sportser torque

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Jan 10, 2014 | 09:00 PM

5150northrider

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Joined: Jan 2014

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From: Montana

sportser torque

I read it on the HD web page! Looks like the same way they have always rate it but the 2014 has 9 ft-lbs less then before!

Jan 11, 2014 | 03:01 AM

USAFANG67

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Joined: Mar 2012

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From: Florida

Quote:

Originally Posted by Willis 48

I read it on the HD web page! Looks like the same way they have always rate it but the 2014 has 9 ft-lbs less then before!

If you look at the model from past year it's measured at a different RPM. Plus the compression ration is different. Not sure if this is all for the better or not.

Jan 11, 2014 | 03:45 AM

Hopper

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Joined: Dec 2007

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From: Styxville

All depends on the way they squinted at the dyno chart.

Jan 11, 2014 | 03:41 PM

Zenmervolt

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Joined: Jan 2009

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From: Seattle, WA

Quote:

Originally Posted by USAFANG67

If you look at the model from past year it's measured at a different RPM. Plus the compression ratio is different. Not sure if this is all for the better or not.

Not to be too pedantic, but it's not simply "measured" at a different RPM, the peak value actually occurs at a different RPM. It's not as though they simply changed the RPM they measure at with the engine's power curve remaining the same.

The 2013 engines had a peak torque value of 79 ft-lbs, and this peak is achieved at 3,250 RPM.

The 2014 engines have a peak torque of only 70 ft-lbs, and this peak is achieved at 3,500 RPM.

The higher compression ratio, combined with a reduction in peak torque and the drift of the torque peak to a slightly higher RPM suggests that the engine has been modified to make it more suitable for high-RPM operation. On the 2013 and earlier engines the torque falls off fairly hard after 4,000 RPM and it would make sense that Harley might be looking to improve the high-RPM performance at the expense of a little bit of low-end torque.

This is just speculation without a full dyno curve for the 2014 engines to look at, but it makes sense.