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Old 07-19-2010, 08:46 PM
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How much horsepower does power steering rob?

Approx how much horsepower does a GM g body style power steering pump rob?

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Old 07-20-2010, 09:22 AM
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I don't believe it is more than a couple of horse power, not even as much as the alternator I would guess. All I know is, I believe it is a necessary option on a big car.

Let me put it this way, there is NO WAY, NOW WAY you could ever feel it or measure it on the track in the seat of your pants or on a time slip. So if that is where you are going, forgetaboutit.

Brian
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Old 07-20-2010, 11:37 AM
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There have been tests on this.No i dont have the info, but talking to a friend of mine about this awile back who races plymouths from the sixties to current says it takes 15-20 hp to turn the power steering pump and 25 to turn the water pump. We didnt get into a specific car type , but im in no doubt certain he knows the factor it is based on his car.
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Old 07-20-2010, 12:06 PM
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Thanks for the replies.
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Old 07-20-2010, 08:29 PM
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Myself and a friend have both done this, switched from power steering to a manual box. Result was .012-.015 second ET reduction(a tenth and a half) on low 12 second street/strip cars at 3500 and 3700 lbs. Partly from removal of the small "hydraulic dyno"(the pump) on the engine, and partly from the decreased weight of the smaller steering box and removal of the pump, brackets, fluid, and lines.

Both instances this was the only mod made that week, he did it one week and was faster than me, I immediately did it the next week and was back to just faster than he was .

You couldn't feel it in the seat of the pants, but it was reliably there on the time slip.
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Old 07-22-2010, 11:53 PM
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I am going the opposite directly. Usually from my experience a manual steering box has a slower turning ratio, meaning you have to turn the wheel alot more to get it to turn. That is probably to make it a little easier to steering via gear reduction.

I personally dont like that at all. I dont mind the extra effort but i sure wish I didnt have to turn the wheel so far to get it to do anything.
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Old 07-27-2010, 12:41 AM
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I choose not to use any power steering in my race cars, since circle track racers are looking for every little thing, IMO if you can steer it without power steering then go for it
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