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  • 2 votes cast
Apr
24
awarded  Yearling
Apr
23
answered Current from key to solenoid of starter motor relay
Apr
23
answered Odometer gained 65,000 miles after battery replacement
May
10
comment Is brake working with clutch in ford econovan 1989?
I am only a hobbyist but we must work on different cars. In may experience the brakes and clutch draw from the same fluid reservoir. I do agree that if that hasn't gone dry you could bleed them independently. But I would not want to mix new fluid with old so I always bleed them together.
May
7
awarded  Commentator
May
7
comment Typically in what RPM range should one manually downshift an automanual transmission?
Yep, the only thing that disengages the clutch is your foot pressing on the pedal. If anyone is wondering why leaving the clutch engaged is more efficient, on cars with electronic fuel injection the computer can stop the flow of fuel to the engine when decelerating since the car's momentum will keep it spinning. As soon as you put in the clutch it has to start feeding fuel to the engine to keep it idling.
May
7
awarded  Supporter
May
7
comment Fixing small scratches on the body paint
Did you just buy one of those little bottles of touch up paint? That is a different process than if you are going to respray part of the car.
Apr
21
comment Can I reprogram my car for LED turn signals?
@MikeSaull I know he said he did not want to use a resistor, but he also asked to reprogram something without a micro controller. There is no solution for the problem as he specified it, I and others were trying to explain why that is and maybe help find the solution that would work. If the problem is a total fear of resisters wasting energy, I hope nobody mentions how the blower motor speed is controlled :-)
Apr
21
comment Can I reprogram my car for LED turn signals?
@R.. You are right, it does operate by heating up. That is why the flash is faster when there is less resistance in the circuit, less energy is dissipated in the circuit so it is consumed by the heating.
Apr
19
comment Can I reprogram my car for LED turn signals?
What is with the down vote?
Apr
18
answered Can I reprogram my car for LED turn signals?
May
20
answered Good resource for 3rd-row seating safety?
May
19
awarded  Teacher
Apr
22
comment Is high octane fuel a requirement for high-compression engines?
Another interesting thing is even in an unboosted engine with a 10:1 compression ratio you can get more than 10 atmospheres of pressure at the top of the stroke. I always assumed that it would take so long for the air to fill the cylinder that it would not be able to get to 1 atmosphere before the compression stroke started. But apparently in a well designed intake the air will be rushing to the bottom of the cylinder and compressed by the air rushing after it. By closing the intake valve at the right time you can actually trap more air in the dynamic running configuration. Cool!
Apr
21
comment Is high octane fuel a requirement for high-compression engines?
I agree that the pressure when fully compressed will be higher since more air started in the cylinder under boost. But the compression ratio is measuring the volume of the cylinder when it is largest to when it is smallest. The pressure of the incoming gas and the relative pressure outside is not part of the calculation. There are engines in existence that do alter the geometry or retard the valve closing to alter the compression ratio, but that is not boost related.
Apr
20
awarded  Editor
Apr
20
revised OBD2 to bluetooth adaptor for 2001 Renault?
added 227 characters in body
Apr
20
answered OBD2 to bluetooth adaptor for 2001 Renault?
Apr
20
awarded  Student