Increasing Horsepower?

[oliver28472]

Gear or Hydro? I remember my uncle bought a JD new, let's say 15 years ago. It was an ag tractor with a JD engine, not a CUT. The next size up had an engine that was identical in every respect except for the fuel pump setting. He had it turned up to match the bigger tractor and never had any problem with it. So I'm not saying it's a big no-no, just don't over-do it.

 

[Villengineer]

Diesels, in general, have less power when they are cold. Remember that diesels are compression fired, not spark fired. The diesel and air "light-off" better when they are warm. Diesels rely on outside temp, the temp of the block, and sometimes glow plugs to warm the mix enough to fire. That's also why diesels use block heaters. I know a lot of diesels won't even start if they are cold enough. Ask any first time diesel pick-up truck owner on real cold morning who didn't know better and didn't read the manual. Gas engines' ignition systems provide an ultra hot source of ignition to fire off the mix and therefore, if their spark is hot enough, they can take advantage of the denser mix.
Oh yeah, adding fuel does add power, not just increase rpm. There is a limit of course as the fuel air ratio gets out of whack.

 

[thegreatrandini]

Yes, u could change your fuel to air mixture and burn a little hotter adding hp without increasing RPM. I guess that is how turbo chargers work. I think they blow more air in allowing fuel to burn easier and hotter? I stilll think if you want more hp you should buy a bigger tractor!!!!!

 

[blackd]

Awwww come on Great, what's the fun in buying bigger when you can risk trashingg what U already own and still have fun doing it?

 

[thegreatrandini]

My brother in law the farmer told me when I bought my Yanmar that "farmin is fun........for about 15 minutes". He was right. I only make modifacations that help with the work. Over powering a machine won't help me. I run a 6ft tiller(very gingerly) with a 26 hp tractor. It is too big for my tractor. If I beefed up the hp it would be a disaster waiting to happen......Makes more sense to modify the tiller or trade for a smaller one.....I really need a bigger heavier tractor with more hp to get the most out of a tiller that big.........

 

[YanmarFever]

Randy
If you want a smaller tiller the one you have is fine.
Just remove some of the teeth from the sides and it will be smaller ! just make it what ever size you want (poor mans adjustable tiller) /forums/images/graemlins/grin.gif
Ernie

 

[YanmarFever]

I agree with Randy
If it was me I would trade up to a bigger tractor. Why take chances & blow the engine . The $$ spent trying to rebuild it would buy a bigger one on a trade in.
just my o2
Ernie

 

[thegreatrandini]

I have been told that before but I have not tried it yet.. So far I have only tilled the wife small garden.. Takes 5 minutes.
I plan to really try it out grinding her up an arena. I may remove a couple sets of blades then....

 

[jltrent]

I have a JD5210 which is factory 45 pto hp. I had the fuel pump recalubrated up 10% at a diesel shop and it dynoed 53 hp after. This did help the tractor a lot, but it still didn't make it a powerhouse. When you have the fuel flow upped 10% you usually get more than a 10% gain in hp. I have about 1200 hard hours on it since and other than smoking a little more I don't believe it hurt it any.

 

[ChuckT]

When I was in High School (way too many years back) a diesel mechanic told me that the cheap way to up hp was to fit a new set of sleeves & pistons and since the sleeves are made from seamless tubing any shop could make them up.

I suggested this on another forum & nearly got my head bit-off (for impertinence?)

If I had the time & need to do it that's where I'd start.

Oh, by the way, I'm talking about 0.040 over size here NOT 1/2".

cvt