Increasing Horsepower

[brickMan]

My NH TC35d 2000 was a great used deal. But I'm down about 3 pto hp for some of the work. No one has mentioned these shiabura engines (NH, CASE).
Any ideas about fiddling with them to get some of the same small mods?

 

[Soundguy]

Why do you think you are down about 3hp?

Soundguy

 

[brickMan]

My NH TC35d 2000 was a great used deal. But I'm down about 3 pto hp for some of the work. No one has mentioned these shiabura engines (NH, CASE).
Any ideas about fiddling with them to get some of the same small mods?

Did some research in my shop manuals.

It appears that Injection Pump timing is a straight-forward, if very involved, process. The overview specs show 18 degrees as timing set, but the fuel section shows a range of 17-19. If my current is at 17 and I increase it to 19 I get an 11% increase in flow-time; they call this "spill-timing". Not sure this would be noticeable.

The TC45D ( a 4 cyl) has the same timing and the same tomato can specs (cyl). The TC40D has 4 cyl has a shorter stroke, but longer timing; up to 21 degrees; with the low at the same as my high; 19 degrees.

So. All compression ratios are the same. [These are diesels]. QUESTION: If the smaller cylinder can handle more fuel...does this mean if I add spill timing breadth to my larger cylinder I get a less clean burn, and thereby no effective power improvements?

Or do I have the whole thing backwards??

 

[brickMan]

Why do you think you are down about 3hp?

Soundguy

I can't bushog low with a 6 foot. I can bushhog high with a 5 foot. But I bog down even at slow speeds on a mild incline. The specs show me at 27.7 due to HST; and my understanding is that 30 would be a reasonable output for the 6 ft bushog

 

[Soundguy]

If it's a no-go at 27.. I don't think 30 is gonna pass with flying colors... JMHO

Soundguy

 

[brickMan]

If it's a no-go at 27.. I don't think 30 is gonna pass with flying colors... JMHO

Soundguy

Worth hearing SoundGuy. So 32 would be better. Maybe. And if the machine runs a 80% engine/pto ratio I would need 40 engine horsepower.

Back to the thread - 40 would be a 14% increase over stock. Is all this talk about injection pump pressure or timing able to do this as a reliable, as opposed to "hot", mod? Note: I don't think I can do anything about pressure as that would make the timing fuzzy...at least at the injector level.

brickMan

 

[art]

Does adjusting the injection pumps only apply to bigger engines? My Power Trac has a 30hp deutz. It would be nice to get 35hp out of it at times.

I'd say you are asking for too much but if you don't try you won't know! Many will only allow about ten percent increase.

 

[MikeD74T]

A long time diesel mechanic told me that diesel engine life can be rated in gallons, the quicker you burn the fuel the nearer you are to end of life. Whenever someone wanted more power from their truck he made sure they understood the risk of turning up the pumps. Probably like getting 3000hp out of a big block Chevy & having to rebuild it every 1320 feet. MikeD74T

 

[brickMan]

A long time diesel mechanic told me that diesel engine life can be rated in gallons, the quicker you burn the fuel the nearer you are to end of life. Whenever someone wanted more power from their truck he made sure they understood the risk of turning up the pumps. Probably like getting 3000hp out of a big block Chevy & having to rebuild it every 1320 feet. MikeD74T

Yeah, but my body's service life beats the Chevy, whereas the tractors around here beat my nephew's.

 

[whitetiger]

[ quote)Take the TW series tractors ,105-197hp ,Same engine just turbo and intercooler differences,[/quote]

All TW series engines are not the same, severial major differences in them like valves, heads, pistons, rods, crank shaft, flywheel, injectors, intake manifold, exhaust manifold to name a few.