John Deere 3320

[Tritonman]

I came across a good deal on a 3320 with cab, etc and am just curious if there is a easy way to boost the HP on this tractor-by turning up the fuel pump/chip etc. I probably won't need to, just curious if it is possible or not. I think this is a little bit different motor than the other tractors in this series.

 

[Spudland_Dave]

Anything is possible...

 

[mfreund]

Many have asked and I have not seen any conclusive answer other than buy the HP you need to start with. Sorry...... I am open to correction........

 

[AKfish]

You can do anything... if you throw enough money at it!! From my hotrod days - once you modify one component - you place added stress on another component of the machine. Drivetrain, elevated exhaust temps, transmission, pistons, etc.

Like dominos.. and you start "chasing" 'em before they fall! 'Course you're runnin' with your checkbook!

Unless it's a passion and something that you're enjoying the challange of -- buy up front..

AKfish

 

[Spudland_Dave]

You can do anything... if you throw enough money at it!! From my hotrod days - once you modify one component - you place added stress on another component of the machine. Drivetrain, elevated exhaust temps, transmission, pistons, etc.

Like dominos.. and you start "chasing" 'em before they fall! 'Course you're runnin' with your checkbook!

Unless it's a passion and something that you're enjoying the challange of -- buy up front..

AKfish

I agree with the "buy right" the first time reccomendation, if you want the HP of a 3520, its way cheaper & easier to just buy the 3520 right off the bat. BUT, Because the 3320 is the identical twin (minus HP) to the 35/3720, you could safely go up to 3720-ish specs with no drivetrain problems.
The only way I'd "mod up" a 3320 is if I got it free from a family member and it had sentimental value or you already own it and just want a little more oomph......
Do your homework...see if the engine in the 3320 has a variation with more horse...then its real easy to get HP...Theres nothing I know in the Deere line with that engine in the higher HP...but check other Yanmar equipment...

But like AKFish said...by the time your done tinkering, etc... you'll have 2k into your project and that 2k would have gotten you into a 3520...

 

[Tritonman]

Does anyone know for sure? On some tractors its just a issue of turning up the fuel pump. On alot of farm tractors and some in our family we have just put a chip in them to boost the power, just like in the ford diesels, we have. The price is right on the tractor and I am buying it anyway. I will use it for a couple of years. It is a stop gap tractor on my way to a 4720. I have slowly traded up on tractors over the last 10 years starting with a 425 with a loader, traded to a 855, then to a 4400, and now to this 3320.

 

[deputy11]

The first thing I noticed when checking the specs on the 3320 vs the 3520 was that the 3520 has turbo. I went for the 3520. That may explain the increased HP.

 

[Tritonman]

I see that Gehl uses that same motor in a skid steer rated at 36.5 hp and the yanmar website lists it also.

 

[AKfish]

I see that Gehl uses that same motor in a skid steer rated at 36.5 hp and the yanmar website lists it also.

I've known a few farmer's who've tweaked the injection pump on their tractor's and it certainly increased the power output!! (This was WAY before computer controls!!)

Then they could pull that same disc harrow in a higher gear... or they could pull another bottom on the plow from the bigger tractor in the yard.

I also remember how that worked out for 'em over time...

Check the specs on the Gehl SS engine. Same compression, same injector pump, is it turboed, etc.? Same size valves, heavier duty rods?

Certainly, there are engines that nothing is different besides the pump flow.

Lengthy discussion on the 4000 series Deere machines here on TBN. With some added research - it is apparent that Deere has done more to the 4024T engine than simply changing the computer chip. Different injector pumps and different models of turbo's as well.

AKfish

 

[Spudland_Dave]

Well, the motors in our tractors arent computer controlled so we got that going for us.... "Turning The Screw" as its put will boost HP, but its not perfect HP if that makes any sense... Alot more to the pump then just fuel delivery...

What I would do is take the pump off, bring it to a pump shop and tell them to use the Gehl/Yanmar 37 horse pump specs.... But like AKFish said, make sure that all the components inside the engine are the same...if I were a bettin man, I'd say they were... This way you're not overdoing it and you know where you stand.

But once again, by the time your done doing it "right", you coulda just bought the correctly sized machine...resale on your "Super 3320" would be the same as a normal 3320 because how can you proove you got 37hp?

 

[stlbill]

Hi everyone:

I vote with the majority. There is no free horsepower. Any adjustment you make will have a consequence.

