Manuals,  Tech article

Tech Article: Gearbox efficiency

So, everyone has heard about transmission losses, some claim that the losses are 10-15% on a 2WD car, and I’ve heard about 20-25% on 4WD cars…

Well, first, lets think about the values here… Lets say you’re crusing at the motorway, using maybe 20-25hp… then I could accept the losses are 20-25%.

Now imagine you have a 250hp car, lets say you have 20% losses, that alone is 50hp… So lets tune the car now… to 500hp… according to the tuners and people on the forums you would now have 100hp in transmission losses.

So, lets do a little sanity check.. Take a Nissan Micra, or some other car with about 100hp… are they completely air-cooled, without fans and a lot of fins on the engine? I thought not… you know why? Because 100hp doesn’t self-cool by the wind, and also, you don’t have 100hp in transmission losses.

So this was just to wake up your mind… maybe we should get into some details?

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