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Gary-
Good question I've never really considered, but I'd have to guess some of the reasons are:
cost added to engine package
added complexity to engine
lack of effeciency in NA motors vs. forced induction
I'm thinking about the induction temperature differences between a NA car @ 20F-110F max range vs. the turbo car working with exhaust which could be several hundred degrees F.
maybe other reasons too.
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Jeff Wilson
1989 911 Cabriolet
Grand Prix White/Black
33k
Stock except:
Turbo 7x9 Fuchs
SOLD!
2002 986S
Seal Gray/Black
Painted Center Console
18" Turbo Twists with rear spacers
Tequipment aluminum shift knob
Colored center caps
De-ambered tail lights/side markers
Stock except:
B&B catback exhaust
http://i29.tinypic.com/i6crck.jpg
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