Non-turbo injection pumps don't have boost compensation, so you get a choice...turn them up so you have all the fuel you can use under boost, and live with the smoke (and EGT's) from the excess fuel when off-boost, or adjust the IP for smoke and give up potential power under boost. That's the biggest hangup with turboing 3B's and 2H's, no boost compensation built into the governer on the pump...though AXT or somebody in OZ sold boost compensators for those IP's at one time.
Boost compensation is actually an aneroid (diaphragm and linkage) that *limits* max fuel when off boost, but backs off under boost pressure to allow max fuel (known as "full fuel" in IP lingo). Altitude compensation works similarly...limits full fuel when ambient air pressure goes down (like at altitude).
Steve
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Originally Posted by gifu
so... what about the IP? can a non-turbo IP deal with the increase in air?
what about the piston-skirt cooling, or whatever that is?
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