Quote:
Originally Posted by bigbillyboy
If your IP is off of a turbo, it will absolutely have to have some sort of pressure line from the manifold to the IP that will add fuel as boost increases. If yours was missing, it'd be almost like running a NA engine.
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The aneroid fitted to the Isuzu 4BD1 type A pumps looks nothing like that. I know because my Isuzu 4BD1T has the aneroid. The fueling on the pumps without an aneroid is probably controlled on an RPM basis, there is no boost line involved.
If you add pressure to the back of that aircan, it will shut off most of the rack travel which will shut off most of your fuel and power.
I can provid pictures from inside the governors on my two injector pumps if anyone would like. One has an aneroid, the other doesn't.