Double clutch vs power shift

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smitbrandon
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Double clutch vs power shift

Post by smitbrandon »

Right guys,

So as the title states, I'm looking for the technical answer behind the pros and cons on these two infamous techniques when you are busy racing your wife home from work.

But seriously I am interested to know which of the two are superior, perhaps the drag pros can throw in a little advice or two?

Thanks.

Just another young enthusiast.

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Re: Double clutch vs power shift

Post by chucker02 »

Why? What does it matter? Both are idiotic anyway
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Rides thread: http://vwclub.co.za/forum/viewtopic.php?f=11&t=183329
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smitbrandon
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Re: Double clutch vs power shift

Post by smitbrandon »

You aren't answering the question

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Re: Double clutch vs power shift

Post by panic-mechanic »

Double clutch is used by trucks with crash boxes ie. a gearbox that has no synchro mesh. It is totally stupid to do that in a car that has syncro mesh and it is a very slow way to shift gears.
Power shift ie. flat foot on the throttle is all good and well till you miss a shift and end up blowing the motor up. Yes you always hope the rev limiter might catch it. It is also bad for gearboxes and if you feel you HAVE to do it rather get something like a wotbox that holds the RPM down between shifts
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Re: Double clutch vs power shift

Post by chucker02 »

smitbrandon wrote:You aren't answering the question

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Wasnt really trying to
Current:

2006 Citi Golf 2E, Dictator, 4-2-1

Ex:
2003 Audi A3 1.8t, Thanas Tuned, FMIC, coilies, DP and exhaust
2007 Citi golf. ADY with Spitronics 60-2, estas 282, 4-2-1, coilies
Rides thread: http://vwclub.co.za/forum/viewtopic.php?f=11&t=183329
2002 Citi golf. ADY carb, estas 282, 4-2-1, GW delarey big brake kit.
Rides thread: http://vwclub.co.za/forum/viewtopic.php?f=11&t=157603
1971 VW beetle
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Re: Double clutch vs power shift

Post by Tatouch »

smitbrandon wrote:Right guys,

So as the title states, I'm looking for the technical answer behind the pros and cons on these two infamous techniques when you are busy racing your wife home from work.

But seriously I am interested to know which of the two are superior, perhaps the drag pros can throw in a little advice or two?

Thanks.

Just another young enthusiast.

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Have also wondered if there are any benefits to power shifting and double clutching. I have heard many vehicles being doubled clutched while taping the throttle in between but when I thought about it, its actually slower than just snap into the next gear but due to taping the throttle I thought maybe there's match reving involved but could never find out if any benefit of it (Sounds good though).

When it comes to power shifting, a friend of mine has a opel ute 1.7dti...He likes powershifting when he's dragging robot to robot. Compared to normal shifting, it feels faster and as if the shifts are more powerful. Can someone please explain why is this. And also, is it worth it to powershift on an n/a vehicle
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Re: Double clutch vs power shift

Post by amstel18 »

And this ladies and gentlemen, is why DSG was invented
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Re: Double clutch vs power shift

Post by smitbrandon »

chucker02 wrote:
smitbrandon wrote:You aren't answering the question

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Wasnt really trying to
Then go troll elsewhere

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Re: Double clutch vs power shift

Post by smitbrandon »

panic-mechanic wrote:Double clutch is used by trucks with crash boxes ie. a gearbox that has no synchro mesh. It is totally stupid to do that in a car that has syncro mesh and it is a very slow way to shift gears.
Power shift ie. flat foot on the throttle is all good and well till you miss a shift and end up blowing the motor up. Yes you always hope the rev limiter might catch it. It is also bad for gearboxes and if you feel you HAVE to do it rather get something like a wotbox that holds the RPM down between shifts
Ah okay I see now. So for a standard car this wouldn't really matter much. Thanks panic
amstel18 wrote:And this ladies and gentlemen, is why DSG was invented
Makes sense now Image

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smitbrandon
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Re: Double clutch vs power shift

Post by smitbrandon »

Tatouch wrote:
smitbrandon wrote:Right guys,

So as the title states, I'm looking for the technical answer behind the pros and cons on these two infamous techniques when you are busy racing your wife home from work.

But seriously I am interested to know which of the two are superior, perhaps the drag pros can throw in a little advice or two?

Thanks.

Just another young enthusiast.

Sent from my E5823 using Tapatalk
Have also wondered if there are any benefits to power shifting and double clutching. I have heard many vehicles being doubled clutched while taping the throttle in between but when I thought about it, its actually slower than just snap into the next gear but due to taping the throttle I thought maybe there's match reving involved but could never find out if any benefit of it (Sounds good though).

