Debating on P/S delete.

[sully06]

Originally Posted by Lbar

I thought about doing this in my accord but in a fast acting swerve scenario I would regret that mod. I would hate to not be able to control my car properly to save a little gas.

I thought about that and my wife said the same thing. Always have to pay attention and the good thing is you can't over correct.

[sully06]

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.

Have you tested an alternator this way by chance?

[oil pan 4]

Originally Posted by sully06

Have you tested an alternator this way by chance?

No I have not since the alternator spins at 3 times crank speed.
I would need somthing that could bring the alt up to at least 6000rpms to get an idea of what kind of load the alt puts on the engine.
But from what I have read they only peak at about 50% efficient, mainly due to their extreme high speed.

[California98Civic]

Originally Posted by sully06

I thought about that and my wife said the same thing. Always have to pay attention and the good thing is you can't over correct.

At speeds above a few miles per hour there is really no danger. You'll be able to steer out of an emergency. My car shows almost no difference at all since the PS delete. Smaller and middle-sized cars have PS I think mainly for ease of parallel parking and low speed maneuvering in general (and because people just don't realize they don't need it). Large cars and trucks might be another issue.

[YukonCornelius]

Originally Posted by California98Civic

My car shows almost no difference at all since the PS delete. Smaller and middle-sized cars have PS I think mainly for ease of parallel parking and low speed maneuvering in general (and because people just don't realize they don't need it). Large cars and trucks might be another issue.

Keep in mind your car weighs 700lbs less than his camry

[sully06]

Still going on this tank I will post my results

[YukonCornelius]

I went out to the parking garage at lunch and took the belt off my P/S. Driving is now supplementing the arm workout I never get around to doing.

[sully06]

Originally Posted by Lbar

I went out to the parking garage at lunch and took the belt off my P/S. Driving is now supplementing the arm workout I never get around to doing.

Me to haha

[justme1969]

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.

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.

[oil pan 4]

Originally Posted by justme1969

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.

I am guessing you have not see much of my work.
Of course it was still fully installed. The radiator was out of my truck, the fans and shrouds came out with the radiator (the A/C condenser has been gone since 2008) so there was nothing in front of the accessories. I had plenty of room to finely run a P/S system power consumption test. A test that a lot of people have thought about and indirectly tested but never really proven.
With this test I did not care about how much added power it took for the P/S system to turn the wheels with the vehicle sitting still.
The point was to figure out how much of a load the P/S pump put on the engine while a car was rolling along down the open road, a situation where most people would agree the P/S system is not needed.