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Old 01-18-2013, 11:28 AM   #1
arkus
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Default E parking brake ?

How would you take off from an incline when using a stick shift with the E brake .
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Old 01-18-2013, 11:31 AM   #2
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I never use the e brake. If it's a really steep incline, I usually heel and toe and then let off the brake as the clutch engages.
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Old 01-18-2013, 11:31 AM   #3
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If you need the e-brake to take off from an incline, you shouldn't be driving stick.
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Old 01-18-2013, 11:40 AM   #4
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won't that depend on how steep the hill is ?
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Old 01-18-2013, 11:43 AM   #5
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Quote:
Originally Posted by Bobbyosto View Post
If you need the e-brake to take off from an incline, you shouldn't be driving stick.
Unless you are driving some old beater (been there, done that) where you really gotta work the gas pedal while trying to sart it.
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Old 01-18-2013, 11:47 AM   #6
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Originally Posted by rcallen484 View Post
Unless you are driving some old beater (been there, done that) where you really gotta work the gas pedal while trying to sart it.
sart
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Old 01-18-2013, 11:48 AM   #7
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Quote:
Originally Posted by arkus View Post
How would you take off from an incline when using a stick shift with the E brake .
When the e-brake is on, it will hold the car. As soon as you give the car enough gas to go forward, the e-braked disengages automatically.

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Old 01-18-2013, 11:48 AM   #8
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Just release the clutch until you see/hear a slight loss in engine RPM then add more power, release clutch and parking brake, your on the way. Works great or you can add gobs of power, burn clutch and impress your self.
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Old 01-18-2013, 11:49 AM   #9
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Quote:
Originally Posted by c54u View Post
When the e-brake is on, it will hold the car. As soon as you give the car enough gas to go forward, the e-braked disengages automatically.

Thank You
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Old 01-18-2013, 12:15 PM   #10
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what the hell? seriously?

what happens without battery power? it is an EMERGENCY brake after all.

what happens if you want to use the handbrake for any number of things?

you may WANT to load the car up slightly against the handbrake (test clutch, etc.,). you may WANT to leverage the handbrake while working a car on or off a trailer.

a sports car should be able to do a handbrake turn.

bottom line, just like everything else, only more so (it is an emergency brake after all) it is vital that the e brake ALWAYS DO EXACTLY WHAT YOU TELL IT TO, ONLY WHAT YOU TELL IT TO, AND NEVER ANYTHING YOU DON'T TELL IT TO. It should not rely on battery power to activate or deactivate. it should not 'turn off' when the car begins to move.

surely this is not right?
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Old 01-18-2013, 12:16 PM   #11
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is the handbrake even a separate brake anymore? or just software using the caliper and a button? if so, that's even WORSE.
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Old 01-18-2013, 12:24 PM   #12
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Quote:
Originally Posted by ramey View Post
what happens without battery power? it is an EMERGENCY brake after all.
Life is about managing risks, and the risk of having 100% power loss while moving is nearly nil. It doesn't take much power for the E-brake to actuate the hydraulics of the calipers and lock the tires.

Quote:
what happens if you want to use the handbrake for any number of things?

you may WANT to load the car up slightly against the handbrake (test clutch, etc.,). you may WANT to leverage the handbrake while working a car on or off a trailer.
Why would any of these things not be possible with the E-brake?

Quote:
a sports car should be able to do a handbrake turn.
Oh noes! We can't do bootleggers anymore! I guess we'll just have to kick the *** end out using the engine's prodigious torque, instead.

Quote:
bottom line, just like everything else, only more so (it is an emergency brake after all) it is vital that the e brake ALWAYS DO EXACTLY WHAT YOU TELL IT TO
Go spend some time with the CTS-V guys on the Cadillac forum and ask them if they hate their E-brake or if it's caused them a problem (hint: they don't, and it hasn't). It's the same system, and it works phenomenally well.

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is the handbrake even a separate brake anymore? or just software using the caliper and a button? if so, that's even WORSE.
It actuates the hydraulics for all 4 calipers, bypassing the ABS valve, and it stops the car RIGHT! NOW! This is a bad thing, why? I'm guessing you're going to say something like, "100% brake hydraulics failure"? See my "managing risks" statement above.

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Old 01-18-2013, 12:25 PM   #13
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very good questions .
i dont have the answers
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Old 01-18-2013, 12:33 PM   #14
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Ramey hates electricity. Here is a photo of his seer 14 home air conditioner.

Click the image to open in full size.
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Old 01-18-2013, 12:41 PM   #15
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Quote:
Originally Posted by ramey View Post
is the handbrake even a separate brake anymore? or just software using the caliper and a button? if so, that's even WORSE.
Do not get in a modern airliner.
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Old 01-18-2013, 01:07 PM   #16
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Do not get in a modern airliner.
Yep, but it was so much more fun flying to work back in the early/mid sixties in a dehavilland beaver, then flying to work in a Airbus today.
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Old 01-18-2013, 01:12 PM   #17
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most electric e brakes in new cars still have cable to the brake, servo mtr pulls the cable. I do not believe the corvette has a hyd lock it would be illegal
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Old 01-18-2013, 01:18 PM   #18
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Quote:
Originally Posted by al89 View Post
most electric e brakes in new cars still have cable to the brake, servo mtr pulls the cable. I do not believe the corvette has a hyd lock it would be illegal
I don't believe you're correct. There's nothing on the brake caliper that you can pull with a cable. With the case of the Corvette and the aforementioned CTS-V, the parking/E-brake makes use of the 4 calipers. No extra brake hardware, hub, etc are included.

