Same Engine, Different Horsepower

[ovrszd]

I don't remember the specifics, or how it varied among the 55hp and 65hp too, but it seems you got a lot more bang for a few more bucks.

It's usually the opposite. If all you need is 45hp it's not financially feasible to pay for the higher HP. You have an example in your 5075E. Do you recall the price difference to go up a size?

 

[Industrial Toys]

The good thing is, that I can still up the HP of my JD6200. And do so with relative confidence. My 15" wood chipper is a bit large for my 6200 and the Mennonites say they can up my HP. Probably waay cheaper than what a 6300 or 6400 would have cost. But for twenty something years, I never needed or missed the HP but appreciated the larger size often.

 

[buickanddeere]

I致e been looking at some compact tractors and I知 confused about something. Spec sheets show 3 different HP ratings (40, 45, 50) but all 3 tractors have same engine, same frame, and same weight. What makes the difference in HP?

No different than having three different engine choices when ordering a pickup truck .

 

[ovrszd]

No different than having three different engine choices when ordering a pickup truck .

Aren't your choices in the trucks an entirely different engine?

 

[Gary Fowler]

Aren't your choices in the trucks an entirely different engine?

Sometimes, but every engine has several HP ratings for the same bore/stroke depending on which car it is used in and what they want to do with it. Many times the same block will be used but change the valve train or intake manifold/fuel injection etc to gain hundreds of HP differences.

 

[ovrszd]

Sometimes, but every engine has several HP ratings for the same bore/stroke depending on which car it is used in and what they want to do with it. Many times the same block will be used but change the valve train or intake manifold/fuel injection etc to gain hundreds of HP differences.

Aww yes, I agree there.

I was thinking narrow mindedly of trying to buy a new F250 and making an engine choice based on HP.

 

[Sawyer Rob]

I remember the time GM used the same block in it's gasoline engine and it's Olds diesel engine. That particular time things didn't go well.

This is not accurate, it used the same DESIGN, NOT the same block.

The diesel block was beefed up internally, but it didn't have any more head studs and other important things like that, so it failed under the higher compression.

SR

 

[Sawyer Rob]

My neighbor and I have the same brand tractor, his is 60hp mine is 50hp. They ARE the exact same tractor through and through, except for tire size and pump settings. (mechanical pumps)

I've used his tractor quite a bit, as we hay together, and his has noticeable more power over mine. You can really feel the difference with the extra pto power, when it's needed.

Some new bigger tractors (electronic pump) will up the power automatically, when you have something hooked to the pto that's a big power draw. Some will go up 20hp or more when needed for a limited amount of time...

SR

 

[stuckmotor]

This is not accurate, it used the same DESIGN, NOT the same block.

The diesel block was beefed up internally, but it didn't have any more head studs and other important things like that, so it failed under the higher compression.

SR

Thank you Rob. I've taken down my message. As I get older, I don't seem to remember details as well as I used to and I don't want to disseminate inaccurate information.

 

[finn1]

Having lower engine torque output in lower gears is a way of being able to produce a machine wilt a low capacity driveline and still advertise high power. Auto manufacturers have used torque limiting strategies in the lower gears and on shifting for years for the same reason: keep the loads on the transmission and drivetrain down for reliability.

Electronics make many things possible.

 

[ovrszd]

Having lower engine torque output in lower gears is a way of being able to produce a machine wilt a low capacity driveline and still advertise high power. Auto manufacturers have used torque limiting strategies in the lower gears and on shifting for years for the same reason: keep the loads on the transmission and drivetrain down for reliability.

Electronics make many things possible.

My wife's Hemi Grand Cherokee comes off the throttle every time the auto trans shifts, regardless of where you have the gas pedal, even with it to the floor.

 

[finn1]

This is not accurate, it used the same DESIGN, NOT the same block.

The diesel block was beefed up internally, but it didn't have any more head studs and other important things like that, so it failed under the higher compression.

SR

. The Olds Diesel was based on gas engine tooling, but the block was significantly altered during the dieselization program.

Deere, International, Ford, and many others used a similar stategy, albeit successfully, to build both gasoline and Diesel engines on the same line, with the same architecture.

The Ford/International 6.9 was based on the International MV gasoline architecture, albeit wiith additional head bolts and a lot of beefing up. Those engines went 500k to a million miles when properly maintained.

Even VW Diesels were based on common diesel architecture.

 

[buickanddeere]

This is not accurate, it used the same DESIGN, NOT the same block.

The diesel block was beefed up internally, but it didn't have any more head studs and other important things like that, so it failed under the higher compression.

SR

The Olds diesel failed because the bean counters cheapened the engine from what the engineers wanted . The last year or two of production did have high nickel blocks, proper fuel filters and roller cam followers. By that time however the reputation was ruined.

 

[Sawyer Rob]

Two big failures killed the 350 diesel...

First, they used the same amount/size of head bolts, gaskets failed, so GM speced a higher torque, that caused head bolt stretching and gasket failed! Finally, they sized the head bolts to a larger size with higher torque, and that pretty much fixed that.

By then, everyone was pretty fed up with the 350 diesel, but the metric 200 trannys failed left and right too, and that was the last straw.

SR

 

[nova3930]

Having lower engine torque output in lower gears is a way of being able to produce a machine wilt a low capacity driveline and still advertise high power. Auto manufacturers have used torque limiting strategies in the lower gears and on shifting for years for the same reason: keep the loads on the transmission and drivetrain down for reliability.

Electronics make many things possible.

Ram trucks with the Cummins 6.7 have an aggressive torque limiting scheme in the ECM because if you give a 68RFE transmission the full torque the 6.7 is capable of from a dead stop, you will blow it all to pieces.

 

[Sawyer Rob]

A GM tech. guy stated that, that was true for the thousand pounds of torque option Cummins, then he went on to add, that the Duramax puts out 950 pounds of torque and GM does NOT de-rate/limit the engine/torque in any gear, including low gear.

SR