silva

Just trying to get an idea of how my car is running. For those that don't know, and would like to comment, I am running standard RS4 K04 turbos, MTM downpipes and exhaust, greentops, and a custom 88mm MAF (hitachi), on an RS4 airbox. Software is by REVO.

Since the last runs I did a week ago, I have changed my spark plugs for the OEM to BOSCH F5DP0R. I have noticed that the car is pulling back less timing, but the Knock sensor voltages are a little higher (temperature was about the same).

Here is the custom V&S billet aluminium straight through 88mm MAF, which will be in production within the next couple of weeks.

<img src="http://pictureposter.audiworld.com/40679/july_2004_012.jpg">

Boost: 3rd gear pull

<img src="http://pictureposter.audiworld.com/40679/log-01-003-005-11520050205_17052_image001.jpg">

MAF g/s: 3rd gear pull

<img src="http://pictureposter.audiworld.com/40679/log-01-003-005-11520050205_23743_image001.jpg">

Timing and throttle angle: 3rd gear pull

<img src="http://pictureposter.audiworld.com/40679/log-01-003-005-11520050205_4247_image001.jpg">
<img src="http://pictureposter.audiworld.com/40679/log-01-003-005-11520050205_14684_image001.jpg">

Timing CF: 3rd gear pulls (2)

<img src="http://pictureposter.audiworld.com/40679/log-01-020-021-11520050207_2326_image001.jpg">

<img src="http://pictureposter.audiworld.com/40679/log-01-020-021-11520050206_22328_image001.jpg">

Knock sensor voltages (2): 3rd gear pull (cylinders 2 and 5 seem higher than in previous runs, may need to pull back some timing)

<img src="http://pictureposter.audiworld.com/40679/image001.2.jpg">

<img src="http://pictureposter.audiworld.com/40679/image002.1.jpg">

O2 sensor voltages: 3rd gear pull

<img src="http://pictureposter.audiworld.com/40679/log-01-031-032-11520050205_25503_image001.jpg">

EGT: 3rd gear pull (I'm wondering which block refers to the driver's side bank).

<img src="http://pictureposter.audiworld.com/40679/image002.jpg">

here are a few raw nubmers which I used to calculate an average FATS of 4.2. Does that seem about right?

3.33 4000
4.25 4520
5.24 5080
6.3 5640
7.39 6200
8.52 6680

3.63 4160
4.58 4720
5.58 5280
6.66 5840
7.77 6360
8.89 6240

3.02 3800
3.95 4360
4.91 4880
5.94 5480
7.01 6000
8.15 6560

28.63 3880
29.56 4400
30.54 5000
31.56 5520
32.64 6080
33.77 6600

28.93 4040
29.88 4600
30.86 5160
31.93 5720
33.03 6240
34.15 6720

28.32 3680
29.24 4200
30.19 4800
31.21 5360
32.28 5880
33.39 6400

ImolaRocket

When, where and how much for the MAF ??

silva

The MAF pictured does not have the slots cut out to fit over the tabs on either side of the RS4 airbox outlet mounting holes. The production piece will likely have those slots milled out. It fits the RS4 airbox and accordian tube.

Email me for more info/pics.

PSmalls::DoggieStyle

I still say your airflow is way low for the MAF housing and boost you're running.

PSmalls::DoggieStyle

I doubt you'd want this to get deleted.

BLK01S4

MAF wont hit 5v

PSmalls::DoggieStyle

I just don't see how it is *accurate* considering others with 88mm MAF are flowing almost 75 g/s more. Something is not right.

PSmalls::DoggieStyle

sensors. Your correction factors/timing retard look fine (single digits) so I don't think there is any need to lower timing.

I'd like to see you turn the boost up to ~1.3-1.4 bar and take a 3rd gear pull *all the way to redline* while logging MAF to see what it will max out at. The low boost and early shut down are probably a big factor in why the MAF readings are so low.

silva

I'll do that as soon as I get the SPS 3 (newest version, does fuel/timing/boost).