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Old 01-18-2013, 01:32 PM   #19
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Quote:
Originally Posted by ramey View Post
what the hell? seriously?

what happens without battery power? it is an EMERGENCY brake after all.

what happens if you want to use the handbrake for any number of things?

you may WANT to load the car up slightly against the handbrake (test clutch, etc.,). you may WANT to leverage the handbrake while working a car on or off a trailer.

a sports car should be able to do a handbrake turn.

bottom line, just like everything else, only more so (it is an emergency brake after all) it is vital that the e brake ALWAYS DO EXACTLY WHAT YOU TELL IT TO, ONLY WHAT YOU TELL IT TO, AND NEVER ANYTHING YOU DON'T TELL IT TO. It should not rely on battery power to activate or deactivate. it should not 'turn off' when the car begins to move.

surely this is not right?
Actually it isn't an emergency brake. It is a parking brake. Emergency brakes on cars disappeared a long time ago. When the government mandated dual braking systems on vehicles back in the 60s the separate emergency brake went into the trash heap. Look at the parking brake shoes in your current Vette they are small and will hold the car while parked. Same size shoes come on the 6000 lb trucks. They are thin, narrow and short. If you try and use them as an emergency brake from a high speed you have a good chance of burning them up before the vehicle comes to a stop.

This is the EPB brake description from the 13 Malibu. The Vette should be similar:

"The vehicle has an Electric Parking Brake (EPB). The switch for the EPB is in the center console. The EPB can always be activated, even if the ignition is off. To prevent draining the battery, avoid repeated cycles of the EPB system when the engine is not running. The system has a parking brake status light and a parking brake warning light. See Electric Parking Brake Light on page 516. There are also three Driver Information Center (DIC) messages. See Brake System Messages on page 527. In case of insufficient electrical power, the EPB cannot be applied or released. Before leaving the vehicle, check the parking brake status light to ensure that the parking brake is applied.

EPB Apply
The EPB can be applied any time the vehicle is stopped. The EPB is applied by momentarily lifting up on the EPB switch. Once fully applied, the parking brake status light will be on. While the brake is being applied, the status light will flash until full apply is reached. If the light does not come on, or remains flashing, have the vehicle serviced. Do not drive the vehicle if the parking brake status light is flashing. See your dealer. See Electric Parking Brake Light on page 516. If the EPB is applied while the vehicle is in motion, a chime will sound, and a DIC message will be displayed. The vehicle will decelerate as long as the switch is held in the up position. Releasing the EPB switch during deceleration will release the parking brake. If the switch is held in the up position until the vehicle comes to a stop, the EPB will remain applied. If the parking brake status light flashes continuously, the EPB is only partially applied or released, or there is a problem with the EPB. A DIC message will be displayed. If this light flashes continuously, release the EPB, and attempt to apply it again. If this light continues to flash, do not drive the vehicle.
See your dealer.

If the parking brake warning light is on, the EPB has detected an error in another system and is operating with reduced functionality. To apply the EPB when this light is on, lift up on the EPB switch and hold it in the up position. Full application of the parking brake by the EPB system may take longer than normal when this light is on. Continue to hold the switch until the parking brake status light remains on. If the parking brake warning light is on, see your dealer. If the EPB fails to apply, the rear wheels should be blocked to prevent vehicle movement.

EPB Release
To release the EPB, place the ignition in the ON/RUN position, apply and hold the brake pedal, and push down momentarily on the EPB switch. If you attempt to release the EPB without the brake pedal applied, a chime will sound, and a DIC message will be displayed. The EPB is released when the parking brake status light is off.
If the parking brake warning light is on, the EPB has detected an error in another system and is operating
with reduced functionality. To release the EPB when this light is on, push down on the EPB switch and hold it in the down position. EPB release may take longer than normal when this light is on. Continue to hold the switch until the
parking brake status light is off. If the light is on, see your dealer. Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving.

Automatic EPB Release
The EPB will automatically release if the vehicle is running, placed into gear, and an attempt is made to drive away. Avoid rapid acceleration when the EPB is applied, to preserve parking brake lining life."


Bill

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Old 01-18-2013, 01:41 PM   #20
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Quote:
Originally Posted by Bill Dearborn View Post
Actually it isn't an emergency brake. It is a parking brake.
Bill's more right than I am in this case (or more accurate). The system will stop the car in an emergency if needed, though. However, since it locks the calipers and bypasses the ABS valve, the stop is sudden and violent, and you'll risk seriously flat-spotting your tires.

My CTS-V development buddy suggested I test it when I had my V several years ago. But he warned me to be quick about it, and make sure there was no one else anywhere near me. He was 100% right: the car felt like a 1000-ft giant had stepped on it and squished it into the road. Fortunately I was quick enough to release it before lock-up, so no tires were harmed in that test.

jas
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Old 01-18-2013, 01:41 PM
 
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