Torque reduction shifting into 2nd

4.2 V8 32v Naturally Aspirated - 414 bhp
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fredjudd
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Torque reduction shifting into 2nd

Post by fredjudd » Mon Sep 01, 2014 5:13 pm

Before you read on this is not the torque limit applied via the throttle in 1st-3rd gears,

Evening chaps,

Recently I have been getting a torque reduction when shifting into 2nd. I can pull away normally, go full throttle in 1st then shift to 2nd and floor it again and I get about half a second of "dullness" before the engine springs back to lift. This has happened to be twice, once I shifted at 8k and the other was 6k, no ESP/TC light active on the dash.

Awaiting a friend to come and do some VAGCom logging, but anyone else had this issue?
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rob-s
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Re: Torque reduction shifting into 2nd

Post by rob-s » Mon Sep 01, 2014 5:40 pm

Have you experienced the same with Traction Control (1xESP button) off?
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jaysrs4
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Re: Torque reduction shifting into 2nd

Post by jaysrs4 » Mon Sep 01, 2014 6:37 pm

You need to turn ESP off, then it won't do it.
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PetrolDave
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Re: Torque reduction shifting into 2nd

Post by PetrolDave » Mon Sep 01, 2014 6:47 pm

jaysrs4 wrote:You need to turn ESP off, then it won't do it.
+1
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rwilsonrs4
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Re: Torque reduction shifting into 2nd

Post by rwilsonrs4 » Mon Sep 01, 2014 7:35 pm

yip+1
i get it more often as mine is charged ,damned annoying sometimes :-)
Phantom black saloon ,PES M112 Supercharged 520ps/595nm K&N filter, 100 cell milltek cats,res valved milltek system. 8 and 10mm H&R spacers.H&R roll bars, "smoke chrome " alloy refurb. JHM Quickshifter, Bilstein B16 coilovers , uprated diff mount ,50/50 devils own WM kit so 1.4 litres/min in intake approx 10% more power and torque
1/4 mile 12.01 secs 123.5mph

fredjudd
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Re: Torque reduction shifting into 2nd

Post by fredjudd » Tue Sep 02, 2014 7:53 am

Thanks for the replies chaps, I didn't think to turn that off because there was no indication on the dash that it was interfering! Shall test it later.
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MikeFish
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Re: Torque reduction shifting into 2nd

Post by MikeFish » Tue Sep 02, 2014 8:09 am

The light doesn't always come especially if it is only a quick one.

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MikeFish
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Re: Torque reduction shifting into 2nd

Post by MikeFish » Tue Sep 02, 2014 8:11 am

If it's happening in the dry on a straight then you need new / better tyres.

Wavey Dynamicist
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Re: Torque reduction shifting into 2nd

Post by Wavey Dynamicist » Wed Sep 03, 2014 10:29 pm

MikeFish wrote:If it's happening in the dry on a straight then you need new / better tyres.

Mine does it occasionally on dry and straight on hard changes and i have new Michelin Pilot Super Sports.. I don't think it's actually triggered by a loss of traction.. Something to do with the speed of throttle re-application and timing of the clutch i'm guessing, a pre-emptive thing.. Not sure why as it doesn't seem much use to be honest..

Quite a crude ESP system in general it feels in my opinion
2007 RS4 Saloon; Mugello Blue

adsgreen
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Re: Torque reduction shifting into 2nd

Post by adsgreen » Thu Sep 04, 2014 8:02 am

It's better to prevent loss of traction than deal with it after it's already happening.

It's not crude at all - you have the eps fully on why would you want to unbalance and potentially upset the car.

Now... Mashing the throttle after a gear change... That's crude.

Wavey Dynamicist
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Re: Torque reduction shifting into 2nd

Post by Wavey Dynamicist » Thu Sep 04, 2014 1:52 pm

adsgreen wrote:It's better to prevent loss of traction than deal with it after it's already happening.

It's not crude at all - you have the eps fully on why would you want to unbalance and potentially upset the car.

Now... Mashing the throttle after a gear change... That's crude.
We're not talking about mashing the throttle after a gear change.. We're talking making a swift full throttle change from 1st to 2nd.. Nothing crude there..

Besides this is a four wheel drive car.. How much loss of traction are you likely to experience with zero or small steering angle?
Disable ESP and tell me if you see any loss of traction in the same scenario that the system cuts power with ESP fully enabled.. I never have..
Not to mention i've had it come in occasionally from 2nd to 3rd!

You may argue that the dynamics team did this in anticipation of wet driving.. To me having this feature active all the time is crude..

It is a crude system compared to current generation cars, but this is to be expected.. It wasn't so much a criticism but a statement.
2007 RS4 Saloon; Mugello Blue

fredjudd
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Re: Torque reduction shifting into 2nd

Post by fredjudd » Thu Sep 04, 2014 3:25 pm

You mean you boys lift the throttle when shifting?!
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JoeyManhattan
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Re: Torque reduction shifting into 2nd

Post by JoeyManhattan » Thu Sep 04, 2014 5:35 pm

fredjudd wrote:You mean you boys lift the throttle when shifting?!
I was surprised at that also, I always leave it to the floor...
2008 RS4, Mugello Blue Pearl, Silver Interior

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