[diesel_john]

WHOOPS,
On my mechanical injected diesel i mounted a throttle position sensor near the pump linkage and attached, so that under like conditions, i can compare A vs. B vs. A mods. Just by reading the ohms across the TPS. would apply to carbureted engines, to compliment vacuum.

On pre ODB injected engines, you can also compare % load if you have an accurate dwell meter. JUst hook to an injector to get the percentage of time the injector is open. Under given conditions, same gear, speed, road, day, etc. you can compare A vs. B mods. for example windows up vs. windows down.