Comments on: Tech Talk: How Power Torques. https://www.privatefleet.com.au/blog/home/tech-talk-how-power-torques/ News and views about cars in Australia Tue, 22 Aug 2023 08:25:39 +0000 hourly 1 https://wordpress.org/?v=6.1.5 By: CW https://www.privatefleet.com.au/blog/home/tech-talk-how-power-torques/#comment-5670 Wed, 01 Mar 2017 02:27:06 +0000 http://www.privatefleet.com.au/blog/?p=7388#comment-5670 “Because the crank is spun by the reaction of fuel being compressed to explosion”,
this is completely wrong, air is in the cylinder and compressed becoming very hot, fuel is injected into the hot compressed air and it is a controlled burn not an explosion, diesel manufactures go to great lengths to prevent explosion,because it destroys the engine.

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By: Dave Conole https://www.privatefleet.com.au/blog/home/tech-talk-how-power-torques/#comment-5663 Tue, 28 Feb 2017 03:35:41 +0000 http://www.privatefleet.com.au/blog/?p=7388#comment-5663 In reply to Alexander McClintock.

Find a manual car with a small and less torquey engine than a car fitted with a V8 or turbo engine. Start off in fourth and see which is most effective in getting the car going. Kilowatts have nothing to do with getting a car under way, torque does. Gear ratios are slected to suit the characteristics of the engine, not the other way around. We’ll even go so far as to offer that’s why some racing categories have changeable ratios allowed for different circuits, due, again, to the torque, with kW coming into play at speed.

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By: Alexander McClintock https://www.privatefleet.com.au/blog/home/tech-talk-how-power-torques/#comment-5662 Tue, 28 Feb 2017 03:06:09 +0000 http://www.privatefleet.com.au/blog/?p=7388#comment-5662 Why are the gears not fully considered in these statistics?
I say to myself that if automatic gears were changing optimally then there would be little difference between Torque and Kw.
I’ve not seen this stated but surely this must be the case except in 1st gear?
If there were gearboxes with 20 speeds surely kW would be the best predictor of 0-100 KPH?
The typical, simple discussion assumes there is only one gear!

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By: Tom Mulligan https://www.privatefleet.com.au/blog/home/tech-talk-how-power-torques/#comment-5661 Tue, 28 Feb 2017 03:03:53 +0000 http://www.privatefleet.com.au/blog/?p=7388#comment-5661 As a matter of record the only measurable output of an engine is Torque. Horse Power (or Kilowatts) is derived by using a mathematical function. which relates a number given RPM and torque at those Revs.

The formula is:
Power (kW) = Torque (N.m) x Speed (RPM) / 9.5488

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