You mentioned your intent to resale the tractor. I am already less interested in buying it. I would be afraid the "consequence" hasn't happened... yet.

And I guarantee you I would look on TBN for ways to tell if a tractor had been user-modified contrary to manufacturer specification.

Just my $.02....

-Bill

 

[GRNTexan]

But once again, by the time your done doing it "right", you coulda just bought the correctly sized machine...resale on your "Super 3320" would be the same as a normal 3320 because how can you proove you got 37hp?

A Big GREEN Dyno................???????????????

 

[joes_427_vette]

It might be the same cubic inch engine but chances are that is where the likeness ends. Different components , beefed up block with extra webbing, forged parts, larger bearing surfaces just to name a few. Get the parts break down and you will be surprised. Turning up the pump is just the beginning.
My moto is live with what you can afford. Sounds like your a better broker than mechanic. If I were you I would stay out of that kitchen.

 

[RoyJackson]

It might be the same cubic inch engine but chances are that is where the likeness ends. Different components , beefed up block with extra webbing, forged parts, larger bearing surfaces just to name a few. Get the parts break down and you will be surprised. Turning up the pump is just the beginning.
My moto is live with what you can afford. Sounds like your a better broker than mechanic. If I were you I would stay out of that kitchen.

Easiest way to find out if it's the same engine is to look over the tractors' specs and see if it's the same Yanmar engine. The 3320 engine is the Yanmar 3TNV88, the 3520 is the Yanmar 3TNV84T. The 3320 engine has 100 cubic inch displacement naturally aspirated and the 3520's engine is 91.5 c.i.d. and turboed.
FYI, the 3520 and 3720 do use the same engine.

 

[mfreund]

Easiest way to find out if it's the same engine is to look over the tractors' specs and see if it's the same Yanmar engine. The 3320 engine is the Yanmar 3TNV88, the 3520 is the Yanmar 3TNV84T. The 3320 engine has 100 cubic inch displacement naturally aspirated and the 3520's engine is 91.5 c.i.d. and turboed.
FYI, the 3520 and 3720 do use the same engine.

Once again Roy has the answer. Turbo on the 3320!!!

 

[Tritonman]

I am picking up the tractor next week sometime. I can't wait to have the AC on when I am working my food plots. That will be awesome.

 

[Nuru]

Actually the motor in the 3320 is slightly larger than the the one in the 3520 and 3720.

 

[Spudland_Dave]

It might be the same cubic inch engine but chances are that is where the likeness ends. Different components , beefed up block with extra webbing, forged parts, larger bearing surfaces just to name a few. Get the parts break down and you will be surprised. Turning up the pump is just the beginning.
My moto is live with what you can afford. Sounds like your a better broker than mechanic. If I were you I would stay out of that kitchen.

You honestly think thats true? I got some news for you.... In todays industrial world economies of scale FAR outweigh the cost of materials... An example of what i'm trying to say: its way cheaper to cast ONE single type of block and then perform the necessary machine work to make different models... In this case they cast a single block for the entire 3TNV series... on a 3TNV88 they bore it out a little less then they do the 3TNV84. Even assuming all the engines were exactly the same, its cheaper to just derate them. Cat does exactly this on its OTR engines...you can buy a truck with a 350hp engine and if you want more, run on down to the Cat shop with a wallet full of cash and they can ReRate your engine to 425hp.....

The increased MSRP of higher HP tractors in a series dont necessilary mean it costs more to produce... Many times the actual production cost is exactly the same...

A Real world example of this is even evident on the configuration of these engines...we have 2 oil fill ports...Why....because its cheaper to buy these engines "off the shelf". Some of these engines end up in Komatsu mini ex's, some in marines applications, some in Generators and a few of them end up in 3x20 tractors

 

[CinderSchnauzer]

Right in the JD line:

JD 2720 with Yanmar 3TNV88 rated 31.4 HP @ 2500
JD 3320 with Yanmar 3TNV88 rated 32.8 HP @ 2600

 

[AKfish]

What Dave is saying and Cinder pointed out is "case in point" - but has been going on for DECADES! Not a recent development... Look at how many different models that JD has produced over the year's that have the same displacement; i.e. - same engine - different Hp.

That said -- there are differences -- and they are not easily determined by the uninitiated or those without extensive experience.

It takes time and money; and sometimes - expensive mistakes, before you get it right.

So, if your "gears turn and your motor runs" just thinking about how you're gonna get that extra 5 Hp -- turn the key!!

AKfish