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Old 07-03-2008, 05:52 PM   #1 (permalink)
gascort
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Join Date: Jun 2008
Location: Saint Louis, MO
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Gascort RIP - '93 Ford Escort Wagon
90 day: 43.01 mpg (US)

WifesCruze - '11 Chevrolet Cruze LT
90 day: 31.1 mpg (US)
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"underdrive" power steering pump?

I know, I can buy an underdrive crank pulley for about $130 for my car that will underdrive all my accessories. I'm not interested in shelling out that kind of dough for a mod that might give me 3-4 mpg on the highway.

I know some off road guys, (4x4 with big, near-flat tires) overdrive their power steering pump by altering the high pressure bypass valve in the pump. They want more help in maneuvering giant tires on steep boulders.

I was curious if anyone knew of someone altering it in the other direction; to reduce the amount of assist. I'd be fine with about 25-50% of the assist I currently get. It would also reduce wheel turn with bump starting during a slight turn. (bump starting during a big turn or a slight turn at high speed is dangerous because of the sudden steering response!)

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