Injection Altitude Compensation (Carb)

[naderson]

Hello guys..

i have some other question about the carbs...
and i would really appreciate ur help (esp. u curtis)
i want to know all about the Injection Altitude Compensation in the Carb.
how does it work?
what does it do?
how does it help?
what do i need to know about it?
and i would be really glad if you lead me to some illustrations or such..

thanks in advance..

[UncleBob]

keep in mind there are a lot of different setups on feedback carbs. The more common method was to use a metering rod that metered an air passage to the main jet circuit. In other words, the same amount of fuel was flowing regardless, the metering only metered the amount of air that was allowed into the emulsion tubes, aka, glorified vacuum leak.

Some used a fancy fast cycling solenoid to change the dwell (percentage) of the fuel ingestion also. Not many did it this way though.

Some used a seperate "system" for the altitude and O2 feed back, and some rolled it into the same system.