Is this all in my head?

oma3710 · 06-20-2012, 08:00 AM

I recently removed my second cat. And to me it seems like I got some gains. Is this all in my head?

zeel · 06-20-2012, 08:16 AM

Best way to tell would be a dyno or 1/4 mile before and after.

It is probably in your head though, as the major gains will be seen with DP.

itsmeek · 06-20-2012, 10:18 AM

Technically, any removal of exhaust restrictions should give you a bump in power on a turbo vehicle.

E90SoFlo · 06-20-2012, 10:26 AM

Its the louder noise making you feel faster.

plague · 06-20-2012, 10:32 AM

youre freeing up air flow and back pressure, you should gain a little bit sure. lol to 1/4 mile to test if you gained 15bhp of power. lolol.

E90Company · 06-20-2012, 10:45 AM

You probably will have slight gains

Turb0Surge · 06-20-2012, 10:45 AM

Quote:

Originally Posted by E90SoFlo

Its the louder noise making you feel faster.

Lol, but somewhat true.

nailer335 · 06-20-2012, 10:52 AM

Quote:

Originally Posted by itsmeek

Technically, any removal of exhaust restrictions should give you a bump in power on a turbo vehicle.

This is your answer. I wouldnt expect that youd gain more than ~6hp to the wheels. The more aggressive exhaust note might be affecting your perception, along with your expectation of gains through removing the secondaries, along with (possibly) having tuned the car to increase boost at around the same time as putting on your intake and JB4

06-20-2012, 08:00 AM	#1
oma3710 Major 195 Rep 1,282 Posts Drives: ? Join Date: Apr 2012 Location: Simpsonville, SC iTrader: (1)	Is this all in my head? I recently removed my second cat. And to me it seems like I got some gains. Is this all in my head? __________________ __________________ SOLD! X5 35i sdrive- JB4 SOLD! 435i- Cary Jordan E30 Tune~ Dinan Turbo~ BM3 trans tune~ XDI-35~ 3.5 T-map sensor~ VRSF HD FMIC~ VRSF Chargepipe~ VRSF Catless Downpipe~ CTS Intake~ FTP boost pipe~ FTP intake inlet~ FTP oil catch can~ Turbosmart dual bov~
	Appreciate 0 Tweet Quote

06-20-2012, 08:16 AM	#2
zeel Lieutenant 14 Rep 579 Posts Drives: 08 AW e92 335i Join Date: Nov 2010 Location: MD/NOVA/DC iTrader: (2) Garage List 2008 bmw e92 335i [7.34]	Best way to tell would be a dyno or 1/4 mile before and after. It is probably in your head though, as the major gains will be seen with DP.
	Appreciate 0 Quote

06-20-2012, 10:18 AM	#3
itsmeek Lieutenant 15 Rep 417 Posts Drives: 2009 E90 335xi Join Date: Mar 2012 Location: DC Metro iTrader: (3)	Technically, any removal of exhaust restrictions should give you a bump in power on a turbo vehicle. __________________ 1997 Supra TT (900ish hp) 2014 BMW 535d 1965 Mustang 302 5 speed! 2010 Prius
	Appreciate 0 Quote

06-20-2012, 10:26 AM	#4
E90SoFlo Banned 196 Rep 2,669 Posts Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL iTrader: (9)	Its the louder noise making you feel faster.
	Appreciate 0 Quote

06-20-2012, 10:32 AM	#5
plague Captain 40 Rep 957 Posts Drives: 335i sold :( / jb 20th AE Join Date: Mar 2011 Location: NJ iTrader: (2)	youre freeing up air flow and back pressure, you should gain a little bit sure. lol to 1/4 mile to test if you gained 15bhp of power. lolol. __________________ 07 335i- SOLD, and will be missed... Parts for sale- PWM meth kit, M steering wheel, M shift knob, perforated e brake handle
	Appreciate 0 Quote

06-20-2012, 10:45 AM	#6
E90Company Major General 195 Rep 6,136 Posts Drives: Car Join Date: Mar 2012 Location: FL iTrader: (2)	You probably will have slight gains
	Appreciate 0 Quote