Please explain dropping, feathering, and slipping the clutch - Subaru WRX Forum
 
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post #1 of 13 Old 09-18-2004, 04:55 PM Thread Starter
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Please explain dropping, feathering, and slipping the clutch

Ok, this is really embarrassing but I just learned how to drive a standard about 9-10 months ago on my newly purchased '02 WRX. Unfortunately I had to teach myself how to drive the standard with little input from anyone with any experience. Day to day normal driving is going great, but I honestly have no idea how to launch my WRX properly. I've searched the threads on this subject so I have a good idea how to launch. My problem is I have no idea what you guys mean by dropping, feathering, or slipping the clutch. Can someone explain these terms to me? The general opinion seems to be rev to around 4000-5000 rpm, then slip the clutch (don't drop because of the WRX's weak tranny). Explain what slipping the clutch means in a way that someone like me might understand. If you can explain the whole launching process again in more simplified terms that would be even better. Thanks for helping out!
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post #2 of 13 Old 09-18-2004, 09:30 PM
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i dont drop because of bog, your not trying hard enough to go fast unless your breaking something while doing it. but you just let the clutch slip (dont let it grab or catch) enough till the car rolls a bit and then let out slowly. boost will come in faster that way as i noticed so you will accelerate better. i only do it at 3 or 3.5 so not to burn easily and i still have good results.
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post #3 of 13 Old 09-18-2004, 11:47 PM
 
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Drop means let up on the clutch all at once. Worst for tranny, best for launch times. Feather dumping is dumping but a little bit slower, which is ok for tranny, but good for times. Slipping is letting the clutch up even slower than feather dump which is best for tranny, but worst for times. Rev to 5 k then let up clutch slowly.
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post #4 of 13 Old 09-19-2004, 07:46 AM
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But don't let the clutch out to slowly at a high RPM or you will burn the clutch up. Trust me, you will know the smell of a burning clutch and it will stick around for a while. I taught myself how to drive manual in my car and it took me a while. As far as learning to launch your car, you just have to go out, practice and eventually you will teach yourself. My method is rev to around 3.5k - 4.5k then take about 1 second to let the clutch out.
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post #5 of 13 Old 09-19-2004, 06:45 PM
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What about the STI tranny? Will it handle abuse as far as dropping the clutch goes?
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post #6 of 13 Old 09-20-2004, 10:13 AM
 
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Yeah I have not heard of any STi transmissions breaking. The clutch won't last though if you slip it alot.
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post #7 of 13 Old 09-30-2004, 09:40 AM
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Quote:
Originally Posted by WRXtreme
you will know the smell of a burning clutch
and what a horrible smell it was ...
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post #8 of 13 Old 09-30-2004, 11:08 AM
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heh, my wife can catch me by the smell of my poor clutch... She is all like... hey I told you no street racing and you come home with a smokey clutch...

I have gotten better at not sacrificing my clutch to save my tranny, but seriously a clutch is MUCH cheaper than a transmission, so I would say if you have to pick one, treat your clutch worse.

but don't listen to me, my 0-60 foot time is still 2.2s (I am too careful me-thinks)

I think when I get a new dogbox (we are talking years from now) I would love to take my WRX to the track and launch the hell out of it and see just how easy it is to turn gears into confetti.

next test and tune night I plan on launching from 2000 RPM and see what I can do, I think it may actually be better since I can boost a lot sooner.

has anyone tried using the emergency brake and letting boost build with the clutch mostly up? I think that would be easy on transmission, but hard on the clutch and e-brake, not something to do every day, but when that modded mustang gt keeps beating you, maybe it is time to pull out the big guns.
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post #9 of 13 Old 09-30-2004, 04:44 PM
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With 2.2 60ft times you should definatly be launching at a high rpm. You should be able to launch 4k-5k(instead of 2k) letting the clutch out fairly quickly without causing any damage. If you do that you should be sub 2.0 easily.

As for having the e-brake pulled and clutch partially engaged, there should be no reason for that. You can let the boost build with the clutch in and e-brake disengaged. That is why drag strips are flat Plus if the car starts to drag the back tires locked up i don't want to even think about what kind of damage that would cause. Bad idea IMO.
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post #10 of 13 Old 09-30-2004, 06:40 PM
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Quote:
Originally Posted by Rain_Racer
"hey I told you no street racing and you come home with a smokey clutch....
LOL, i haven't heard that one yet, but i'll laugh when i do. Funny this is, something always gotta give ... you just gotta decide what: Clutch or wheels. Something got to spin.
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post #11 of 13 Old 09-30-2004, 08:40 PM
 
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I don't think the WRX builds boost when not in gear. That is some of the point of launch control I think.
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post #12 of 13 Old 10-12-2004, 04:39 PM
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i have smelld the smoky clutch on a sti hehe, test drive last week.... the sales guy was like "i think its broke in now" hehe
but he told me to let it rip
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post #13 of 13 Old 10-13-2004, 12:57 AM
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yeah i really hate the smell of a clutch, ill do what it takes to not get that nasty smell. did it with a friend and my girl in the car in a field, they were gaggin even after i warned them
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