4520 Horsepower boost???

[JD4520]

I just bought a 4520. I understand that all the 4000 twenty series tractors have the same engine. I'm guessing the difference in horsepower is accomplished with different injectors/intake etc.

Is it realistically possible to make my 53 HP 4520 perform as a 58 HP 4720? If so, How?

 

[RRacing]

Its done by the injector height shimming from what I went threw. It allows more fuel to be burned and increases exahust to the turbo and makes more boost. from what I was told JD uses this engine in the skid steers to almost 80 HP /forums/images/graemlins/wink.gif

Jim