Hi guys i noticed that u all install software on your cars and not a piggy back chip. Why? I would think that by sticking a chip on( unichip), you wuld be able to tune it way better on a dyno and set it up for the exact conditions. My Viggen is out of warranty so it makes no difference if they can see the chip. Opinions please
Unichips have there niche and it's not saab, etc. I had one in another car, the guys from unichip came down and tuned it on a dyno at a price of about 15,000. That's what they paid to have the motor rebuilt after the car melted a piston and fucked a few others bits on a dyno. The best part was that I got a better engine out of the deal, but waited months for it. Plus I was smart enough and they were dumb enough to sign a form I had provided stating if anything goes wrong that they are responsable. They were so damn cocky about it that when the engine let loose, I was pissed/shocked, but to hear them talk among one another, call their bosses explaining what had just happened was priceless.
They switch to standalone for complete replacement of the stock system.
Piggybacks are the poor-mans half-assed attempt that makes them pay more later down the road when it causes damage and nets them little gains in HP/TQ along the way.
Do it it right up front: Get more HP/TQ and dependability too boot!
Sorry if i come off to harsh. I would just hate to see a Saab succumb to a ill informed decision.
Before this gets too far out of hand, I'd like to say that it would be cool if a piggy back could be made to work.
To the OP, get a copy of the Saab WIS (workshop information system) and start reading about how all the I/O parameters are checked and evaluated against one another. Plus look at the Ion Sensing functions.
By the time you could make it work, have everything faked/bypassed, you would probably be better off just ripping out everything and going stand alone.
Thanks for all the responses guys. I appreciate the feedback. Going to definately go the software route
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