BMW 135i Exhaust Prototype by HPF

rader1 · 04-14-2011, 11:11 AM

Looks and sounds awesome

HPF Chris · 04-14-2011, 06:55 PM

Quote:

Originally Posted by rader1

Looks and sounds awesome

escobar929 · 04-15-2011, 07:26 AM

ok, HPF totally redeemed themselves, I love the fitment. Even w/ an iCarbon diffuser, the tips still stick out just a tad, to where you can see the HPF logo

outstanding work!

HPF Chris · 04-15-2011, 11:16 AM

Quote:

Originally Posted by escobar929

ok, HPF totally redeemed themselves, I love the fitment. Even w/ an iCarbon diffuser, the tips still stick out just a tad, to where you can see the HPF logo

outstanding work!

Thanks.

Clap135 · 04-15-2011, 11:42 AM

Those spacers look massive and appear to compromise the purpose of that brace all together. Those lowered, becareful cause it would sure suck to snag on that

mineo77 · 04-15-2011, 12:10 PM

sick! cant wait till it gets back from being polished!

miro2296 · 04-15-2011, 02:54 PM

Do these fit the stock diffuser?

mineo77 · 04-15-2011, 04:02 PM

Quote:

Originally Posted by miro2296

Do these fit the stock diffuser?

yep

miro2296 · 04-15-2011, 04:43 PM

Quote:

Originally Posted by mineo77

yep

Cool thanks!

Makkasteez · 04-15-2011, 09:02 PM

damn is that loud ass spool coming from the exhaust? what else is done to the engine?

mineo77 · 04-16-2011, 02:11 AM

Quote:

Originally Posted by Makkasteez

damn is that loud ass spool coming from the exhaust? what else is done to the engine?

hehehe....

Elsabor67 · 04-16-2011, 02:41 AM

Quote:

Originally Posted by mineo77

hehehe....

Sounds like you have a killer in your hands. The revs sound incredible. I'm also intrigued as to what else you have done under the hood. Those turbos whistling make you wonder.........

adrean8j · 04-16-2011, 03:09 AM

Quote:

Originally Posted by Makkasteez

damn is that loud ass spool coming from the exhaust? what else is done to the engine?

Quote:

Originally Posted by mineo77

hehehe....

Quote:

Originally Posted by Elsabor67

Sounds like you have a killer in your hands. The revs sound incredible. I'm also intrigued as to what else you have done under the hood. Those turbos whistling make you wonder.........

That whistle you hear are the wastegates

...I have the same exact whistle

So with the same car and a different aftermarket exhaust you will still hear that whistle (probably heard it with the stock exhaust as well).

1&done · 04-16-2011, 09:45 AM

That's a pickle tickle....I vant one!! Available?

1SerieStud · 04-16-2011, 12:06 PM

Quote:

Originally Posted by adrean8j

That whistle you hear are the wastegates

...I have the same exact whistle

So with the same car and a different aftermarket exhaust you will still hear that whistle (probably heard it with the stock exhaust as well).

lol no, the whistle comes from turbo spool up. When the wastegates open (which ONLY happens at full boost - this is how boost is controlled) all you hear is a slightly louder exhaust note, which cannot be heard in this video since these cars are not programmed to hit full boost while being revved in place with no engine load.

Clap135 · 04-16-2011, 12:24 PM

Quote:

Originally Posted by 1SerieStud

lol no, the whistle comes from turbo spool up. When the wastegates open (which ONLY happens at full boost - this is how boost is controlled) all you hear is a slightly louder exhaust note, which cannot be heard in this video since these cars are not programmed to hit full boost while being revved in place with no engine load.

the noise is infact turbo spool down.
When wastegates open, the car gets loud
When wastegates close, the car is quiet.

adrean8j · 04-16-2011, 01:01 PM

Quote:

Originally Posted by 1SerieStud

lol no, the whistle comes from turbo spool up. When the wastegates open (which ONLY happens at full boost - this is how boost is controlled) all you hear is a slightly louder exhaust note, which cannot be heard in this video since these cars are not programmed to hit full boost while being revved in place with no engine load.

You only hear it when you lift throttle...so that would be when the turbo spools down like Clap135 says

Quote:

Originally Posted by Clap135

the noise is infact turbo spool down.
When wastegates open, the car gets loud
When wastegates close, the car is quiet.

So how do you explain the wastegate rattle that gets louder as you rev the engine videos (stationary vehicles mind you). Not trying to debunk you just trying to understand where the rattle is coming from...the turbo's, wastegates, or whatever regardless are not supposed to sound like that.....

