Quote:

It doesnt matter if its off by 120ft just as long as
its always off 120ft.... you use that one unit on your
car ONLY.....
Bill I cant say weather the VP is better or not...
I've always used the DA on my unit(its about 10 years
old now) but I've always been VERY HAPPY with it and
its predictions to what the car will run... mine is
within a few thousandths, which is closer than you
need to dial... if it says I should run a 9.009 I
put .01 on the window but if its a .005 I go with
.00... its that close and the car is also




My ten year old TAG consistently has predicted ET’s with in .003. I have run gas, alky and E-85, in three different cars and it made no difference. All I did was dump the data and start with a fresh data base when switching fuel and or cars. The key is you need a few good runs in the data base to accurately predict. Also like Cab said if you make any changes to the car dump the data and start over.