MPG Re: <VV> Don't buy gas on May 19th, 2004

[FrankCB@aol.com]

Rich,
    Well, if you ran the stock 180 YH at significant elevations it ran rich 
since the carb jetting can't take into account the "thinner" (less dense than 
at sea level) air.  This could be one reason for your low mileage on the trip 
home.  My distributor timing was set up for the stock 24 degrees BTDC (at idle) 
WITHOUT taking into account any effect of vacuum advance.  So the vacuum 
advance ADDS to the 24 degrees when it comes into play at speeds above idle.  With 
high octane gas and only 8:1 compression, the 180 handled that much advance 
just fine.  I used an electronic knock sensor to electronically retard the 
stock timing when it "heard" pinging/knocking.  I'd suggest you check to see just 
what timing you have under low to moderate throttle settings.
    Regards,
    Frank Burkhard  

In a message dated 5/15/04 3:35:35 PM Eastern Daylight Time, SPYDER62 writes:
Hi Frank
 Yes, I installed a Dale vacuum advance dist. before I even drove the car for 
the first time. Did it in Mark's (Southwest Corvair) driveway. Mileage was 
right at 15 the whole 2000 + miles from Mark's shop in Phoenix to my place in 
Oregon.(did some site seeing on way back) Been playing with timing and carb 
adjustment since I've been home and this last tank looks like it will be around 18 
or so looking at were the gage is. As for brakes, what are they for :) the 
right petal is all I know how to use :). Do need to see what jets are in the 
carb now that it is at sea level.
Rich