Has anyone successfully modified a 4120

[Cidertom]

4120,4320 have same turbo. 4520,4720 have larger turbo's. Electronic control for the fuel system is difficult to chip. The common rail injector system is more difficult to modify than the old pump style.

 

[dunhamg]

Anyone made this change yet? If so, send me a PM if you are worried about posting to the board and having people give a hard time for modifiying your own equipment.

 

[Gator6x4]

I don't think the government is going to chase anyone for modifying a tractor engine. I think you will find an answer to your question much quicker at a "Tractor Pull" board. You also may try visiting a tractor pull and see if any of the people will share information. The cost of such modification would in my opinion be cost prohibitive. The re-sale of the unit would be destroyed. It would be cheaper to trade for a 4720 than try and modify a 4120 to 4720 specs.