[Diy_efi] Traction control strategy (solution offered)

[Crescent Kao]

Pulling timing would work, however the engine management system is not gear
based. The rev limiting function doesn't "switch" so to speak. When we
launch, we hold down a momentary push button which holds the rpm at a lower
limit. We can then hold the gas at full throttle. When we launch, we
instantly let go of the push button which instanatenously switches the the
rev limit to the redline RPM. It all happens behind the scenes, you see,
feel or hear anything different. Just the lower rpm limit is instantly gone.


Crescent Kao
Director of Marketing and Sales
www.c-speedracing.com



-----Original Message-----
From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
Behalf Of bill.shurvinton at nokia.com
Sent: Tuesday, April 30, 2002 2:33 AM
To: Diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Traction control strategy (solution offered)


Hmmmm. symptoms are outside my ability to diagnose, as I'm no drag racer,
but if your ECU allows per gear settings a bit of retard at 7500 in first
should pull that back in, although (and again please excuse my lack of
experience in this area) does it break loose when the limiter switches
between the 2 settings.

Bill

-----Original Message-----
From: ext Crescent Kao [mailto:crescent at c-speedracing.com]
Sent: Tuesday, April 30, 2002 10:21 AM
To: Diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Traction control strategy (solution offered)


We already do. We use a 2 step rev limiter for the launch. We currently
launch at 6000rpms. It shoots out the hole very strong.. then at around
7500-8000 rpms, it breaks loose just for a split second where some throttle
manipulation is required. First shift is at 9k.. 2nd gear pulls strong with
no wheel spin, subsequent shifts are at 8k.

Works well. 1.80-1.90 60ft times.. but consistent low 1.80 or 1.70's would
be ideal.

Crescent Kao
Director of Marketing and Sales
www.c-speedracing.com



-----Original Message-----
From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
Behalf Of bill.shurvinton at nokia.com
Sent: Tuesday, April 30, 2002 2:14 AM
To: Diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Traction control strategy (solution offered)


I would say that you need launch control rather than traction control for
this,

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