Engine braking and physics - Saab General Bulletin Board - Saabnet.com
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When coming up to a stop light, or doing any prolonged slowing down (except going down hills) I have always either pushed my clutch, put it in neutral and used the regular brakes (83 900T). My 2 housemates, (93 and 01 Aeros) like to engine brake as much as possible. When asked why I use my brakes, as opposed to the engine, I tell them that, having done both, I would rather replace my brake pads (or throwout bearing) than my pinion bearing. My thought is that using the engine as a brake adds significant wear on the tranny, but I dont know for sure. Maybe someone with better knowledge of physics can tell me if this is on target? My thinking is that accelerating a 2500 pound car from 10 to 50 mph in (x) time takes (y) energy, and puts (z) wear on the transmission. Wouldnt deaccelerating the same 2500 pound car from 50 to 10 in the same amount of time (x) put roughly (not counting wind resistance etc) the same amount of energy (y) back through the tranny, essentially doubling the amount of wear? Obviously, in normal driving, you spend less time engine braking than accelerating, and you usually accelerate faster than you engine brake, but, the theory is right, right?
CW
posted by 24.195.197...
Posts in this Thread:
- Engine braking and physics, Camm
, Thu, 20 May 2004 19:50:39 <-- Viewing This Message- Don't Forget the Free Cooling, Drew in Houston, Mon, 24 May 2004 13:42:48
- Do tranny's wear out?......, Mike Lynch
, Fri, 21 May 2004 15:27:46 - Re: Engine braking and physics, Camm
, Fri, 21 May 2004 09:30:38 - Re: Engine braking and physics, Dean, Fri, 21 May 2004 07:40:25
- Re: Engine braking and physics, JimBlake
, Fri, 21 May 2004 07:26:25 - too early in the morning to think about numbers,, nt moore, Fri, 21 May 2004 05:33:15
- Re: Engine braking and physics, MJM
, Fri, 21 May 2004 05:30:58
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