BiTDI

[EvilPostIt]

I have been taking it steady for the most part. It's surprising how relaxing it is actually, quite an effortless enjoyable ride. Glad I didn't go for the sports suspension though, the s-line suspension is just right and contrary to some opinions I quite like the non led air con temp dials.

[casto]

Update..I now use the paddles for overtaking quicker. I think there should be a TCU upgrade for the gearbox soon. Anyone heard anything? Or what you think about the Sprint Booster? Would that work?

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[razor77]

Hi Guys

Best ‘take off’ appears to be in Comfort………..once slip has gone it flies but it is that slip lag that bothers me.

DBLincoln

Are you suggesting the gearbox is slipping? The performance upgrade sounds great, but concerning if it can cause problems.

[Steve Wagstaff]

Has any Bi-TDI owner seen any news/rumours on whether Audi are going to release a software upgrade for the gearbox to cure the 2nd to 1st jearky downchange and the kick-down responsiveness? Thanks Steve

[jbanfie]

Hi Steve, the short answer is no, and sadly, I think the long answer is no and never.

I ran this whole issue up the flag pole a couple of months ago and got stumped by the 'type approval' statement, and was told to change the configuration of the car would require a re-type approval process which presumably costs quite a bit so they won't do it.

Get yourself to Holland spend the 1250 Euros and love your car again.

But in all seriousness, I now run in sport mode whenever I'm 'driving' or going to overtake when the road allows, this picks the revs up quite a bit, I then downshift one or two gears on the paddles as the opportunity arises and boot it, this tends to avoid stupid kick downs as you've done the work already.

Be happy Bi-Turbo owners, be happy!

[ukgroucho]

My Allroad is just a few weeks old and still has the 'awkward' 2nd into 1st change (i.e. MY 2014 builds behave the same). You only really notice it when you turn into a side road and have to slow to a near halt... a rolling downshift, coming to a halt at intersections it is not evident.

I'm completely with jbanfie on sports mode / paddles for 'spirited' driving - and this was also the case with my old C6 3.0 TDi. If you know you're pressing on then dynamic / sports mode is best with occasional use of the paddles. If you happen to be in Auto / comfort (or eco, although I can only see me using that on a motorway haul in winter) then use paddles to set up an overtake as it will prevent any auto gear shifts. Obviously if you're sitting for a while waiting for a gap just knock the box into manual to prevent it from 'reverting'.

I can 'live' with that - in fact i consider it part of getting the best out of the machine (aka "driving" )

[jbanfie]

And to be fair, as Steve noted in the other thread, I too can get 50mpg when I take it real easy - my conclusions are that you can't have your cake and eat it with Diesel cars, but this one gets pretty close and as we have all concluded you can easily live with the small compromises.

The kick down could be better though - bah humbug!

[ukgroucho]

EvilPostIt said "It's surprising how relaxing it is actually, quite an effortless enjoyable ride."

Funny, exactly the comment that my wife made and I was trundling along using the torque below 2000 RPM... "it seems very effortless"

[Steve Wagstaff]

my wife and daughter both say ".....this car SCARES ME...(whilst holding the side of the seat)." generally when I've kicked it down a couple of gears manually and in the sweet-spot of 2000 revs plus for an 'express' join to the motorway :-) - but YES I can compromise too BUT would like Audi to fix-it just to make it a perfect all-round car...(I swapped a Merc SL for this car...)

[razor77]

I was really interested in DBlincoln's remapping experience and some of the other discussion on the ZF HP8 gearbox in the A6 BiTdi derivatives (I'm on the brink of ordering an Allroad BiTdi - test drive on Monday). Anyway I started digging around and found a wiki article on teh engine and it got me wondering which specific HP8 gearbox does the BiTdi use. The wiki article (ZF 8HP transmission - Wikipedia, the free encyclopedia) claims the following
List of ZF 8HP variants

name	max. gasoline torque (N·m)	max. diesel torque (N·m)	examples
8HP30	300	300	-
8HP45	450	500	BMW 1 Series (F20), BMW 5 Series (F10)
8HP55	550	550	Audi A4 (B8), Audi A6 (C7)
8HP70	700	700	BMW 7 Series (F01), BMW X5 (E70), Range Rover Sport (2012)
8HP90	900	1000	Rolls-Royce Ghost,[21] Bentley Mulsanne

Transmissions in blue are used by Chrysler.

So the A6 (I assume BiTdi) has the 8HP55 - which is rated for 550N-m in a diesel ... seems odd given that the engine produces a max of 650 N-m. Makes me wonder if remapping the engine is a wise thing to do ..

Anyone got any comments?

Did you ever get any answers on this?!