B7 RS4 Apr tune dyno comparison

All results from the 034 motorsports mustang dyno in the past 2 weeks

  1. Bensti
    Stock tune
    full ebwerks catless 2.75 exhaust, recently carbon cleaned
    328 WHP

  2. Bensti again
    APR 91 tune
    full ebwerks catless 2.75 exhaust, recently carbon cleaned
    325 WHP

APR tune nets -3 whp?

  1. Max from qw
    Stock tune
    Stock downpipes
    AWE cat back
    Fresh carbon clean
    329 WHP

  2. Meem
    APR 91 tune
    Stock downpipes
    AWE cat back.
    CC 5k miles ago. Checked carbon this week. Said hardly any. Dyno this week as well…
    327 WHP

APR TUNE nets -2 WHP?

Arin mentioned this week that adding exhaust modifications (decat, better diameter dp and cb) to these cars doesn’t add peak WHP. I found that weird because every dyno we have seen shows the opposite. With the exception of the APR tuned dynos from the past 2 weeks.

From the looks of those he is right…with the caveat being that adding exhaust in combination with an APR tune doesn’t add peak WHP. Or for that matter adding an APR tune doesn’t add peak WHP fullstop.