Posted by RAB on August 05, 2008 at 23:40:19 from (195.93.21.10):
In Reply to: truck torque posted by matthewh on August 05, 2008 at 18:42:11:
You have to remeber there is no 'free' lunch. All actions have an opposing reaction. Etc, etc.
That said, you will lose something somewhere IF you are getting more total power (presumably only at high revs).
Maybe also you have been inflating your tyres to 0.1 to 0.2 bar less than previous (perhaps the airline where you check the pressure has been 'adjusted/changed)?
Maybe you have changed tyres on the drive wheels to some which are slightly taller in section or higher rolling resistance?
Have you changed grade of gas, as this can alter things? Even the engine oil can have a slight effect.
It might be that things have just tipped the balance, including your gross vehicle weight, and that just makes it unable to keep up without shifting more often.
I think you need to keep an open mind when assessing, and pin-pointing, the reason if it has dropped in torque. Often things that you obviously changed are the main subject of attention and others just 'slip by'.
Just remember they get 7-800 HP out of a 3 1/2 litre engine for F1 but they wouldn't pull even a small 'van, at normal soad speeds, let alone a plough!!
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