Fuel Maps

[Sean McManus]

My main question here is:
How does everyone out there tune the fuel (and ignition) maps on their 
system?

Ultimately, the engine should be put on a dyno and loaded in all sorts of 
conditions while the exhaust CO, HC, O2 and CO2 is monitored, as well as 
rpm, torque, manifold pressure, etc. Unfortunately, most of us don't 
have the funds for this type of testing.

The alternate method that seems most feasible is using an on board O2 sensor 
based A/F meter such as Haltech's or K&N's, tuning the system by driving 
the car and watching the meter at various conditions. 

1) Has anyone had any luck dialing in their system in this manner?
2) Can an O2 sensor based A/F meter be purchased or fabricated for less 
than the $150-$200 range that I've seen them going for so far?


Thanks in advance,

Sean McManus
University of Washington Formula SAE
Yamaha FZR 600 power, modified Haltech F3/Siemens fuel system