Well, the more probable question/answer is how does the Dyno know what AFR the Engine ECU is running
The AFR under full throttle will not be 14.7, as said will be more like 12.5-13.0 (0.85-0.88 lambda thereabouts) When tuned this richens up a bit primarily for cooling, my TTRS when tuned was pegged at 0.82 lambda (0.82 x 14.7 = 12.05 AFR) Some however went crazy with the boost and had to richen up quite a bit to cool the EGT's with lambda's in the mid 0.7's. All cars will be the same.
Anyway, reference the turbos, yes, apparently APR have had a few blow on them in Germany with the older part number. (Last digit in serial number is N) This has apparently changed to last digit A but my car is a MY15 car built February 2014, delivered mid March and mine has the N digit in it also, so really not sure how much truth there is in this 'turbo re-design'. If it's a known problem then Audi should change it no questions asked, however, if we are running around with remapped ECU's with a TD1 flag showing, we will be screwed. The tuners really need to get around this ASAP, i'll not be opting for a remap until this is sorted especially if the turbos are likely to go.
Any idea what boost they were running at to cause the turbo to blow? Stock runs at 1.2bar max, so around 18psi. Shark box runs at 1.5bar max, so 22psi. I would think that to be an acceptable range of the turbo.
Probe up the exhaust back end measures lambda value. AFR is just lambda x 14.7
Anyway, reference the turbos, yes, apparently APR have had a few blow on them in Germany with the older part number. (Last digit in serial number is N) This has apparently changed to last digit A but my car is a MY15 car built February 2014, delivered mid March and mine has the N digit in it also, so really not sure how much truth there is in this 'turbo re-design'. If it's a known problem then Audi should change it no questions asked, however, if we are running around with remapped ECU's with a TD1 flag showing, we will be screwed. The tuners really need to get around this ASAP, i'll not be opting for a remap until this is sorted especially if the turbos are likely to go.
Probe up the exhaust back end measures lambda value. AFR is just lambda x 14.7
Anyone here comment on what I'm hearing about blown turbos while running tuning boxes on the S3 and MK7 GTI? I've heard it from a few people. Mainly flash tuners though haha.
From what I have been told, the first batch of S3s had a different turbo that has been revised on later builds as its internals couldn't cope with increased boost.
Basically, the AFR pre and post Shark tuning box is 14:1 (the same). The tuning box tells the ECU the boost is stock, even though it isn't, the turbo is put under excessive pressure, and kaboom.
With a 14:1 AFR, thats roughly 28 pounds of boost on stock internals. That's pretty damn high.
I'd love to hear something from Shark on this, as I'm ****ting bricks right now, and am planning on disconnecting the tuning box.
The turbo is an IHI unit, *loosely* based on an existing RHF4 Turbo (so read the compressor maps with caution).
I've not heard any suggestion of a turbo change between early cars, and later cars.
However, at least 2 members on this forum have had to have replacement turbos, but I don't think either of them had tuning boxes.
Also, I don't really understand that info re: 14:1 AFR.
Stoichiometric burn is 14.7:1, so you would expect this at cruise. However for max power/acceleration this decreases to approx 12.5:1 so it is never a constant ratio throughout the engine map. I think there is some jumbled up mis-information circulating t'internet.
The tuning box tells the ECU the boost is stock, even though it isn't, the turbo is put under excessive pressure, and kaboom.
With a 14:1 AFR, thats roughly 28 pounds of boost on stock internals. That's pretty damn high.
I'd love to hear something from Shark on this, as I'm ****ting bricks right now, and am planning on disconnecting the tuning box.
my car is a MY15 car built February 2014, delivered mid March
Why not? And its not ambitious either, those times will have be been done using a racelogic box at what looks like brunters.
This sounds quite ambitious, surely it can't be right?!
https://www.youtube.com/watch?v=PsMwbwspLKk&feature=youtu.be
Also Pro Alloy are looking for an S3 to develop there intercooler, there based down south so that rules me out if theres any takers? Just send them an email or give them a bell Pro Alloy Motorsport - Specialist alloy components - Contact Us
Just found this:
20% discount off Revo maps until 09/08/14
So if the S3 map is £499 when it gets released, you could get it at a discounted price of £399.
Add an SPS box for £120 and you can change it back to stock, 3 performance modes, valet mode (restricts boost and limits rpm to 3000) and also has an anti-theft setting (allows the engine to start but throttle is disabled).
Also, if/when you want to go up to Stage 2, the new map will only cost £50.
- so long as they make it undetectable).
We deal with a remapper in Belgium and the latest TDis have recently been cracked.. The Ecu has to be removed and flashed and the dealer will see a TD1 code unless the Ecu is reflashed back to standard (this cane be done remotely it has to go back to source) I'd imagine the latest TFSI tuning options are going to be of a similar vein too ..
As for the ''couple of weeks'' thing, how long have we been hearing that line? I'll be surprised if we have anything in a couple of months.