Go to the original thread to see the differences in these cars which might also contribute to the outcome...


I took this:



and scaled each linearly so they have the same temp at 3200 RPMs. That seemed like a good spot to line them up as all curves seemed to exhibit that constant temp for a bit in that area. Now the shapes of the curves are shown in better comparison to each other:



AWE = Lt Green (Mark's APR)
AWE = Red (Erik's AWE)
RS4 = Lt Blue (Dave's EPL)
RS4 = Dk Green (Andrew's MTM)
RS4 = Dk Blue (Matt's EPL)

The IAT results may be affected by more than just the choice of IC, since every car is running a different setup. Boost levels should certainly be taken into account, which will cause higher IATs.

My observations:

- Lt Green and Red (AWE ICs) are trending together (near identical, even with different software/boost/etc)

- Dk Blue and Lt Blue (RS4 ICs) are trending together.

- Dk Green is the same IC (RS4) as the Lt Blue an Dk Blue, but Dk Green is running much less boost, and likely why it's not trending with the Blues.

- Dk Blue is the only different turbo (K04/Mitsu), and as such may be working differently and may be the cause if it running hotter IATs than Lt Blue, even considering that Lt Blue is running more boost. Dk Blue is getting the hottest the quickest. Perhaps the ICs are poorly flowing (either from exterior restrictions or internal oil), or maybe it's the turbo. I don't think it's due to it running a bit leaner, as all have similar EGTs

- Considering all of the variations, the IAT's still seem to trend differently between the RS4 IC and AWE IC. I'm somewhat surprised to see the difference that exists. Kudos to AWE if these are the same results obtained in a more controlled environment.

• http://forums.audiworld.com/s4/msgs/2362683.phtml

Mark P


Dyno: 469wHP / 451wTQ
93 oct - best 60':1.734 | best 1/4ET:12.239 | best 1/4mph:116.58
100+oct - best 60':1.698 | best 1/4ET:11.762 | best 1/4mph:121.72



ECUx template version 11.16 (3/12/07)
AWD Dynos by State - Race Gas in New England - B5S4 100k+ mile post

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'02 Audi S4 Avant, Imola Yellow, APR Stg3 - imolavant website - 185k miles
'01.5 VW Golf 4dr 1.8T, Satin Silver, GT28R, EPL-tuned - 14.8 | 101mph - 196k miles
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