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2014 S5 - Switched to APR Stage 2+ Tune/Pulley - only making stock power, 290awhp

Discussion in 'Tuning' started by speedyf16, Aug 13, 2014.

  1. speedyf16
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    speedyf16 New Member

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    [Aug 13, 2014]
    As the title says, not sure what's up with my S5.

    Last night we only pulled 290 awhp out of the APR Stage 2+ tune with the pulley which basically is what most people see stock (see comparison with a 2010 S4 with just an exhaust). Power is already corrected for temperature. Altitude is 3500 feet.

    As you can see from the dyno curves, the tune seems to be running pretty rich (10.8 AFR) and timing is about 10 degrees less advance than stock.

    My initial datalog after getting the tune showed peak boost at 1974 mbar (13.9 psi over atmosphere). Stock boost was about 1600 mbar peak (8.5 psi). So the car is definitely getting more boost, and it is indeed faster.

    Stock runs averaged out to: 13.15s @ 105.1 mph. 0-60 in 4.62s

    APR Stage 2+ runs averaged: 12.79s @ 107.63 mph. 0-60 in 4.3s

    So E/T improved by about 0.3 seconds. MPH has gone up a bit. So not sure why the dyno results are so weird. Of course it's not the low 12s a lot of guys see with the APR stage 2 and pulley but I attributed that to only having the 91 octane program and being at 3500 feet above sea level. But perhaps I should be at least 12.5?

    I switched from GIAC Stage 1 which gave me zero performance increase whatsoever.

    Any feedback / comments would be greatly appreciated!

    Thanks

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