Out of curiosity, how roughly do you drive to get such spectacular figures? I'm aware you can save gas if you drive 55mph instead of 77mph but some of us with impossible schedules and long commutes aren't able to do that. Pulse and glide gives huge savings but isn't possible during close traffic either. (i'm not sure if your doing either/didn't check linked articles, just read this thread)
I'm asking because i'm considering something very similar - put a VW diesel (though thinking of an IDI for other reasons, with a factory or DIY aftermarket turbo) into an SL or SW, do some minor aeromods (not sure if i'm up to driving a space cadet car with boattails or drawing attention yet though but more subtle things and bellypans are fine, though if I went from 70mpg to 90mpg my wallet would probably make me accept it) but mostly still drive it like i'm forced to drive it ie as fast as possible without getting arrested in close traffic because there's never enough time to do it all. Any suggestion what mileage I might get if I did the same but were forced to drive like a typical american? (I get about 33-35mpg on the urban freeway commute in my "40mpg" SL0)
I'm researching car projects for a future education and work situation coming up in about 18 months which will force probably a 20-30k miles/year commuting scenario absolute minimum (possibly bad as 40k) for the next decade, such that amortizing the cost of a long lived diesel plus custom conversion costs over that means if it saves me $25/month in fuel it pays for itself by then. I have a Saturn SL and still like it, cheap to fix, already familiar with it, it's few flaws (like warping brake rotors) known by now, little rust problem due to plastic body and similar. If the additional mileage benefits could be had by putting the engine into an SL instead of staying in the Jetta, i'm going "hmmm..." (though i'm still baffled why it should be so much better, the Jetta is a bit heavier but pretty comparable aerodynamically to an SL sedan, and better than a wagon)
Have you tested a 0-60 with the car just for a rule of thumb of performance? With that Rocketchip it should be, what, 120hp comparable to the original DOHC motor just with more torque?
