Lee551247 Posted November 20, 2008 Report Share Posted November 20, 2008 I am going to put my S3 on a rolling road on saturday, are there any fuses that should be removed to diable the traction control or the haldex? Or do you just turn the traction control off and it stays off?? Any help would be much appreciated. Link to comment Share on other sites More sharing options...
Scotty Posted November 20, 2008 Report Share Posted November 20, 2008 It depends it it's a 4 wheel dyno or a 2 wheel dyno. Then it depends on who you believe. Then it depends on whether you're happy to accept any risks. Basically it depends. I hope that helps!! I didn't think you could disable traction control. Isn't it only ESP? To explain, a little on the haldex thing : Some people maintain running on a 2wd dyno can shag the haldex as it's not designed to have the front and rear shafts at such differing speeds. Others say it doesn't matter On a 4wd dyno the haldex keeps topping up the rotation of the rears as it detects them slowing this gives lumpy graphs. Some dynos are better than others at coping with this apparently. You then get the fact that power is being put through the haldex which on a normal straight road it wouldn't be. Therefore the losses are different to when it's normally running in fwd mode and hence the figures you get could be different. With all the above there are different views and opinions and it's been going on like this for at least 7 or 8 years. It's a lot simply with "proper" quattro (ducks and hides) Link to comment Share on other sites More sharing options...
Mook Posted November 20, 2008 Report Share Posted November 20, 2008 The traction control doesn't control the distribution of torque to the rear diff - this is handled by the Haldex system. Do NOT put your S3 on a 2WD rolling road. Yes, technically you can disconnect the Haldex controller (which, in very simple terms controls the switch that engages the clutch to the rear diff). Two people I know have had problems with their rear diff after they've run their R32s up on a rolling road (the S3 uses exactly the same 4WD system as the R32). If you're having it run up on a rolling road, only use a 4WD one. Link to comment Share on other sites More sharing options...
Lee551247 Posted November 20, 2008 Author Report Share Posted November 20, 2008 Thanks for the advice, The rolling road is a 4wd road, am i not likely to see the true readings then as the haldex will prevent the car from giving a true BHP and Torque readings?? Link to comment Share on other sites More sharing options...
Mook Posted November 20, 2008 Report Share Posted November 20, 2008 No, that's not the case. A properly configured 4WD RR will give you a proper torque reading at the wheels, whether a 2WD or 4WD car is used on it (BHP is calculated from torque and engine speed). The run-down is then used to calculate the loss through the drive-train, so they can work out the flywheel BHP. Link to comment Share on other sites More sharing options...
Lee551247 Posted November 20, 2008 Author Report Share Posted November 20, 2008 Cool, Thanks for your help Mook. Link to comment Share on other sites More sharing options...
Mook Posted November 20, 2008 Report Share Posted November 20, 2008 No worries Link to comment Share on other sites More sharing options...
Jamiekip Posted November 21, 2008 Report Share Posted November 21, 2008 I've run mine on two different rollers. Regal Autosports 4WD Mustang Dyno - 313bhp & 305lb/ft Prosports Bosche 4WD Dyno - 314bhp and 310lb/ft Graphs were pretty smooth and results consistent. As Mook says, so long as the Dyno operator is familier with Haldex and sets the road up correctly you should see pretty accurate results. Have fun! Link to comment Share on other sites More sharing options...
geo_nr1 Posted November 21, 2008 Report Share Posted November 21, 2008 Jamiekip, I assume your S3 is remaped? Link to comment Share on other sites More sharing options...
Decked Posted November 21, 2008 Report Share Posted November 21, 2008 Jamiekip, I assume your S3 is remaped? He has the GIAC Hammer remap IIRC. Link to comment Share on other sites More sharing options...
Lee551247 Posted November 21, 2008 Author Report Share Posted November 21, 2008 Jamiekip, I assume your S3 is remaped? Yeah im running the Revo software! Link to comment Share on other sites More sharing options...
Jamiekip Posted November 22, 2008 Report Share Posted November 22, 2008 Jamiekip, I assume your S3 is remaped? Yeah, as Decked said, I've had the GIAC hammer map on my car for some time now and really pleased with it. Getting the EVOMs CAI fitted in a few weeks and the Exhaust done soon, possibly a Milltek with custom tips given the conversations I've had recently. You canread more about my car here: jamiekip's write up J Link to comment Share on other sites More sharing options...
1animal1 Posted November 23, 2008 Report Share Posted November 23, 2008 This may be of some use http://www.r32oc.com/HALDEX.pdf There was also a forum member who contacted Haldex about running their car on a 2wd RR... Haldex basically said unless you disconnect the driveshafts, the car should NOT be run above 30mph ish with fuse removed.... also have a mate who took his to a 4wd RR, they did two runs, 1x4wd and 1x2wd without his consent...his car has never felt the same since Link to comment Share on other sites More sharing options...
Mook Posted November 23, 2008 Report Share Posted November 23, 2008 Hence the comments above about not running an Haldex based 4WD car on a 2 wheel RR Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now