Makkasteez · 04-16-2011, 01:03 PM

i know it was the spool down, i hear it on my car as well with stock exhaust. i was asking if this is exhaust is what made the spool down sound so much louder than stock?
:]

competition · 04-16-2011, 01:24 PM

I Want This Exhaust Now!!!!!!!!!!!!!!!!!

adrean8j · 04-16-2011, 01:25 PM

^^^Nah I don't think so...when I first added my exhaust and midpipes it was a pretty quiet sound (over a year ago now) compared to how loud it is now...mine is at least near as loud as in the video...I was told from a pretty reliable source that is was the wastegates rattling...upon making a wastegate adjustment (procede) said rattle was reduced with the added side-effect of the exhaust being louder....this is all at idle...

competition · 04-16-2011, 07:44 PM

I've been shopping around for an exhaust for at least 2 months now and I'm for sure set on this one. I seriously can't wait for the release of this one!!!!!!!

mineo77 · 04-17-2011, 02:18 AM

Quote:

Originally Posted by goeslikeschnell

I've been shopping around for an exhaust for at least 2 months now and I'm for sure set on this one. I seriously can't wait for the release of this one!!!!!!!

Well you don't have to wait much longer. expect to hear more info after Mfest. First one is being installed Monday or Tuesday...if no problems with fit etc then they will be ready to pick up

04-14-2011, 11:11 AM	#177
rader1 Banned 70 Rep 2,197 Posts Drives: Cobb Stage 2+ 135i Join Date: Apr 2011 Location: Roanoke, VA iTrader: (0)	Looks and sounds awesome
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04-15-2011, 07:26 AM	#179
escobar929 Brigadier General 154 Rep 4,528 Posts Drives: M2 CS Join Date: Aug 2009 Location: Hollywood, FL iTrader: (14) Garage List 2020 M2 CS [10.00] 2020 M240i [0.00]	ok, HPF totally redeemed themselves, I love the fitment. Even w/ an iCarbon diffuser, the tips still stick out just a tad, to where you can see the HPF logo outstanding work!
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04-15-2011, 11:42 AM	#181
Clap135 Brigadier General 103 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Those spacers look massive and appear to compromise the purpose of that brace all together. Those lowered, becareful cause it would sure suck to snag on that
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04-15-2011, 12:10 PM	#182
mineo77 Lieutenant Colonel 124 Rep 1,925 Posts Drives: 2010 135i,1989 PRO3,2001 530i Join Date: Aug 2009 Location: Portland,OR iTrader: (2) Garage List 2010 135i coupe [7.56]	sick! cant wait till it gets back from being polished! __________________ 135i coupe  6MT  TiAg  ///M sport http://www.rhominnovations.com www.musicarNW.com www.unitedBMWonline.com
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04-15-2011, 02:54 PM	#183
miro2296 Colonel 57 Rep 2,251 Posts Drives: '08 Montego Blue BMW 135i Join Date: Nov 2008 Location: Round Rock, TX iTrader: (1)	Do these fit the stock diffuser? __________________ ------------------------------------- BMW 135i/6 Speed/Montego Blue/Formula One Ceramic Tint/JB4 G4/AA Sport Intercooler/19 inch Iconz 880Z(19X8.5 & 19X10)/PSS 225/35 & 265/30/E93 M3 front sway bar/TRW front and rear Control Arms/BMS Drop In Filter/Dinan Exhaust/BlackLines/Upgraded \\\M RSFB
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04-15-2011, 09:02 PM	#186
Makkasteez 1nt3n5ity 41 Rep 390 Posts Drives: 08' 135i Join Date: Jun 2009 Location: San Francisco, CA iTrader: (1)	damn is that loud ass spool coming from the exhaust? what else is done to the engine?
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04-16-2011, 09:45 AM	#190
1&done Lieutenant Colonel 247 Rep 1,585 Posts Drives: 2011 VO 1M Join Date: Sep 2010 Location: Jupiter, FL iTrader: (28) Garage List 2010 Porsche 911 GT3 [10.00] 2021 BMW X5 SD40i [0.00] 2023 Toyota TRD Pro [0.00] 2011 BMW 1M [9.83] 2014 Ford Raptor [0.00] 2005 Ariel Atom 2 [0.00] 2008 135i SOLD [10.00]	That's a pickle tickle....I vant one!! Available? __________________ ///1M #643 of #740
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04-16-2011, 01:03 PM	#194
Makkasteez 1nt3n5ity 41 Rep 390 Posts Drives: 08' 135i Join Date: Jun 2009 Location: San Francisco, CA iTrader: (1)	i know it was the spool down, i hear it on my car as well with stock exhaust. i was asking if this is exhaust is what made the spool down sound so much louder than stock? :]
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04-16-2011, 01:24 PM	#195
competition Major 299 Rep 1,329 Posts Drives: '21 F87 M2C Join Date: Jun 2010 Location: ETH 2.0 iTrader: (10)	I Want This Exhaust Now!!!!!!!!!!!!!!!!!
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04-16-2011, 07:44 PM	#197
competition Major 299 Rep 1,329 Posts Drives: '21 F87 M2C Join Date: Jun 2010 Location: ETH 2.0 iTrader: (10)	I've been shopping around for an exhaust for at least 2 months now and I'm for sure set on this one. I seriously can't wait for the release of this one!!!!!!!
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