While I appreciate the scientific method of determining the ultimate launch
technique for the fastest launch, there is a point of diminishing returns.
While we don't have any hard data, we have tried everything from slow
controlled clutch slip, to dropping the clutch at around 6000, and we found
that all that dropping the clutch at high RPM does is stress the car ;-).
Are technique is combination of high revs and a controlled release that is
quick enough so as to not spin the clutch. The results are determined by
just watching the car vs the other guy, and with this technique, we are
rarely beat to the first element on the course. A well driven Talon
generally is a tick in front of us at the first element, but it has superior
weight to torque/hp figures, so I expect it to be faster off the line
regardless. I have no plans to change my launch techniques.
---JCG
Team Butt Heat
GS Audi A4 Quattro
> -----Original Message-----
> From: dg50@daimlerchrysler.com [mailto:dg50@daimlerchrysler.com]
> Sent: Tuesday, January 26, 1999 6:17 AM
> To: Phil Ethier
> Cc: joe goeke; autox@autox.team.net
> Subject: Re: Turbo DSM vs. AWD in G Stock
>
>
>
>
>
> > From: joe goeke <joe_goeke@hotmail.com>
>
>
> >> We've found the A4 clutch to be quite durable. We
> normally don't >> smell
> anything ;-) as long as we launch correctly to not overpower
> >> or "spin" it on
> Pro launches.
>
> > My Quantum Syncro has 120,000 miles on it. My parts car
> has 246,000 > miles
> on it. Near as I can tell, they each have the factory
> clutch. > Guess those
> Audi guys like to build tough clutches.
>
> ...or maybe you're not launching hard enough.
>
> I'm not trying to be snippy, I'm just woundering if any of
> the Audi Quattro guys
> ever tried going to a dragstrip and using the 60' times to
> tune their launch
> technique. I had been drag racing my Talon for about a year
> before I got into
> ProSolo, so I had already scientifically determined the
> optimum launch point.
>
> On a GS AWD Talon, that optimum point is 6500 RPM and dump
> the clutch. You
> occasionally get a little wheelspin that way, but wheelspin
> at 6500 turns out to
> be faster than no wheelspin at 4500 - I have timeslips to prove it.
>
> I actually would prefer to launch at about 7500, but at 6600
> the car starts
> creeping forward, and that causes problems with rolling out
> of the lights,
> messing up reaction times, redlighting, and driver
> frustration - so 6500 it is.
>
> This year, I dunno *what* I'm going to launch at, as I'm
> running much more
> rubber under the car, and I'm afraid of snapping an axle. I
> wish I could find a
> clutch that had little to no wear, but slipped just a little
> under high load.
> "Clutch as a fuze" I've looked at carbon/ceramic clutches,
> but they grab like
> bastards. :(
>
> You should see the look you get from the cluch guys when you
> tell them you want
> a clutch that slips and lasts forever. :)
>
> Anyway, I can't help but wonder if that Audi would go faster
> if it wasn't being
> babied all the time. Drive it like ya hate it Joe! :)
>
> DG
>
>
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