I need some input from the experts here. During WOT in 4th gear, I am experiencing what seems like wheel hop (axle tramp) as I accelerate. The wheel hop is not as pronounced like what you experience during a hard stand still launch. It is very suttle, yet it is there. It does it about 3 times during acceleration and goes away. The overboost was engaged, with PSM on. Approximate starting speed was around 75 mph. The traction control light flickers for a split second and then goes away. I tried this with PSM off and it doesn't do it anymore. What is my car doing here?

 

I have exactly the same mods as you and have the same sensation when the PSM is turned on.
I don't think I can do it in 4th though -- could be your 20" wheels having trouble hooking up with asphalt while trying to negotiate wheel spin with the traction control system.

 

It could be you're making too much horse.

Or because you're on 20's it could a mismatch between front and rear diff's throwing the PSM system off.

 

The PSM is sensing that the car is breaking traction and reighning it in. That is why you do not feel it with PSM off.

 

<TABLE class=tborder style="BORDER-TOP-WIDTH: 0px" cellSpacing=1 cellPadding=6 width="100%" align=center border=0><TBODY><TR><TD class=thead colSpan=2>Yesterday 06:53 PM</TD></TR><TR title="Post 2786716" vAlign=top><TD class=alt2 align=middle width=125>AlexM</TD><TD class=alt1>I have exactly the same mods as you and have the same sensation when the PSM is turned on.
I don't think I can do it in 4th though -- could be your 20" wheels having trouble hooking up with asphalt while trying to negotiate wheel spin with the traction control system.


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Cool. I guess nothing to worry about then...


<TABLE class=tborder style="BORDER-TOP-WIDTH: 0px" cellSpacing=1 cellPadding=6 width="100%" align=center border=0><TBODY><TR><TD class=thead colSpan=2>Today 12:58 AM</TD></TR><TR title="Post 2787034" vAlign=top><TD class=alt2 align=middle width=125>ruf_turbo</TD><TD class=alt1>It could be you're making too much horse.

Or because you're on 20's it could a mismatch between front and rear diff's throwing the PSM system off.

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I highly doubt it's because I'm making too many horses.. Many cars out there making way more than my car is..

 

sounds like a seriously annoying problem, time for someone who knows the stock ecu to do some modding