Cat 977e 20a D318 engine

For more hp, you need more fuel, so if you wanted the D318 to match the output of the D333, you'd need to increase the fuel rate. Whether you could get there or not depends on whether you can increase the rate sufficiently and whether you can get sufficient air into it to consume the fuel. I don't know if D318 injection pumps can be "turned" up. Eddie will know, and I think Bruce P also has some experience at this.

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