does double clutch extend clutch's life?

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does double clutching extend clutch life.

yes
2
10%
no
18
90%
 
Total votes : 20

Postby 1BADGT4 » Thu Jul 27, 2006 10:25 pm

Simba wrote:
syko says wrote:Dry shifting has nothing to do with power shifting, and is done without a clutch.


Not phyiscally, but idealy. There is that point where there is a really light load with the tranny/ gears and motor.
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Postby Mafix » Thu Jul 27, 2006 10:33 pm

yes there is but it is extremely hard to hit and otherwise pointless to do because it happens on the down side of RPM. you can shit into gears without the clutch but pray the tranny holds up.
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Postby 1BADGT4 » Fri Jul 28, 2006 12:26 am

Mafix wrote:yes there is but it is extremely hard to hit and otherwise pointless to do because it happens on the down side of RPM. you can shit into gears without the clutch but pray the tranny holds up.


I wouldn't say its point-less. Hey, anything that preserves the life of my clutch, I'm for it! It is a #$%& to do my/ our clutches :shoots:.

I'm not sure if you meant at the lower rpms or when the engine is revving-down but, its all over the rpms - it depends on how much throttle/ load.

Mafix wrote:you can shit into gears without the clutch but pray the tranny holds up.


Like I said ... if one is doing it correctly, nothing negative can happen.
:wink: I've been doing this on my bikes for a total of 14k miles.

Just curious ... have you seen someone do properly?
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Postby theUNYTEDone » Fri Jul 28, 2006 9:47 am

yes i have. a bunch of my ricer friends brag that they can "dry shift"...so i dont care for it much. there's an easy way to get to neutral...just apply pressure to your stick while driving. if it's no vibrating, then it'll be able to be put into N.

for drag purposes, i do also agree that power shifting is beneficial.
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Postby 1BADGT4 » Sat Jul 29, 2006 1:42 am

theUNYTEDone wrote:there's an easy way to get to neutral...just apply pressure to your stick while driving. if it's no vibrating, then it'll be able to be put into N.


Thats the point in time where there is the least amount of load on the motor/ tranny.
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Postby theUNYTEDone » Sat Jul 29, 2006 5:25 am

1BADGT4 wrote:
theUNYTEDone wrote:there's an easy way to get to neutral...just apply pressure to your stick while driving. if it's no vibrating, then it'll be able to be put into N.


Thats the point in time where there is the least amount of load on the motor/ tranny.


i figured as much.
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Postby jprine01 » Sun Jul 30, 2006 6:28 am

Simba wrote:Dry shifting has nothing to do with power shifting...

I am supprised so many people thought power shifting was jamming it into gear without using the clutch. It is normal shift but keeping the throttle wide open, I know some people that have broke their tranny power shifting.
I think its mostly done when idiots want to do a burnout in a car that isn't really capable of breaking the tires loose normally and they want to show off.
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Postby 1BADGT4 » Sun Jul 30, 2006 8:17 am

jprine01 wrote:
Simba wrote:Dry shifting has nothing to do with power shifting...

I am supprised so many people thought power shifting was jamming it into gear without using the clutch. It is normal shift but keeping the throttle wide open


??? Isn't "power shifting jamming it into gear without using the clutch"? I think you're confused.

How power shifting works is by going WOT, then when fuel cut kicks in = load drops, this allows one to shift to the next gear with little effort. But you gotta be fast enough.
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Postby jprine01 » Thu Aug 03, 2006 6:12 am

"The science of power shifting, which is the act of changing gears with a manual transmission with the engine at wide-open throttle, is a lost art in today's world of air-shifted two-speed Powerglides. Power shifting requires the hand-foot coordination of a tap-dancing juggler because the timing of the hard yank of the shift lever must be carefully synchronized with the minimal application of the clutch pedal to prevent the over-revving of the engine."

From: http://www.nhra.com/50th/top50/r_sox15.html
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Postby syko says » Thu Aug 03, 2006 8:27 am

going back to double clutch etc etc

grip addict wrote:not rematching during a downshift is actually called clutch braking

:P


in contrast to rev limiting and saving your tranny.. is 'clutch braking' unhealthy for the tranny??? not that i do it or anything.. just out of curiousuty.
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Postby Simba » Thu Aug 03, 2006 1:44 pm

1BADGT4 wrote:How power shifting works is by going WOT, then when fuel cut kicks in = load drops, this allows one to shift to the next gear with little effort. But you gotta be fast enough.


Power shifting has been around a lot longer than EFI and rev limiters. :)

On a modern car, it's easy. Try it on a carbed big block without blowing something up.

In the old days, you had to be very, very fast in order to power shift properly without popping the engine. These days any idiot can do it.

Lots of fast, loud things.
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Postby Simba » Thu Aug 03, 2006 1:46 pm

syko says wrote:is 'clutch braking' unhealthy for the tranny???


Assuming you mean downshifting without rev matching, yes, it puts a good deal of stress on the clutch and tranny, and everything else in the driveline.

However, compression braking with a revmatch is fine.
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Postby 1BADGT4 » Thu Aug 03, 2006 9:14 pm

Simba wrote:
1BADGT4 wrote:In the old days, you had to be very, very fast in order to power shift properly without popping the engine. These days any idiot can do it.


Does that mean we're all idiots? :twisted:
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Postby Simba » Thu Aug 03, 2006 11:04 pm

1BADGT4 wrote:Does that mean we're all idiots? :twisted:


No, it means technology has made something that was once very hard easy enough for an idiot to do. ;)
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Postby StranD » Tue Aug 15, 2006 3:22 am

Hey, I have a totally different idea of what double clutching is compared to Simba's description on the last page...

Double clutch:

engage clutch
shift to neutral
disengage clutch
blip (tap gas to match rev)
engage clutch
shift to lower gear
disengage clutch

I've been doing this for years ever since my uncle taught me how (he drives a 52 Chev with a California kit).

It's a bit like dancing but most of the time you don't really have to use the clutch since the revs are matched up so nicely.

Am I crazy?
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