. The turbo compressor discharge silencer needs to be removed from withing the hard pipe, or a Viggen IC* installed which eliminates that section of pipe all together. 3' duct mod and TBTC rework. The Saab Sports exhaust is a DIY install as well.
* You will need to replace with the newer style lower rad hose. And the new turbo disharge hose that you need to buy will need to have about 1/2" or maybe more cut off at the turbo end so that it interferes less with the AC pipe. Nice to know that in advance. The Viggen IC really makes a big difference. I do not like the idea of slapping on an ECU mod and ignoring the basics.
A MBC+A will get 15 PSI of boost and very strong performance in the lower gears. But 1st gear will overpower the tires. That is quite cheap. With an ECU mod you would be better off with a MBC installed as a SMBC to not overpower the tires. The SMBC will provide some turbo spoolup improvement that an ECU mod alone cannot do. A SMBC is quite in-expensive.
You can go a long way without any problems with the clutch or anything else.
Suspension: I would start with a SAS type sway bar, then Koni shocks and new upper mounts up front, then steering rack clamp if the rack is steel, then 6 point subframe brace, then poly control arm bushings(3 per side**), then steering rack clamp if an aluminum rack, then finally poly front sway bar bushings... in that order as far as inclination and wallet will take you. A few have replace the rear axle bushings (there are only two).
** Nick at GenuineSaab.com has an improved bushing*** to connect the two control arms. Brad at KCsaab.com has the other poly bushings, and for the sway bar too. But note that the sway bar bushing is not easy to replace, the subframe needs to be lowered to get at it. I don't know if there is another way such as removing the rad... don't have a NG900 anylonger to look at. Brad also has the rear axle bushings. Control arm bushings are not a DIY for most. A shop press is needed and its a tough job then. Can't recall how difficult the rear axle bushings are - ask Brad.
*** also has rack clamp for the steel steering rack. MPperformance.com has clamps for both types of steering racks. And both sources have the brace bar to go with the clamps. Nick also has the 6 point SF brace.
If you really get carried away, you can do a large downpipe and cat.
posted by 68.93.19...
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