When it comes to power shifting, a friend of mine has a opel ute 1.7dti...He likes powershifting when he's dragging robot to robot. Compared to normal shifting, it feels faster and as if the shifts are more powerful. Can someone please explain why is this. And also, is it worth it to powershift on an n/a vehicle
Dude I used to do this on my n/a 1.4 polo and i used to spank the guys with their bmw 318i, 320i, Toyota bakkies but not the the 3.0, runx 1.6, gave me a lekker push because I was lighter than them but I think the gearbox hated me for doing it Image

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Re: Double clutch vs power shift

Post by Donavan »

Lol, drag racing with an opel corsa diesel bakkie.................. :lol: :lol: :lol:
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Re: Double clutch vs power shift

Post by chucker02 »

Donavan wrote:Lol, drag racing with an opel corsa diesel bakkie.................. :lol: :lol: :lol:
:lol:
Current:

2006 Citi Golf 2E, Dictator, 4-2-1

Ex:
2003 Audi A3 1.8t, Thanas Tuned, FMIC, coilies, DP and exhaust
2007 Citi golf. ADY with Spitronics 60-2, estas 282, 4-2-1, coilies
Rides thread: http://vwclub.co.za/forum/viewtopic.php?f=11&t=183329
2002 Citi golf. ADY carb, estas 282, 4-2-1, GW delarey big brake kit.
Rides thread: http://vwclub.co.za/forum/viewtopic.php?f=11&t=157603
1971 VW beetle
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Re: Double clutch vs power shift

Post by THANAS »

The only useful shifting 'technique' is No-Lift shifting for turbocharged cars and that requires assistance from the ecu or a unit that cuts ignition between shifts. This whole thread is on the same level as a 'Which cone filter is the best for my 1.3 carb?' thread
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Re: Double clutch vs power shift

Post by HendrikCTI »

Double clutch was used quite allot on old army trucks and also on the old trucks. Panic's explanation is 100% correct.
I remember something with it doesn't want to go into gear and then you have to blimp the throttle to get it to work. Sometimes you heard the driver crunching the gears when it doesn't want to go into gear.

Power shift your drive train will not last long. HUGE shock loads being put through the whole system.

Both can be done on modern cars but as explained in the above posts by the more experienced guys on the forum, it is utterly useless in modern technology cars and even trucks.
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Re: Double clutch vs power shift

Post by Jueshen »

even with a wotbox or nls in tune powershifting / NLS can be dangerous and it is easy to miss a gear.
my redline in the pgti was increased to if i can remember to around 7700-7900 on a stock head
i think did the money shift once from 3 into 2 well over 7500rpm and thank goodness the only thing that broke was that my gear selector jumped out and i only had use of 2 gears until it was pushed back into place.
either thats what happend or it gated me going into 4 but damn it was scary

it could have been much worse
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Re: Double clutch vs power shift

Post by smitbrandon »

Hectic

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Re: Double clutch vs power shift

Post by Howie-WP »

HendrikCTI wrote:Both can be done on modern cars but as explained in the above posts by the more experienced guys on the forum, it is utterly useless in modern technology cars and even trucks.
But it sounds cool when telling stories about how you smoked another car when doing a TLGP..... :crazy: :bang:
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Re: Double clutch vs power shift

Post by Neuk »

Howie-WP wrote:
HendrikCTI wrote:Both can be done on modern cars but as explained in the above posts by the more experienced guys on the forum, it is utterly useless in modern technology cars and even trucks.
But it sounds cool when telling stories about how you smoked another car when doing a TLGP..... :crazy: :bang:
I am disappointed that we haven't had any feedback from Dominic Toretto.
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Re: Double clutch vs power shift

Post by MarshallGTi »

THANAS wrote: This whole thread is on the same level as a 'Which cone filter is the best for my 1.3 carb?' thread
but which is best??? we neeeed to know how to make a mk1 citi go vvrrrphaa :troll:
It is an ingenius solution to a problem that should have never existed in the 1st place...

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Re: Double clutch vs power shift

Post by smitbrandon »

MarshallGTi wrote:
THANAS wrote: This whole thread is on the same level as a 'Which cone filter is the best for my 1.3 carb?' thread
but which is best??? we neeeed to know how to make a mk1 citi go vvrrrphaa :troll:
Lmao #DEAD

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Re: Double clutch vs power shift

Post by Howie-WP »

Neuk wrote:I am disappointed that we haven't had any feedback from Dominic Toretto.
He is busy over nighting parts from Germany...........
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Re: Double clutch vs power shift

Post by Abnormal »

Howie-WP wrote:
Neuk wrote:I am disappointed that we haven't had any feedback from Dominic Toretto.
He is busy over nighting parts from Germany...........
thought it was Japan
\Oo) \ _w_ / (oO/
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Re: Double clutch vs power shift

Post by Howie-WP »

Abnormal wrote:
Howie-WP wrote:
Neuk wrote:I am disappointed that we haven't had any feedback from Dominic Toretto.
He is busy over nighting parts from Germany...........
thought it was Japan
Ja, but we're on a VW forum, hence parts needed to be over nighted from Germany :troll:
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Re: Double clutch vs power shift

Post by Abnormal »

:lol: :lol:
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