Exhaust- Gain in HP or loss?

Wlew · 02-22-2010, 06:01 PM

I have been reading a lot about exhaust systems for the 06 330 (E90 body style) and most of the forms and dyno's show a loss in overall HP once an aftermarket system is set in vs the stock system.

I would think that with releasing a bit of back pressure, HP would go up... but according to these sites maybe its releasing too much?

is this true? or does anyone have any helpful hints. I want to gain ho not lose. and dont want to spend a lot of $$$

Looked at the Remus, for the deep note and not obnoxiously loud, good price. but what do yall have in mind?

thanks

c_jeong89 · 02-22-2010, 06:14 PM

well im pretty sure you won't lose any hp with the bmw performance exhaust since i doubt bmw will sell loss of hp products...i am not too sure about other exhausts though.

Wlew · 02-22-2010, 09:37 PM

http://www.turnermotorsport.com/html...=SPRINTBOOSTER

anyone know anything about these? for automatic and manual or just manual?

with the pbx, I doubt throttle response can feel any better, but figured id ask

Juan.sidarta · 02-23-2010, 02:59 AM

I think its for both. I read a couple of threads about it but I don't have one myself. Out of the 8 people who installed, only 1 didn't like it, and the other said it was a must have. I am thinking of putting one myself, but I'm waiting till I think my 328i is not fast enough. As of this moment, I'm still satisfied with my baby. But yea, I've heard it really boosted up the 0-60 speed WITHOUT increasing hp or torque. I think you should go for it!

DimSum · 02-23-2010, 06:30 AM

Sprintbooster is not even good. The PBX is basicly a sprintbooster + some other air/fuel mapping. I don't understand how you can doubt it is any good. It's DYNO proven to show 10whp.

MassBimmer · 02-23-2010, 08:58 AM

Most aftermarket exhausts offer hp gains because they reduce backpressure. Others advertise their product as an aesthetic upgrade that improves sound mostly (see Remus). BMW Performance exhaust claims hp gains of around 5 hp at the wheels and, for the price, is the way to go IMO

Alexander · 02-23-2010, 04:37 PM

I think that a lot of aftermarket systems for our cars cause a significant loss in low end torque. That's just my 2 cents.

I know that my set up definitely caused me to lose low end torque, but I gained some HP, cuz my butt dyno tells me. It's noticeably quicker 90-120 mph, but its noticeably slower 0-60.

02-22-2010, 06:01 PM	#1
Wlew Major 77 Rep 1,116 Posts Drives: 2011 E90 335i Join Date: Sep 2009 Location: Washington, DC iTrader: (12)	Exhaust- Gain in HP or loss? I have been reading a lot about exhaust systems for the 06 330 (E90 body style) and most of the forms and dyno's show a loss in overall HP once an aftermarket system is set in vs the stock system. I would think that with releasing a bit of back pressure, HP would go up... but according to these sites maybe its releasing too much? is this true? or does anyone have any helpful hints. I want to gain ho not lose. and dont want to spend a lot of $$$ Looked at the Remus, for the deep note and not obnoxiously loud, good price. but what do yall have in mind? thanks
	Appreciate 0 Tweet Quote

02-22-2010, 06:14 PM	#2
c_jeong89 Banned 85 Rep 2,097 Posts Drives: E90 TiAg Join Date: Feb 2009 Location: Irvine/Bay Area iTrader: (16)	well im pretty sure you won't lose any hp with the bmw performance exhaust since i doubt bmw will sell loss of hp products...i am not too sure about other exhausts though.
	Appreciate 0 Quote

02-22-2010, 09:37 PM	#3
Wlew Major 77 Rep 1,116 Posts Drives: 2011 E90 335i Join Date: Sep 2009 Location: Washington, DC iTrader: (12)	http://www.turnermotorsport.com/html...=SPRINTBOOSTER anyone know anything about these? for automatic and manual or just manual? with the pbx, I doubt throttle response can feel any better, but figured id ask
	Appreciate 0 Quote

02-23-2010, 02:59 AM	#4
Juan.sidarta Banned 48 Rep 1,040 Posts Drives: ex-e92 Join Date: Jan 2010 Location: Berkeley, CA iTrader: (8)	I think its for both. I read a couple of threads about it but I don't have one myself. Out of the 8 people who installed, only 1 didn't like it, and the other said it was a must have. I am thinking of putting one myself, but I'm waiting till I think my 328i is not fast enough. As of this moment, I'm still satisfied with my baby. But yea, I've heard it really boosted up the 0-60 speed WITHOUT increasing hp or torque. I think you should go for it!
	Appreciate 0 Quote

02-23-2010, 06:30 AM	#5
DimSum Banned 202 Rep 2,740 Posts Drives: SLOW Join Date: May 2008 Location: LITTLEBIMMER.COM iTrader: (10)	Sprintbooster is not even good. The PBX is basicly a sprintbooster + some other air/fuel mapping. I don't understand how you can doubt it is any good. It's DYNO proven to show 10whp.
	Appreciate 0 Quote

02-23-2010, 08:58 AM	#6
MassBimmer Major General 306 Rep 7,433 Posts Drives: 2023 i4 M50 Join Date: May 2009 Location: MA iTrader: (6) Garage List 2009 BMW [9.24]	Most aftermarket exhausts offer hp gains because they reduce backpressure. Others advertise their product as an aesthetic upgrade that improves sound mostly (see Remus). BMW Performance exhaust claims hp gains of around 5 hp at the wheels and, for the price, is the way to go IMO
	Appreciate 0 Quote

02-23-2010, 04:37 PM	#7
Alexander Mad tyte EuR0 style boooi <--- Joke 212 Rep 2,472 Posts Drives: E30, E85, MKVI Join Date: Nov 2009 Location: Deal's Gap iTrader: (0)	I think that a lot of aftermarket systems for our cars cause a significant loss in low end torque. That's just my 2 cents. I know that my set up definitely caused me to lose low end torque, but I gained some HP, cuz my butt dyno tells me. It's noticeably quicker 90-120 mph, but its noticeably slower 0-60.
	Appreciate 0 Quote