M3EvoBR

Ok,

So finally the numbers are here, I'll also update the other threads with this info.


This is Erik's 3.6 GT3RS - M&M catless headers, side mufflers delete, Stock center muffler


997FLA's 3.6 GT3 - Europipe straight pipes


Izzone's 3.8GT3RS - Akrapovic Cup system


Trakcar's 3.8GT3RS - Side muffler delete, Stock center muffler, GIAC tune

DRPM

interesting
Any idea what causes the dip in the mid 6k rpm range?

M3EvoBR

Which graph are we looking at ???

NJ-GT

My 2004 GT3, muffler bypass pipes, stock ECU, stock cats, stock headers

NJ-GT

This one from a bone stock 2010 GT3 RS 3.8

FFaust

The two 3.8's.

TRAKCAR

2010RS with GIAC tune, full CUP exhaust, headers and only cats in final muffler = Torque monster!!
I think we will have to verify this run again on Eddies Dyno to make sure. Almost to good to be true.

M3EvoBR

At 6000 RPM I don't see any deep, I see a 'flatter' spot at around 6600, which should be the cams... all of them have that, tuned, not tuned.

aussie jimmy

FLA997 has dip as well, but erik's has a small dip.
maybe it's the cats?

aussie jimmy

variable cam timing?

TRAKCAR

My car stock '10RS with only final sharky final bypas exhaust. Looks like I have 4 HP more but 25TQ less!!

M3EvoBR

yeap ... they are not dips, just flatter spots.
You see them all the time on smaller engines like hondas with Vtec, and other variable cam engines.

aussie jimmy

ok, yep understood!

M3EvoBR

Peter,

I believe this is a dyno difference, as you can see John's car has TONS of torque. We will know for sure as soon as we put his car here.

NJ-GT

Torque figures from that Champion dyno don't look legit.

John's car to the AWD dyno (NASA Florida certified) again, his torque numbers look identical to a 5.2 V10 LP560/4 on a dynojet, no way a 3.8RS has the same torque as a 5.2 V10.