Diesel Dart Cummins

Torkmnstr said

Oh now this is what I'm talking about, a 4bt will get us 500hp and still get 25 mpg!

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Can't tell you much about the 4bt, I think it would have to have the P pump like the 6bt above does. I know of 3 injection pumps that came on the 4b engines, only have experience with the P pump and the Stanadyne.