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Question about G37's VDC compared to G35

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Old 04-30-2009, 06:15 PM
  #16  
atag012
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Originally Posted by SenSpeed
and if youre going to throw physic 101 stuff out, you mind as well example that kinetic friction resistance is lower than static friction, translating into more force being applied at the wheels, meaning better accel.
good **** lol
Old 04-30-2009, 09:50 PM
  #17  
Mike
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Originally Posted by SenSpeed
not true, best launches mean slipping your tires a bit as you launch. Do you drive an auto? Anyways, you're answering a different question.
Originally Posted by SenSpeed
and if youre going to throw physic 101 stuff out, you mind as well example that kinetic friction resistance is lower than static friction, translating into more force being applied at the wheels, meaning better accel.
Exactly... so you shouldn't be slipping the tires.

As far as launching goes, slipping your tires puts more power to the ground, than your engine makes at (very) low RPM.
Old 05-01-2009, 12:17 PM
  #18  
SenSpeed
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Originally Posted by Mike
Exactly... so you shouldn't be slipping the tires.

As far as launching goes, slipping your tires puts more power to the ground, than your engine makes at (very) low RPM.
yes in an ideal world, this is what you want. in ideal cornering, this is want you want. In stand still launch, it is a different story. When you launch, there is no feedback to how much MORE force the tires can take unless they begin to "talk" to you. If youre just holding back such that you prevent tire slippage, you wont know if youre reaching the limits of traction.

This is the difference my friend, between textbook geeks and real world workers.
Old 05-01-2009, 04:17 PM
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Mike
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You're talking to the guy that does 6000 RPM launches...

Yes, it is the fastest way to launch THAT particular car on street tires.
Old 05-01-2009, 05:08 PM
  #20  
tristan1334
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Originally Posted by Mike
You're talking to the guy that does 6000 RPM launches...

Yes, it is the fastest way to launch THAT particular car on street tires.
6k launches? or you mean doing burn-outs? There's in no way in hell you can launch any rwd/fwd at 6k and have a quick time. Atleast not on regular street tires.
Old 05-01-2009, 08:21 PM
  #21  
Mike
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Originally Posted by tristan1334
6k launches? or you mean doing burn-outs? There's in no way in hell you can launch any rwd/fwd at 6k and have a quick time. Atleast not on regular street tires.
http://videos.streetfire.net/video/S...unch_29790.htm

I rest my case.
Old 05-01-2009, 09:59 PM
  #22  
tristan1334
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Originally Posted by Mike
Last time I checked my car is a G37. DUH!!! Rest your case somewhere else buddy. Or get a honda and learn from that. Look at my sig and I have video of myself and my car to back it up.
http://www.youtube.com/watch?v=LH7D5wMOeSk
Old 05-01-2009, 10:06 PM
  #23  
Mike
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I think you missed the point.

Wheelspin is good only when spinning the wheels puts down more power to the ground than not spinning them.

In the G's case, that equilibrium point is fairly low in the RPM band.

In a Honda's case, that equilibrium point is fairly high in the RPM band.

As a drag racer, you of all people should know that there is no set RPM to launch at, as conditions are always different.
Old 05-01-2009, 10:24 PM
  #24  
tristan1334
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Originally Posted by Mike
I think you missed the point.

Wheelspin is good only when spinning the wheels puts down more power to the ground than not spinning them.

In the G's case, that equilibrium point is fairly low in the RPM band.

In a Honda's case, that equilibrium point is fairly high in the RPM band.

As a drag racer, you of all people should know that there is no set RPM to launch at, as conditions are always different.
My point is I do spin the tire enough to get a forward momentum. I'm not talking about excessive wheelspin that keeps you pinned in one spot.
You're right, the powerband on G and s2k are totally different that's why they can launch at 6k rpm. I agree that there's no set rpm to launch a G. But I got my best 60' times spinning my tires off the line.
Old 05-01-2009, 10:41 PM
  #25  
Mike
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I havn't done any extensive launch studies with the G, but my butt dyno tells me that the best launches out here were with an aggressive clutch slip at around 3000-3500RPM.

I'm not a drag expert =X

On a side note, your 60ft is great for being on street tires... most s2k's doing VTEC launches are between 1.9xx and 2.2xx, but they weigh ~800 lbs less , so I'm willing to bet your technique is superior to mine
Old 05-01-2009, 10:56 PM
  #26  
tristan1334
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Originally Posted by Mike
I havn't done any extensive launch studies with the G, but my butt dyno tells me that the best launches out here were with an aggressive clutch slip at around 3000-3500RPM.

I'm not a drag expert =X

On a side note, your 60ft is great for being on street tires... most s2k's doing VTEC launches are between 1.9xx and 2.2xx, but they weigh ~800 lbs less , so I'm willing to bet your technique is superior to mine
Technique??? Tires don't last me no more than 6 months. Factory clutch, I say...maybe a year or two. So...no technique here just time on the track. Everybody I know including are usually rusty at opening season. Btw, one of my cousin has a vortech s/c s2k. You can check his set-up in one of my vids in youtube. He had a bad launch againts a evo8. Good luck racing and keep it safe.
Old 05-04-2009, 01:48 AM
  #27  
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g37 vdc allows for a little more fun but i still leave it on unless im on a track most of the times.
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