<VV> Need Vacuum Advance Re: turbo Corvair fuel mileage

[FrankCB at aol.com]

Ray,
    Read Chapter 33 on Turbocharging in the Corvair  BASICS Manual 
(available from CORSA).  The last section on Modifications  discusses adding vacuum 
advance to the ignition system to improve both throttle  response AND fuel 
mileage.  The turbo Corvairs are the ONLY Corvairs that  do NOT have vacuum 
advance and they need it for driving under normal street,  highway and other 
unboosted conditions.  When I installed vacuum  advance in my 180, the 
mileage (driving back and forth to work every day)  improved by over 20%.
    Frank Burkhard
    Boonton, NJ
 
 
 
In a message dated 3/7/2013 1:37:43 A.M. Eastern Standard Time,  
corvairgrymm at gmail.com writes:

Hey  guys, just a quick question this time.

If a turbo Corvair is driven  very conservatively how bad is the fuel
mileage compared to a N/A  Corvair?  Separate answers for highway and local
are preferred.   I have a turbo Corsa I hope to have on the road by the end
of summer, but  more likely not till next year and I want to know how
impractical it is  going to be to put some miles on it.  I also intend to
buy a Spyder at  some point... but right now I have too many Corvairs as it
is.  A  couple more Corvairs cornered me and forced me to purchase them late
last  year so I'm at seven.  Two of them will be merged into one car,  and
two are intended for repair and resale but I'm getting attached to  them.
One needs too much to build but is too decent to junk  (excellent
floors/undercarriage)... that one will just be hanging around in  case I
ever get to it.

Just for reference I am accustomed to 21+mpg  on the highway with my hopped
up 140.  I do know how to drive  conservatively.. I think I'd fare alright
on the econo-run with the right  car =)

Thanks!

Ray  R.