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re: Question for gearheads

Posted on 3/2/16 at 1:57 pm to
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 3/2/16 at 1:57 pm to
It saves the clutch and slave cylinder and throw out bearing.
Posted by N2cars
Member since Feb 2008
40342 posts
Posted on 3/2/16 at 1:57 pm to
Brake pads are much cheaper than transmissions, remember that.

So doing this:
quote:

a) downshift and then slow down in gear, or


is not preferred.

Obviously a track situation is different as in coming out of corner, etc.


On a street car, think about being as smooth as possible on all components.

Posted by toosleaux
Stuck in Baton Rouge traffic
Member since Dec 2007
9497 posts
Posted on 3/2/16 at 1:57 pm to
I prefer to pull the emergency brake.
Posted by AwesomeSauce
Das Boot
Member since May 2015
11633 posts
Posted on 3/2/16 at 1:57 pm to
quote:

The frick?

Engine braking will destroy a clutch as well as put several other components at risk. Please put your drivetrain under unnecessary strain.

But hey, maybe I'm wrong, it has been 7 years since I got my A3, so it's no longer valid.
Posted by LNCHBOX
70448
Member since Jun 2009
89397 posts
Posted on 3/2/16 at 1:59 pm to
quote:

Engine braking will destroy a clutch as well as put several other components at risk. Please put your drivetrain under unnecessary strain.


I'm not talking about engine braking from 6000 rpm and not using the brakes at all. But if I'm going from 70 to 35, I'm dropping a gear or two. My car also has 6 speeds.
Posted by Nado Jenkins83
Land of the Free
Member since Nov 2012
66528 posts
Posted on 3/2/16 at 2:00 pm to
I don't see a need for high revs while not accelerating.
Posted by Spirit of Dunson
Member since Mar 2007
23112 posts
Posted on 3/2/16 at 2:00 pm to
quote:

Who taught you people to drive like this?

Your mother.
Seriously, I already said no one taught me. I've driven a standard since I was 18, and have always done this. Never had a good reason one way or the other. That's why I asked here... To see experts argue it out.

And my car also has 6 speeds. And I often have to go from 70 mph down to 40 mph when the road changes designation (interstate changes to 2 Lane road).
This post was edited on 3/2/16 at 2:02 pm
Posted by Gaston
Dirty Coast
Member since Aug 2008
41694 posts
Posted on 3/2/16 at 2:00 pm to
How does it destroy the clutch if you rev match? Seems like the clutch is out the equation at that point...if done correctly.
This post was edited on 3/2/16 at 2:01 pm
Posted by Breesus
Unplug
Member since Jan 2010
69549 posts
Posted on 3/2/16 at 2:01 pm to
The thing people don't realize about the Gear Wars is that it was never really about the gears at all.
Posted by Hammertime
Will trade dowsing rod for titties
Member since Jan 2012
43031 posts
Posted on 3/2/16 at 2:01 pm to
You wanna slow down faster in fourth, or coast and slow down slower? I always matched RPMs and downshifted
Posted by LNCHBOX
70448
Member since Jun 2009
89397 posts
Posted on 3/2/16 at 2:01 pm to
Coasting down the road out of gear is unsafe. No reason to do it. I get the feeling I'm getting all these downvotes because people think I'm advocating to never use the brakes, but that's not what I'm saying at all.
Posted by BoostAddict
Member since Jun 2007
3259 posts
Posted on 3/2/16 at 2:04 pm to
quote:

Engine braking will destroy a clutch as well as put several other components at risk. Please put your drivetrain under unnecessary strain.

But hey, maybe I'm wrong, it has been 7 years since I got my A3, so it's no longer valid.




No it won't. In normal driving situations, it has zero effect on the clutch. It has zero effect on the engine.
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 3/2/16 at 2:05 pm to
quote:

How does it destroy the clutch if you rev match? Seems like the clutch is out the equation at that point...if done correctly.


because once the clutch is mated to the flywheel and the vehicle is in gear the forces that work to make the clutch slip(even though it doesn't because of the friction material in the disc) put un needed stress on the components.
Posted by Gaston
Dirty Coast
Member since Aug 2008
41694 posts
Posted on 3/2/16 at 2:07 pm to
I buy that, even though I don't fully understand it.
Posted by meauxjeaux2
watson
Member since Oct 2007
60283 posts
Posted on 3/2/16 at 2:09 pm to
it's not necessarily the pressure of the clutch disc pushing against the flywheel that prevents slippage. Its a combination of that and the friction material in the disc. That friction will eventually fade as it's used
Posted by AwesomeSauce
Das Boot
Member since May 2015
11633 posts
Posted on 3/2/16 at 2:10 pm to
quote:

it has zero effect on the clutch. It has zero effect on the engine.




Posted by LNCHBOX
70448
Member since Jun 2009
89397 posts
Posted on 3/2/16 at 2:11 pm to
You're advocating for coasting around out of gear, not sure you have much room to laugh at anyone.
Posted by BoostAddict
Member since Jun 2007
3259 posts
Posted on 3/2/16 at 2:11 pm to
quote:

it's not necessarily the pressure of the clutch disc pushing against the flywheel that prevents slippage. Its a combination of that and the friction material in the disc. That friction will eventually fade as it's used




Under normal driving, the torque on the clutch from engine braking is minimal. I think there would be little additional clutch wear from this.
Posted by AwesomeSauce
Das Boot
Member since May 2015
11633 posts
Posted on 3/2/16 at 2:12 pm to
quote:

How does it destroy the clutch if you rev match? Seems like the clutch is out the equation at that point...if done correctly.

Well you are talking about lowering RPM in gear then shifting down. The OP was talking about engine braking. Going into a lower gear to slow down, these are different.
Posted by LNCHBOX
70448
Member since Jun 2009
89397 posts
Posted on 3/2/16 at 2:13 pm to
quote:

The OP was talking about engine braking.


He didn't expressly say that anywhere in the OP.
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