APR software + B8 multitronic tranny a problem?

[BettaJetta]

Hello, I recently went to APR Germany for stage 1 but they would not flash my ecu. APR Germany states that the 2.0tfsi with the 8 speed multitronic will have problems. He stated the tq was too high for this tranny. When I look at the APR webpage they don't mention this anywhere. Anyone have some input regarding this combo?

[Stubek]

Nope, not at all. I have a friend with a B8 sedan running APR stage 2, FMIC, Intake, HFC, exhaust, and a few other things. He has been putting out 330 lbft of torque and 260 HP to the wheels for 50,000 miles.
That transmission is the same one as the A6 with the 3.0T which is the same engine as the S4. So, not sure what they are talking about.

I've also seen a stage III full turbo upgrade B8 sedan in the US and that still had the stock transmission.

[BettaJetta]

Thanks for the info but I am pretty sure its not the same tranny. An S-line and 3.0T should have DSG tranny and the normal Auto tranny is multitronic.

[Stubek]

Thanks for the info but I am pretty sure its not the same tranny. An S-line and 3.0T should have DSG tranny and the normal Auto tranny is multitronic.

Somewhat correct. An S4 or S5 has the 3.0T with the DSG.
An A6 with the same 3.0T detunned by roughly 20hp and 20 tq has the 8 speed Multitronic.

According to APRs website, the A6 3.0T stage 1 tune gets 365 Hp and 354 TQ.

Also, they show that the 2.0T with Stage 2 is 337 TQ at the wheels and 366 TQ at the crank. That is the exact set up you have, 2.0T and 8 speed. That is on the APR website, so not sure why an APR dealer would say APR can't do it.
Maybe find a different dealer in Germany.

[dscline]

Wait, I'm confused. The multitronic is the CVT transmission, which I didn't think came with the 3.0T. I didn't think the CVT could take that much power.

[Stubek]

Wait, I'm confused. The multitronic is the CVT transmission, which I didn't think came with the 3.0T.

Then tiptronic, what ever the 8 speed is.

I normally have an A4 Avant, but it is at the dealer and I have the A6 3.0T with 8 speed as a loaner. Also, looking at the Audi USA website, it says tiptronic, my bad.

[dscline]

Yeah, the Multitronic isn't really an 8sp, it just has 8 pre-set ratios you can select in manual mode. From what I've read, that tranny can't handle much torque. The 8sp Tiptronic, however, is supposedly fairly stout. The one in the A4 is rated at a little more torque than the previous 6sp. There are versions of the same 8sp Tip that are rated for even more power.

[Stubek]

Yeah, now I see the confusion. The multitronic can NOT handle the stage 1 tune.
OP, sorry, I was thinking you have the tiptronic. Do you have quattro or FWD?

If you have quattro, then you are making the same mistake I was and you have tiptronic 8 speed.
If you are front wheel drive, then you have the multitronic and the tune won't be good for you.

[A4 Centaur]

The CVT can't handle the extra power. Sad gearbox.

[k909068]

sad tranny x2, the Multitronic tranny has had bad reputation since the gen.1 on A4 B6. fragile as always, what a tragedy.

[BettaJetta]

Thanks folks. As of now, my car has the original software but I had the limiter raised. This is what she did on the autobahn yesterday.

[junchen]

sad tranny x2, the Multitronic tranny has had bad reputation since the gen.1 on A4 B6. fragile as always, what a tragedy.

Actually multitronic on b8 is different from that in b7 and b6 (when it's first launched). The ones in b8 have 8 plated clutches, compared to the earlier 7 plated clutches. I also don't see much documented multitronic failures for b8 over here or other forums.

That said, Apr has stage 1 tune for 1.8 multitronic (approx 360nm tq) but I guess the 2.0 tune would exceed the multitronic's tq limit of 400 nm. The 8spd automatic is definitely better from a tuning pov.

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[B8on19s]

The B8 multitronics (read CVT) is definately more reliable and robust than the B7 and B6's. I am running Revo Stg1 and I must say that even in S mode (where the gear 'changes' are simulated), the actual change is even smoother. I am/was hesitant to go Stg 2 as I have read somewhere that the B8 CVT tranny is safe up to only around 400nm of torque, and Stg 2 will certainly take the torque beyond that threshold. I have had discussions with a few members here with a (B8) CVT tranny on STG 2 without any issues. Also haven't heard (even from my dealer) of B8 CVT tranny failures/issues.

That said, when running any tune on a CVT tranny, its prolly not advisable to do hard launches (like u can on a quattro), but rather roll off the torque benefit of the tune during motion.

Something interesting I have noticed on the pics above, your redline is at around 7000 rpms. Mine (CVT) is at 6000rpms and will 'change' gear at 6000rps even in manual or Sport mode. Also, whats interesting is that even at 246km/h, you are almost at 6000rpms in'D'. With the CVT gearing on my car, at 6000rpms, the car would theoretically be at over 350km/h in 'D'. At our legal limit (120km/h or 75m/h) my car is at 1900rpms only in 'D'...

[BettaJetta]

I never thought about looking at the gear change rpm's.

But as you stated, I have heard people say the CVT can't hold much power. So I contacted my friend/tuner and he said pretty much the same. Tune but not to the max power. He stated that he can tune my ecu to about 40nm tq more and it should be safe. I'm not and ''off the line racer''. I only want a little more for the autobahn.

Thanks everyone......btw I was in Ingolstadt today!