ajs76

Hey guys

I'm new to this car and slightly baffled. I have on summer tires and when it is like 45 degrees and raining even if I hold down the traction control button to turn off the system...I can still mat the throttle and red line it without any nannies visually kicking in.

Is the car secretly cutting power or is the awd really that good?

Need...tune...lol

Ralcbah

You won't see an indication of lost traction on dash with TC all the way off. The AWD is good but you are likely spinning tires. If you want to spin tires further in the wet, a tune will solve that 'problem'.

PeterUbers

Now try dyno mode in the rain

ajs76

I don't get a light with tc on either. Maybe I have a handbuilt e350 motor

Ralcbah

Haha. That's funny. But seriously, no light with TC on means you're holding traction. And that's not a bad thing.

chiromikey

If he's holding traction in the wet at wot I'd think that is a bad thing because he's missing power...

Ralcbah

Guess depends on speed and rpm. Well your comment is certainly fair, but missing power from factory would be interesting....

Amg63-

if he's stock and AWD then maybe not.

if this happens with a tune then certainly there is missing power.

this is e63S or non S?

izzy63

my car is stock and it spins the rear in the rain and the TC light definitely comes on

Amg63-

are you AWD or RWD? This will obviously make the biggest difference

izzy63

AWD 15 E63s

ajs76

I'm awd but not an S (yay Canada?). Maybe that's it?

You guys are totally going to hypochondriac me into dynoing it.

raudiace4

You should definitely be spinning. My car spins the rears pretty much whenever I want it to off the line, be it on summer tires or winter tires. And if its cold and wet on summer tires it will get sideways...

ajs76

Hmmm...true but a wagon is like throwing a really fat guy over the rear axle so maybe that makes a difference?

Amg63-

This is what i was asking you in an earlier post, if your an S or not.

Your a wagon with the extra weight and NOT an S model, i think this is the reason why.

With a tune you will see a HUGE difference.

Amg63-

In your case it makes sense that your spinning.

In the case of a non-s with AWD wagon its not surprising that it doesnt to me...

raudiace4

Wagon and non S or not, if OP does a 4K RPM launch with traction in sport its should spin... Especially summer tires in 45 weather.

ajs76

OH! wait wait wait...I'm sorry. I'm not launching this badboy at 4k, I'm just stomping it to the floor and being surprised that the AWD can keep up all the way to redline.

My 911 would have spun the tires wayyy earlier - modern systems are pretty great (as I'm assuming my car is not actually broken)

raudiace4

Even stomping it to the floor off the line without race start my car will spin lol. What kind of tires are you running lol

ajs76

Some kind of pirelli summer tires. I have to go look when I get back to town. I used them to back out of my semi steep driveway with 6" of snow just this morning. Seriously greatest awd ever and making a strong case for not bothering with all seasons or dedicated winters. I usually can avoid driving on snow days or take the wife's SUV anyway.

ajs76

I just wanted to post an update here. So I'm now Eurocharged (call it 700-800 lb feet of torque...whatever). Traction control on or off, I can STILL floor it in the rain in a straight line and not lose traction. This car is amazing (or at least these Pirelli PZeros are). When you live in Seattle and the roads are at least damp 80% of the time, I'm going to have a hard time wanting to swap to michelin PSS or PS4s etc.

jvakos

Ajs - congrats on the tune! Noticeable difference in power ??

When you test the wheel spin and traction in wet conditions are you in Sport + trans mode with traction full off (not Sport mode) and in first gear?

I have a 15 Amg S and in recent rain in Chicago when I floored it from a stop in Sport + mode and in 1st gear with traction Off it definitely spins the rears and I'm just stock with new Pzeros. Perhaps the wagon with additional weight in the rear keeps the power down?

notatroll

Welcome to TCU club. Lets get it on trolls.

ajs76

The power difference is noticeable. It went from "eh, kinda quick" to "ahhh, now it's fun" levels of power for me. those are technical speeds. I found it to be very very noticeable at all speeds.

Notatroll - unclear what you're saying exactly, but yeah, the TCU on this car is a mixture of epic for keeping the tires moving the same direction and awful for adding so much lag