[mikethemini]

@TurboTim

...dann habsch´s doch falsch verstanden...

@Topic

Die Anlage von Alta ist auf deren Prüfstand extra auf Leistung getrimmt worden... die haben von ihrem Werks-S die 175PS auf knappe 195PS gebracht, nur mit der (allerdings) kompletten Edelstahanlage ohne Softwareänderung...

[B]ALTA R56 DOWNPIPE TEST AND TUNE[/B]


After we tested our catback exhaust, next up was the ALTA 3" Downpipe in addition to the catback. The ALTA R56 3" Downpipe consists of similar parts as the cat back. Same 3" 304SS tubing, but add a 3” CARB legal cat to the front section and rear section (just like the OEM), and hightech V-band clamps connection joining it all together. This makes for a complete turbo back system in full 3" tubing except for the first few inches are 2.5” tubing to make for a smooth turbo connection and gain clearance around the header. One of the most important features is that the OEM heat shields fit over the downpipe. This we feel is very important as the turbo sits so close to the hood.

Onto the dyno test. Like the catback by itself adding the downpipe and midpipe netted very good gains. We gained more than 20WHP and 20ft-lbs which is awesome considering the car still runs the same boost levels during these runs. Besides the HP we gained during the runs, one thing we noticed was while the car was in its holding pattern on the dyno, it was getting 7psi of boost now, not the 4-5. This is also seen on the graphs by the huge 40ft-lbs gained at 2000 rpm! So another important thing to take note of! This would definitely be noticeable on the road at low rpm. Sure enough, on the freeway cruising around, we get nearly instant boost response.

We are setting the standard from which others will be judged from. Yes another company has an R56 exhaust out, but its 2.5” and they never did a before HP run. So they claim it makes 27HP because they made 202 at the engine, and since the stock car is supposed to make 175, it must make 27HP. Not very good proof IMHO.


...man beachte im letzten Abschnitt das Fett gedruckte...

Allerdings müßte ich echt noch in Erfahrung bringen, ob diese Werte auch auf unsere deutschen Cooper S übertragbar sind... weiß nicht ob wir die gleiche Soft faahn wie die Ami´s?!

*edit*
Hab gerade ne e-mail von Steinbauer erhalten bezgl. auf meine Frage hin, ihrer versprochenen 255PS beim S... antwort: Ihr momentane Elektronik-Soft mit 225PS läuft in ihrem Werks-S seit ca 1nem Jahr ohne Prob´s... die 255PS (Ausbaustufe II) erreichen sie dann hauptsächlich mit einer komplett geänderten (von Steinbauer benannt)High-Flow-Abgasanlage... Rohrdurchmesser 70mm...