5030
Rest in Peace
- Joined
- Feb 21, 2003
- Messages
- 28,967
- Location
- SE Michigan in the middle of nowhere
- Tractor
- Kubota M9000 HDCC3 M9000 HDC
Neophyte:
Actually, gross torque value isn't what you want to know, it's the torque rise that you are interested in. Even though tractor manufacturers don't publish those numbers, a good rule of thumb is:
The longer the stroke and larger the bore of a given engine, the more torque it will produce. That also equates to a torque rise at a lower rpm. Factors like turbocharging and variable injection timing also play important parts, but for your needs, the stroke/bore/rpm works fine. Those are numbers that tractor manufacturers put in their brochures.
Because some tractors engines are made in Japan, some in Italy or Spain, some in Germany and some here, standards for measuring torque are different. The SAE standard is a different standard than say DIN, whereas gross horsepower is a universal standard.
Actually, gross torque value isn't what you want to know, it's the torque rise that you are interested in. Even though tractor manufacturers don't publish those numbers, a good rule of thumb is:
The longer the stroke and larger the bore of a given engine, the more torque it will produce. That also equates to a torque rise at a lower rpm. Factors like turbocharging and variable injection timing also play important parts, but for your needs, the stroke/bore/rpm works fine. Those are numbers that tractor manufacturers put in their brochures.
Because some tractors engines are made in Japan, some in Italy or Spain, some in Germany and some here, standards for measuring torque are different. The SAE standard is a different standard than say DIN, whereas gross horsepower is a universal standard.
