Ways to increase boost on 4120, 4320, etc?

[tillboy2001]

</font><font color="blue" class="small">( OK, here's what I observed. No wastegate. Model # S1B S031 I may have a 1/I or S/5 error as it was cold and windy. This turbo was on a 4520 so let's see what model # the 4120 has... )</font>

Ok, here's the 4120 turbo info:

Borg Warner
Part Number: RE?23754 (? is because I can't see the number clearly - it has a rivet thru it)
Model NUmber: S1B S031

So I'm assuming the whole 20 series line has the same MODEL number turbo...but what about the actual PART number? And if it's the exact same turbo, where's the extra power coming from? Is Gale Banks making a tuner for this beast or what? LOL

I don't need anymore power though. It runs great tuned as a 4120 and for the mowing, rotary cutting, tree dragging and loader work I do, it's got more than enough power!

 

[tillboy2001]

And here's a link to the 66HP version of the 4024T engine found in the 4x20 series tractors: (PDF file) Specs

This version is found in generators and skid steers I think. So this engine is easily capable of putting out even more than the 4720 tractor which is only 58HP. I wonder how they've tuning it to get the extra power?

 

[GeorgeC]

<font color="blue"> Anybody know if there is a way to tweak the HP of the 4120 or 4320? Seems that since the engines in that line are all identical in size, weight, etc Deere must have added more boost to get the power. I used a tuner on my F250 6.0 Diesel to add power, so I wasn't sure if there are any inexpensive tricks to adjust the boost on these tractors?

Thanks! </font>





The way to increase boost is simple, although not simple to do without modifications to the fuel pump.
To increase boost, more mass must enter the turbocharger. Mass, being fuel. Increases of fuel pulse will send more material through the turbo, and increase boost.

Fuel is power. Just adding more forced air into the same amount of fuel charge will not make power.
More fuel makes more boost which makes more horses.

 

[NUTNDUN]

I too would love to find out the exact parts and if what knowledge I have on diesels serves me correctly it should just be an injector swap and turbo, along with the exhaust manifold. I doubt if any timing or anything with the pump is changed since when the engine is working it is already under full throttle so to speak and turbo lag would basically be non-existent, unlike my pete where you are using your right foot vall the time then timing is key when it comes to making the power sooner. I know I could be wrong and if I am just smack me around like a big fish...LOL