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Old 12-27-2007, 02:32 PM   #10 (permalink)
'07 Saab 9-3 Sedan 2.0T S
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Check out this link

This is a paper from 1992 on the VX

I was wrong, the CD of the VX was 0.31. So aeromoding would do a lot of good, huh?

I was also wrong on the highway fuel economy. The VX was good for 55 mpg!

According to this paper, the VW had a weight reduction of 80 lbs., which was good for a 2.5% improvement in fuel economy. Going from 0.32 to 0.31 on the CD was good for 1.5%.

I think that you could get a pretty significant weight reduction with the carbon fiber, etc.. 100 lbs. would be easy. 200 lbs. might be possible. Would that be good for a 6.25% improvement in FE?

Could you get down to 0.25 on the CD by lowering it, an air dam, mirror delete, and a spoiler? Would that be good for another 7.5% improvement?

Engine mods maybe get you another couple of %. Let's say 2%.

That's a roughly 15% improvement. You'd need a 81% improvement.

Can that gulf be bridged by the electronics mods (start-stop, engine cut off on decel, alternator cut off on accel)? And driving techniques? And tuning?

Running E85 in a non-flex fuel '07 Saab 9-3 2.0T
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