Hi my name is Luis. Currently in the process of acquiring an S5 91' NA. The current owner had told me that he had a engine rebuild about three years ago. And that the TPS sensor is bad. I've checked out the car recently and the body is in good shape, interior is decent (missing a drivers seat though) I'm not very knowledgeable about rotary engines so I'm hoping for help advice in the near future.
Also I've been looking for ways to get the best out of the NA engines. I've read that a new exhaust system can help add a few horses. Any advice for mods?