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Date: Wed, 17 May 00 16:11:44 GMT
From: amesnopsamrak.demon.co.uk (Andrew Stephenson)
Subject: Re: Chipping / aut.gearbox


In article <3922DC0A.365883DAnopsamhlink.net> kenwashinopsamhlink.net "Ken Washington" writes: > I should have been more specific in my comments. The other > poster got in right in referring to the horsepower difference > in the 9000 Aero 5 spd and auto. The 5 spd got 225 and auto > got 200. A rule of thumb, told to me years ago and still seemingly valid, is that automatic gearboxes cost about 10% of the power developed by the engine. (The mid-1970s figure mentioned was 12%.) Following this line of thought, I'd expect an auto gearbox to get pretty hot, just due to the wasted power. Take the cited figures above: 25 HP going into heat, which is 746*25=18,650 watts. What actually happens? -- Andrew Stephenson

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