hi all 
i was thinking about my ol 1958 977 20A loader , i havent worked on it for quite a while its big . but im thinking about jumping on it and getting it up and running again
all it needs is some clutch adjustment and some oil changed and a couple hot batterys 
 back when they went to the d333 engines they were turboed from the factory . i have a buddy that ownes a heavy truck junk yard i could source a turbo from
the 318s were around 120hp torque numbers i dont know , and the d333t was around 150hp , so my thoughts were to add a turbo to this engine in the future 
its a farm machine i just dont know if it would need any fuel adjustment or what not any info or input would be great from the ol hands 
good or bad im all ears lol 
thanks yall
Charlie  

Well your 20A is only rated at 95 hp. The 53A, 150 hp.
By my rack setting charts you would need to set up the D318 like a #14 78E/64C grader engine @ 140 hp. (turbocharged). Also required would be a different governor control group, governor spring and new rack setting. That's also pushing the limits of the D318 reliability wise. For an old occasional use farm machine I say you'd be better off leaving it as is and just maintain it as original.

the problem with turbo charging is it increases the stress on the engine this means things wear out quicker or even break. often when you turbo charge a engine you decrease the compression by a small amount first to de-stress the engine, one way this is done is by using head spacer shims and/or dished pistons instead of flat tops.

your best to leave it alone and if its a little sad rebuild it so it is back to factory spec and is then making full power.

if the machine isnt big enough for the task at hand get a bigger machine.

ok
thanks guys
i do believe i know what i should do on this loader .
the engine does run good
ill keep yall posted on the progress thanks all

i havent done any work on this machine yet its deer season in the south and im covered up at the moment . my plan is to get the clutch adjusted correctly as i can change the oil in the clutch housing clean the filter screen of any debris and fire this ol girl up . also i need to check the steering clutch oil , hmm on second thought ill check all the fluids