Quote:
Originally Posted by oil pan 4
I recently did a test where I spun the P/S pump up to different speeds using a power drill, optical tachometer and kill-a-watt meter.
The results were at 850 RPMs the P/S pump took almost no power to spin at that speed only detected about a 150 watt draw.
The posibility of gaining any MPG improvement form a P/S delete were looking to be slim to none.
But when I did the test at a more normal cruising speed of 2000RPMs the P/S power consumption jumped to about 500 watts.
For a small car that turns higher RPMs on the highway that should make at least a 1MPG difference.
With my suburban a 500 watt accessory reduction should make at least a half MPG difference.
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That is ok but your missing the resistance. the stystem resistance at Idle is probbably double what you got unless the hydraulic pump was still fully attached to the car.
This is sorta like testing amps on an electric motor thats disconnected.
Then the worst case resistance would be to turn the wheels sitting still That would probbably burn up your drill motor in a short time.