VAG COM engine data log

[neckarsulm]

Hi,

Below is a link to a data log from my new RS4.

http://www.volkswizard.co.uk/images/car ... NSEP10.xls

It seems standard as its running 2 bar boost but the MAF reading is 335 g/s which equates to 410 bhp.

I don't understand how to analyse the ignition timing data which is another way of enhancing performance apart from upping boost, can anyone else decode it?

Car has done a genuine 51k, had defective diverter valves when this was logged, running Tesco Momentum 99 RON, 1/4 tank fuel, just me in car.

Thanks

[neckarsulm]

Bump, Doug, Minhea?

Here is data in an easier format to read

[SR71]

I reckon you need to log fewer blocks in "turbo" mode to get better resolution on the data for starters...during accel there is almost 500rpm between data points so its hard to see whats going on in much detail...

[neckarsulm]

Fair point but it's the same format as I have posted before and people have managed to assess it OK.
My main query is whether there is a way a MAF reading so high can be a bad thing e.g. boost leak?

[S2tuner]

log 003 115 020 in 3rd gear please then it'll mean a bit more, and after that do 003 118 031 too please

[neckarsulm]

Thanks, will do and nice and cold later this week

[neckarsulm]

Here's some data

[S2tuner]

it's a shame you didn't rev all the way to 7000, at least logs don't show it. Try to do a run in 3rd with 003 alone please, because I can't figure if your MAF values are so high only because you're lifting off at that point or what's going on exactly.

[neckarsulm]

I didn't rev all the way to 7000, the private road isn't long enough
Will try again soon
I am confused by MAF too, I did notice that it does feel very strong at the top end
Thank you for your help

[S2tuner]

the amount of boost it runs doesn't make it look that strong at all but it looks okay for a standard car, boost-wise at least.

[neckarsulm]

I meant strong as in the power keeps going all the way to the red line but I agree nothing like a mapped car.
Anyway here is some more data, MAF's even higher now!
I really can't wait to hear how a standard car can have such a high g/s, can MAFs go wrong and read high rather than the usual low?

[S2tuner]

Either your car is not standard, or something else is wrong, because I've never seen such high MAF readings before... It wouldn't be the first time I see someone buying a "stock" car that later turns out to have had a REVO trial on it...

[neckarsulm]

Why remap it in Jersey? 40 mph limit!
Been in England only for the last 2 years, serviced at Amersham Audi so not somewhere where they'd offer a Revo.
Genuinely 1 lady owner but her other car was a Cobra
Never had a belt change or discs and bought on mixed selection of cheap tyres, not a typical modded car.
Anyway how I can tell?
How can it be modded but on stock boost? Timing?

[neckarsulm]

Original MAF AFAIK as no extra stickers on it, no DTCs (which surprised me)

[S2tuner]

You didn't get me, it could be runing a now expired Revo trial, which never reverts to 100% stock, but rather Revo's interpretation of stock...
Without reading the ECU, there's no way to tell what is in there.