Peak torque of 2 BRg and 3 Brg

[wild_willy]

Would anyone happen to have a torque figure @ RPM for late 2 bearing and 3 bearing engines? Searched Forum and internet to no avail.
Many thanks for your assistance.
Bruce

[John Cornforth]

Hi

The figures I have are 23 lbs-ft at 2000 RPM for early low compression, and 29 lbs-ft at 2000 RPM for the high compression (latter data from the Thetis marine engine brochure). Both torque curves do not change a great deal over the range 1500 to 3000 RPM

[Colin Morgan]

As horsepower and torque are related, the torque can be calculated for any known power output @ a particular RPM.  For example, Austin quote 17bhp at 3800rpm, which equates to a torque of 23.5 ftlbs.  (10bhp at 2200 rpm gives 23.9rpm.)

This site does the calculation:

https://spicerparts.com/calculators/hors...horsepower).

[wild_willy]

Thanks John and Colin. Just what i needed. Loved the Thetis brochure.