04-12-2010, 05:16 PM
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#1
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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TCS - what does it restrict?
Hi guys,
curious to know what the TCS restricts when loosing traction? Talking about when both wheels spin - not the single spin system which applies brakes.
Must cut ignition, fuel, close throttle or something else, anyone know which one(s) it does?
Regards,
Sam
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04-16-2010, 02:42 PM
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#2
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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Anyone know?
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04-16-2010, 03:09 PM
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#3
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Registered User
Join Date: Apr 2010
Location: trenton nj
Posts: 449
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i can only speak for GM cars...they cut throttle to limit spin
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04-16-2010, 03:30 PM
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#4
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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I was thinking it couldn't be that on a car with a throttle cable. , but then it does have cruise control, so I guess it's possible?
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04-22-2010, 12:05 AM
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#5
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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No one knows how this works on the boxster?
Sam
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04-22-2010, 05:45 AM
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#6
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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I found some information, but I'm not sure how it relates to early cars without electronic throttle actuation. For one wheel slippage, the brakes are applied to that wheel. When both wheels slip, a combination of reduced throttle, fuel, and timing is used. One interesting tid-bit, one rear tire slip during deceleration ( trail throttle while turning, or a bad down-shift ) , PSM will add throttle to stabilize the car.
I have an "after sales training" pdf with lots of good information, but it's too large to attach here. I could send it to your personal email if you want.
Steve
Last edited by stephen wilson; 04-22-2010 at 06:07 AM.
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04-22-2010, 03:23 PM
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#7
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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Thanks - that sounds great. Will PM my email.
Sam
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04-22-2010, 03:49 PM
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#8
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Registered User
Join Date: Apr 2010
Location: trenton nj
Posts: 449
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Quote:
Originally Posted by stephen wilson
I found some information, but I'm not sure how it relates to early cars without electronic throttle actuation. For one wheel slippage, the brakes are applied to that wheel. When both wheels slip, a combination of reduced throttle, fuel, and timing is used. One interesting tid-bit, one rear tire slip during deceleration ( trail throttle while turning, or a bad down-shift ) , PSM will add throttle to stabilize the car.
I have an "after sales training" pdf with lots of good information, but it's too large to attach here. I could send it to your personal email if you want.
Steve
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EDC...GM calls it engine drag controll
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04-23-2010, 10:34 AM
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#9
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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Porsche speak: Engine Drag Torque Control
Automatic Brake Differential
Automatic Slip Regulation
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04-23-2010, 11:32 AM
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#10
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Registered User
Join Date: Apr 2010
Location: trenton nj
Posts: 449
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Quote:
Originally Posted by stephen wilson
Porsche speak: Engine Drag Torque Control
Automatic Brake Differential
Automatic Slip Regulation
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maybe off topic..but stephen can you or some one breakin to po,s ECM and make "adjustments" i,m close to road testing a NOS system but the auto tranny is the road block....i need to firm up and quicken shifts....i need full command of throttle....i need to wire in a "window" [rpm] switch... crank signal is ? i,ve got gm time but i,m a FNG on po ..tanks
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04-23-2010, 11:42 AM
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#11
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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No, I'm afraid I don't have any way to make adjustments. I'm not sure if there is any readily available method.
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04-28-2010, 11:26 AM
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#12
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Registered User
Join Date: Aug 2008
Location: DFW
Posts: 46
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The early cars use a combination of brake and cutting the ignition. I forget which it does first but if that doesnt work then it goes into second phase.
chris
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