dunhamg
New member
I know it's been discuss in several threads previously, but has anyone been able to modify a 4120,4320 or 4520 for more horsepower after their warranty was up?
Thanks,
Grady
Thanks,
Grady
Has anyone successfully modified a 4120
- Thread starter dunhamg
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Spudland_Dave
Veteran Member
This has been discussed many many times, but I dont think anyone has actually ever gone out and done it.
From a purely technical standpoint, it wouldnt be hard to do.
From a purely technical standpoint, it wouldnt be hard to do.
JimmyDee
Member
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- 1990 - 253 Massey Fergerson, 2008 - 4520 John Deere
Just out of curosity and being a little nosey, what are you using you 4x20 series tractor for that requires more HP? Mowing or bush hogging maybe? My stock 4520 seems to have lots more power than traction as it is now.
Have a great day!
Have a great day!
Just out of curosity and being a little nosey, what are you using you 4x20 series tractor for that requires more HP? Mowing or bush hogging maybe? My stock 4520 seems to have lots more power than traction as it is now.
Have a great day!
Same here, also keep in mind possibly being in Uncle Sam's cross hairs if caught changing calibrations to the fuel delivery system. Not that it would happen, but all it would take is a high and mighty fuel shop doing some work for you to tattle. Seems like any more once some one tattles on a guy to the gov it is assumed as correct and is up to you to prove otherwise. My 2 cents!
Spudland_Dave
Veteran Member
Huh?
If that were true, there would be no farmers left in Northern Maine...they'd all be on death row for being "serial fuel system tamperers"....
joes_427_vette
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Good point. I haven't fought off the fuel injection police in a while. First offense is only 10 years, hard labor.
As long as one does not play with their fuel tax they are happy to see you use more.
As long as one does not play with their fuel tax they are happy to see you use more.
jbarker855
Silver Member
This is an interesting question. I have searched this board extensively looking to see if anyone has reported successfully increasing the hp of their 4 x 20 series. I have not found a single thread stating such. I guess part of the problem is that lots of guys can tinker with a diesel, but very few would have access to a dyno to prove their tinkering was a success. Now I guess someone could report a subjective improvement in power, but a before and after dyno pull would be very interesting.
CrownHawg
Silver Member
I think the reason there are no threads covering this issue is these little tractors already have MUCH more power than weight. I know my 4120 has plenty of power to get me in trouble QUICK. Also, with the cost of these machines, I for one would defiinitely not want to risk the possible damage to the turbo, injectors or even the hydraulics for a few more HP. If you "think" you may need more HP, look for a 4170 to START with. Never heard anyone complaining of too MUCH power. Just my .02 .
Cidertom
Gold Member
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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.
Gator6x4
Super Star Member
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.