tom_993

[quote]Originally posted by oleg steciw:
<strong>Good Thread

Now here's a different question: When blipping the throttle while downshifting, do you:
1. Depress clutch / blip / downshift / release clutch
or
2. Depress clutch / downshift / blip / release clutch

I do #1 more often, but #2 makes matching rpm's easier, therefore I'm migrating to style #2 more.

Hope I explained this clearly </strong><hr></blockquote>

Number 2, because as you mention, it makes matching revs easier. If you do number 1, the revs drop as you are downshifting, so they no longer match.

Greg Fishman

[quote]Originally posted by tom_993:
<strong>

Number 2, because as you mention, it makes matching revs easier. If you do number 1, the revs drop as you are downshifting, so they no longer match.</strong><hr></blockquote>


I do this but the downshift/blip is almost simultaneous. I don't wait until the lower gear is fully engaged before blipping. I want the clutch released right as I engage the lower gear with the engine at the right rpm (hopefully).

os993

Thanks Gents, great feedback!

Flying Finn

[quote]Originally posted by Greg Fishman:
<strong>
I do this but the downshift/blip is almost simultaneous. I don't wait until the lower gear if fully engaged before blipping. I want the clutch released right as I engage the lower gear.</strong><hr></blockquote>

I do the same thing, it all pretty much happens at the same time.

Robert Henriksen

[quote]Originally posted by Flying Finn:
<strong>

I do the same thing, it all pretty much happens at the same time.</strong><hr></blockquote>

"Ain't got no RHYthm..." All together, now! Ah'm a whaat boy, Ain't got no RHYthm...

Flying Finn

[quote]Originally posted by Robert Henriksen:
<strong>"Ain't got no RHYthm..." All together, now! Ah'm a whaat boy, Ain't got no RHYthm...</strong><hr></blockquote>

Oh sure you do, and besides, who said white men can't jump?!

hn

My question is why, in single clutching, blip when the clutch is depressed and in double clutching, blip when the clutch is NOT depressed?

THx

E. J. - 993 Alumni

[quote]Originally posted by Greg Fishman:
<strong>I do this but the downshift/blip is almost simultaneous. I don't wait until the lower gear is fully engaged before blipping. I want the clutch released right as I engage the lower gear with the engine at the right rpm (hopefully).</strong><hr></blockquote>

I think I agree with Greg here but I cant read his racerboyspeak. I will say this though - when at the track and going pretty hard, I don't know which of Oleg's methods I use because it all happens so fast. It is just one motion for me.


Clutchinstartmovingthegearleverblipthethrottleatthesametimeandclutchout.

Hope that cleared it up now...

E. J.

Robert Henriksen

[quote]Originally posted by E. J.:
<strong>Clutchinstartmovingthegearleverblipthethrottleatthesametimeandcl utchout.</strong><hr></blockquote>

Hey! You been watching me shift? Sneaky boy...

tom_993

[quote]Originally posted by hn:
<strong>My question is why, in single clutching, blip when the clutch is depressed and in double clutching, blip when the clutch is NOT depressed?

THx</strong><hr></blockquote>

You are correct. Look at the picture on this page, from <a href="http://www.howstuffworks.com/transmission2.htm" target="_blank">how things work</a>. When single clutching (heel/toe), you are trying to get the main shaft (From Engine) up to speed, to match the output shaft (To Differential) . The gears (blue in the picture) will take care of themselves, due to the syncromesh. When double clutching a tranny without syncro’s, you’re trying to get the gears themselves up to speed.

SundayDriver

[quote]Originally posted by Greg Fishman:
<strong>

For guys like Mike and DJ that have raced Formula Fords and such, double clutching is/was a requirement. It is probably very hard to break themselves of that habit, and most likely they are just as fast as most single clutching guys.

Greg</strong><hr></blockquote>

Clutch - We dunt need no steenkin clutch. Most of the FF guys I know (and when I drive most Formula cars, especailly sequential) don't use the clutch either for upshift or downshift.

E. J. - 993 Alumni

[quote]Originally posted by Mark D - TT Alumni:
<strong>

Clutch - We dunt need no steenkin clutch. Most of the FF guys I know (and when I drive most Formula cars, especailly sequential) don't use the clutch either for upshift or downshift.</strong><hr></blockquote>

How about the new car Mark? Sequential or not?

E. J.

hn

Thx Tom,

Now i know what Syncro is. I have been practicing correctly (single/double clutching) but never understood why.

SundayDriver

[quote]Originally posted by E. J.:
<strong>

How about the new car Mark? Sequential or not?

E. J.</strong><hr></blockquote>

Sequential (motorcycle tranny) with a shift lever. My plan is to try to convert to paddle shift - either cable actuated or a button actuated air driven (full electric is not allowed under SCCA rules).

Edward

Yes, double clutching is unnecessary in modern cars. That said, I have done it for so long in an ALFA that it just became second nature in the 993. I don't think it slows me down any at the track....who knows. And even if it did, I'm certain it would be marginal, at most. So why do I continue to double clutch? It really does save wear on the syncros since it matches input shaft/output shaft speeds which simply "blipping" the throttle does NOT do. Who knows what the actual "savings" is in wear and milage on the tranny, but anything that delays major-component wear is ok by me! When you get it right, the only thing you notice is how the shift lever just "melts" into the next gear as if sucked in. Yet another grin factor !!! <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />

Edward