Set parking brake properly....
10-13-2011, 09:21 PM
#62
Team Owner
The e-brake (parking brake) is cable operated and uses shoes in a drum. It is a completely separate system from the service brakes which are hydraulic and discs. The best way to set the parking brake is to yank the handle up, not pull it steadily. Shoes in a drum (old fashioned drum brakes) are better for holding a car that is already stopped, disc brakes are better at stopping a car that is moving.
10-13-2011, 10:38 PM
#63
Melting Slicks
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A 4-stroke engine has an intake, compression, power and exhaust stroke. When spun in reverse direction, the engine would build compression during the power stroke. The valves would both be shut and the piston would be traveling from BDC to TDC.
So it really doesn't matter what gear it's in - except that reverse is a deeper gear and should hold the car better.
10-14-2011, 01:18 AM
#64
Race Director
It really doesn't matter. An engine is basically an air-pump and will have compression whether it is spinning clockwise or counter-clockwise. If you've ever tried to crank an engine over by hand (with a ratchet) when timing cams or whatever, you'd find there to be Resistance in either direction.
A 4-stroke engine has an intake, compression, power and exhaust stroke. When spun in reverse direction, the engine would build compression during the power stroke. The valves would both be shut and the piston would be traveling from BDC to TDC.
So it really doesn't matter what gear it's in - except that reverse is a deeper gear and should hold the car better.
A 4-stroke engine has an intake, compression, power and exhaust stroke. When spun in reverse direction, the engine would build compression during the power stroke. The valves would both be shut and the piston would be traveling from BDC to TDC.
So it really doesn't matter what gear it's in - except that reverse is a deeper gear and should hold the car better.
Trans gears determine which way the wheels turn, not which way the engine turns.
10-14-2011, 01:24 AM
#65
Team Owner
10-14-2011, 02:26 AM
#66
Pro
Thread Starter
Gotta agree with the O.P..........the other day I was rushing it and forgot to apply pedal pressure and my car rolled forward about 5 inches once I opened the door........it almost wreaked havoc on my front fascia.......got a small, white paint smudge (which buffed out) from contacting the garage door.
brake is correct on cars using the rear disc brakes as parking brake.
BUT, ...as Swift pointed out to me, our C6's have auxillary shoes and
drums for the PB.
I didn't know this.
To set the PB on C6's .....just YANK it up.
...jerry
10-14-2011, 07:26 AM
#67
Safety Car
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I'm the OP and yes applying pedal pressure while setting the parking
brake is correct on cars using the rear disc brakes as parking brake.
BUT, ...as Swift pointed out to me, our C6's have auxillary shoes and
drums for the PB.
I didn't know this.
To set the PB on C6's .....just YANK it up.
...jerry
brake is correct on cars using the rear disc brakes as parking brake.
BUT, ...as Swift pointed out to me, our C6's have auxillary shoes and
drums for the PB.
I didn't know this.
To set the PB on C6's .....just YANK it up.
...jerry
Glad you gained a bit of knowledge from this discussion.
10-14-2011, 08:37 AM
#68
Melting Slicks
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C1 of Year Finalist (stock) 2019
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This discussion has gotten too silly.
10-14-2011, 09:00 AM
#69
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St. Jude Donor '15
"In honor of jpee"
"Reverse Gear
What about reverse gear? As you can see in Figure 2, the reverse gear is slightly different from the other gears. Instead of the blue gear meshing directly with the red gear, these two gears are separated by a third gear, called the idler, which reverses the direction of rotation.
When a gear turns, its teeth push against the teeth of the meshed gear, turning this gear in the opposite direction. If the red gears are turning counter-clockwise, then the blue gears will be turning clockwise. However, in the case of the reverse gear, the idler gear will be turning clockwise; the blue gear will then be turning counter-clockwise, in the opposite direction from the other blue gears (remember this is possible because none of the blue gears are fixed to the blue shaft.)"
Which comes from this explanation of manual transmissions (Understanding YOur Transmission, Manual or Standard Transmission):
http://defdriving.wordpress.com/2010...transmissions/
10-14-2011, 09:35 AM
#70
Pro
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10-14-2011, 10:06 AM
#71
Melting Slicks
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Yes, a 4-stroke engine will only run in one direction. But, when the engine is off, it can be cranked either direction by mechanical force. Park on a steep enough hill (pointing up the slope) in first gear, and the engine can and will crank backward if forced to.
And if during this same scenario (parked on very steep hill pointing up the hill) the transmission was in reverse, the engine would be forced to turn it's regular direction of rotation by mechanical force. Make sense?
10-14-2011, 10:24 AM
#73
Race Director
What have we learned? The parking brake is sometimes called an emergency brake that doesn't work too well in an emergency. The parking brake system is independent of the main brake system. Hold car with main brake system prior to setting parking brake to hold car from moving while transitioning between brake systems. Always use park, auto transmission or place manual transmission in reverse, in addition to parking brake, when parking vehicle.
10-14-2011, 01:22 PM
#74
Member: Jr Geezer's Club
Oh is that what I'm doing wrong? .... Perhaps that explains why the E-brake in these cars suck so bad.
I have been on aggressive slopes before and I had to shut down engine and leave in-gear (manual) just to exit car momentarily.
I'm on my 3rd C6 and will never get over that the stupid handle will not go all the way flat.
Poor engineering on this part of the car the e-brake is.
I have been on aggressive slopes before and I had to shut down engine and leave in-gear (manual) just to exit car momentarily.
I'm on my 3rd C6 and will never get over that the stupid handle will not go all the way flat.
Poor engineering on this part of the car the e-brake is.
10-14-2011, 02:19 PM
#76
Melting Slicks
thanks for a great laugh, that was way worth the click
Last edited by ohmy; 10-14-2011 at 02:24 PM.
10-14-2011, 02:34 PM
#77
Pro
Thread Starter
and she was really hurt too!
Didn't you read her thread?
10-14-2011, 04:11 PM
#79
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Will this cause damage?
Yes, a 4-stroke engine will only run in one direction. But, when the engine is off, it can be cranked either direction by mechanical force. Park on a steep enough hill (pointing up the slope) in first gear, and the engine can and will crank backward if forced to.
And if during this same scenario (parked on very steep hill pointing up the hill) the transmission was in reverse, the engine would be forced to turn it's regular direction of rotation by mechanical force. Make sense?
And if during this same scenario (parked on very steep hill pointing up the hill) the transmission was in reverse, the engine would be forced to turn it's regular direction of rotation by mechanical force. Make sense?
