To VAG-Com users, FATS times database for the Euro S4s

[JonnyX]

Dippy, those are the kind of times I get - my best is 5.3. I think something is wrong with my car too
Your timing doesn't look great (better than mine though). What does your boost gauge say?

[S2tuner]

I'd be curious for Dazzer to post an FATS run, that should be interesting... and Brett too... come on guys, it's for the sake of the community


Mihnea

[Dippy]

I'm disappointed Mihnea - I expected at least some technical comment from you about my results!

Jonny,
my boost guage is fine, and still can peak around 1.35 bar. As I posted a while ago, it did seem low for about a week but then got back to normal.

The car is very much in need of a service which AmD will do soon (please no comments about costs), so I'll mention this to them for the RR tune-up. It may be just my old plugs and air-filter that are holding the engine back a bit...

[S2tuner]

Dippy, sorry about that, I had stuff over my head here when I read your first post and didn't figure I was expected to give some input


IMHO yours and Jonny's aren't running too bad, the only issue that I see with your numbers (Dippy) is that IMHO you're running way too much boost for what the K03s can take reliably and efficiently in the long run... 1.35 Bar means very high exhaust backpressure (because of the K03 hotsides being so small and restrictive), which will lead to an engine that will detonate much easier than on lower boost, so this would be a normal explanation for your car running very low ignition timing on full boost.

I must now say that I have done a few more runs on Shell 98 RON on my car yesterday (was going for a few beers with DaveP in Brussels) and I have lost 0.3 of a second because of getting 6 degrees <beep> on full boost, my first run (the one that's posted) had been done on Total Excelium 98 RON, and IMHO that juice rocks in Belgium.

Dippy, if you want to find out more as to why your engine is holding back, log knock sensor CFs in channel 020, if they are pretty high, that is half of your answer. IMHO an S4 can do around 340-350 HP with a very free flowing exhaust by running very reasonable boost, the boost I'm running now (same as when I posted the first FATS run) is 1.2 Bar absolute peak and tapering to 0.8 at redline. Too much boost will make the engine flow lots of air (high MAF) but the problem is that when the engine flows that air but can't get it out through the exhaust (backpressure), you won't make good power, and that sort of power is also something that's not going to last for very long if you really have it (280g/s at ~6000 RPM being about 380 BHP)....


HTH,

Mihnea

[audiboy]

We found the same with my S2. Running huge boost was great, but we had to run low advance. Now the car has had the boost turned down and running loads more advance the car is actually faster. Boost is a modest 1.7 peak and 1.35 redline.

[Dippy]

Thanks Mihnea (of course you're not expected to give an input, but I do appreciate it!).

Please note that 1.35 bar is my absolute peak, something which I check just as a crude indication that there are no air leaks. When I'm not forcing such a peak, I usually get around 1.2 bar at WOT. Not sure what the boost is at readline - I'll check.

Interesting what you say about MAF - maybe my current 250 is peak is expected?

I've dug out the 280 log, and note that it's actually group 002, however this should be the same MAF reading???


TIME REVS LOAD INJ MAF
662.54 3960 160.9 16.32 190.36
663.16 4280 176.7 22.1 222.61
663.78 4440 99.2 9.86 131.72
664.41 4600 109.8 10.88 150.11
665.07 4720 67.7 7.48 105.72
665.72 4920 166.9 21.42 247.06
666.39 5200 175.9 25.5 266.94
667.09 5480 166.2 24.82 261.72
667.8 5760 161.7 24.82 268.94
668.52 6000 155.6 23.46 272.5
669.26 6240 152.6 22.78 275.03
670.02 6440 148.9 22.1 277.47
670.77 6640 145.9 21.08 280.83
671.53 6840 129.3 16.32 201.97

[audiboy]

280 MAF is about 380bhp?? Surely thats never right from a car with a remap and exhaust?
250 MAF is about 340 bhp which is about what i would expect from a remap and exhaust? Does you car have the DP's too dippy?

[Dippy]

Tom,

As far as I know it's the full Miltek system.

[Nige_RS4]

Carried out a FATs run in my S4 today - temp was 22 deg.

time rpm MAF throttle timing
270.37 4240 195 100 10.5
270.69 4440 200.44 100 9.8
271.01 4560 203.53 100 10.5
271.33 4720 207 100 11.3
271.66 4880 208.39 100 13.5
272 5040 209.83 100 15
272.33 5160 212.92 100 15
272.68 5320 219.64 99.6 15
273.03 5480 221.86 100 15
273.5 5640 226.42 100 17.3
273.86 5800 227.53 100 16.5
274.22 5960 230.69 100 17.3
274.59 6080 228.25 100 18.8
274.96 6200 230.81 100 18.8
275.33 6320 230.81 100 18.8
275.84 6480 231.42 99.6 20.3

Online calculator say 5.62 secs.

[S2tuner]

Guys, you have to catch the RPM points before 4200 and after 6500 too and hit the throttle at 3k as well


Cheers,

Mihnea

[Nige_RS4]

I've overlayed my timing with Minheas and Dippys - I have had to massage the data slightly so that the graph shows timing at roughly the same revs.

modules/pnCPG/Coppermine/albums/userpics/10231/rs246_norm_FATs%20timing.jpg

[S2tuner]

Nice one Nige!!!

[Nige_RS4]

Guys, you have to catch the RPM points before 4200 and after 6500 too and hit the throttle at 3k as well

Minhea, I did, but just didn't post them in an attempt to keep it as simple as possible!

[S2tuner]

Lol, ok Nige

[Nige_RS4]

Minhea, do you think I can advance the timing even more on my car - I'm running optimax + millers.

Also, my MAF reading looks a tad low - it's been higher than that before (~255g/s) - could it be lower due to higher outside temps?