Quote:
Originally Posted by busypaws
You can always put the belt back on if you don't like the feel.
This is just my thinking: (Only been at this for 6 months so----)
1) I have a 5.5 mile commute with 12 stoplights. I don't get above 35 miles per hour.
2) For me to hypermile it will not buy me much to do aero stuff since I never travel fast.
3) I need to work on weight loss for the car. Remember physics inertia is mass times velocity. I need to loose mass to make it easier to accelerate.
4) Rotating mass is worth about 10 times regular vehicle weight. (my rule of thumb)
5) The PS pump weighs about 15 pounds, maybe 5 pounds is rotating. So pulling out the PS pump/hoses saved me 10lbs non-rotating and 5 rotating (equivalent to 50lbs). So in my mind I removed 60 lbs of inertia from the vehicle.
Now I do the AC, lightweight crankshaft pulley, lightweight rims/tires, smallest alternator and I hope to start really affecting the gas mileage in city driving.
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There are two formulae for calculating rotating weight. There is one for vehicle weight, and one for engine/accessory weight.
I believe vehicle weight (rims, tires, etc.) is 7:1... engine weight is significantly less, because of the way that engines rev up and down. It's something like 5:1, IIRC.
Don't quote me on those numbers, though. Calling it 10:1 is very optimistic.
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