what's the benefit of the turboback exhaust??

135iDCT · 11-06-2011, 06:02 PM

any gains or just to make the car loader....or it's a must if im running high boost
16 psi +

MGallop · 11-06-2011, 06:32 PM

around 15-20hp gain from running a catless dp. and not to mention the weight savings from stock is huge.

sear · 11-06-2011, 07:58 PM

Turbos will spool quicker with DPs also and less backpressure for them to deal with when targeting higher boost levels. HP gains and a little less stress on turbos to achieve higher gains are probably the main reasons for most folks to add DPs rather than just a louder exhaust.

1speedbike · 11-06-2011, 08:06 PM

I agree with what has been said above. Less restriction, freer flowing air, turbos breathe more easily. ~15-20 hp gains just from switching to catless. On top of this, if you're running a tune, adding catless DPs will let you run a higher boost because of the easier breathing turbos. So on top of the gains from just breathing better, you can have more aggressive boost which leads to even more gains.

135iDCT · 11-06-2011, 08:15 PM

thanx all

11-06-2011, 06:02 PM	#1
135iDCT Lieutenant 137 Rep 571 Posts Drives: 135I Join Date: Apr 2011 Location: wm iTrader: (0)	what's the benefit of the turboback exhaust?? any gains or just to make the car loader....or it's a must if im running high boost 16 psi +
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11-06-2011, 06:32 PM	#2
MGallop Major 49 Rep 1,072 Posts Drives: 12' 135i Join Date: Feb 2011 Location: San Jose, California iTrader: (1) Garage List 2012 BMW 135i [10.00]	around 15-20hp gain from running a catless dp. and not to mention the weight savings from stock is huge. __________________ Matthew Gallop: '12 N55 Mods: JB4 Flex ISO \| iCarbon DP \| VRSF 5" FMIC \| BMS Intake \| ER Charge Pipe \| Race Axleback \| ST Coils \| Alufelgen CS7's \| iCarbon 3 fin Diffuser \| Blackline LCI \| CarbonFiber Spoiler \| Orion v4 AE's \| 30% tint \| red+blk roundels \| Cyba Scoops \| H-Style front Lip \| WeissLicht LED Smoked Sidemarkers \| Matte Grills \| Coded \|
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11-06-2011, 07:58 PM	#3
sear Lieutenant 18 Rep 462 Posts Drives: 2007 335xi Join Date: Sep 2009 Location: Colorado Springs iTrader: (0)	Turbos will spool quicker with DPs also and less backpressure for them to deal with when targeting higher boost levels. HP gains and a little less stress on turbos to achieve higher gains are probably the main reasons for most folks to add DPs rather than just a louder exhaust.
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11-06-2011, 08:06 PM	#4
1speedbike Brigadier General 732 Rep 3,274 Posts Drives: 2022 X4 M40i, 2008 135i Join Date: Jun 2008 Location: MKE iTrader: (15)	I agree with what has been said above. Less restriction, freer flowing air, turbos breathe more easily. ~15-20 hp gains just from switching to catless. On top of this, if you're running a tune, adding catless DPs will let you run a higher boost because of the easier breathing turbos. So on top of the gains from just breathing better, you can have more aggressive boost which leads to even more gains. __________________ 2022 X4 M40i - 2008 135i - 2015 F700GS On Order - 2024 i4 M50 Scruffy's gonna die the way he lived... Mmhm.
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11-06-2011, 08:15 PM	#5
135iDCT Lieutenant 137 Rep 571 Posts Drives: 135I Join Date: Apr 2011 Location: wm iTrader: (0)	thanx all
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