Can a turbo be added to a non turbo engine??

[luvrbus]

The N70 with the right setting was a true 318 hp not the 304 hp it was a fire truck setup, but there you go one has to have the right cams,blower and liner port height or they smoke like a train 

[HB of CJ]

We had N90 injectors in our old fire apparatus.  "N" pistons, no turbo. Governed speed was about 2500.  The master mechanic told us not to run over 2100 continuously.  We also had to learn to keep our foot out of it until the engine spun up.  Otherwise the black smoke was simply incredible. 

Starting as early as around 1974 the shops began replacing the big injectors with I believe N65s.  Smog laws already in California.  Do not remember about any throttle delay stuff yet.  I helped do it as I thought it was fun.  Hardly any mufflers.  Long ago and far away.  HB of CJ (old coot)