<VV> Turbo fuel consumption problemI'd map o

[djtcz at comcast.net]

original message 
Date: Wed, 13 Feb 2013 17:49:22 -0500 (GMT-05:00) 
From: Grant Young < gyoungwolf at earthlink.net > 
Subject: <VV> Turbo fuel consumption problem 

I have a friend who has asked what might be causing his turbocharged Corvair to be getting 
very poor fuel mileage. While the first thought might be a carburetor problem, it was been 
rebuilt recently and seems to work like it should - easy start, smooth idle, good acceleration 
and boost and no driveability or gas fumes (rich) issues. He says he usually drives it spiritedly, 
not wanting to get things carboned up, and is getting well under 10 mpg, sometimes only 4-5. Doesn't 
seem to have a leaking fuel pump either. Just checking to see if anyone has experienced similar 
issues or has recommendations on what to look for (other than Smokeys). 
Thanks, 
Grant 


============================== 
What mileage did he get before the carb rebuild? 
If good, what else was changed? 


Is the gas tank damp underneath? 
Is the vapor return line in pace, and in use? 
If idled for 10 minutes is a gasoline smell noticeable under or beside the car? 


I'd verify the TDC mark on the damper and map the centrifugal advance curve.