e92 rennart exhaust install and impressions

tomtom · 05-26-2008, 09:49 AM

just installed rennart non res DP back exhaust. first off, the install took a little longer than expected. the exhaust didnt center from the muffler section. my exhaust guy had to drill to adjust where the muffler sections intersect and bolt together. the heat shield on the passenger side muffler had to be pushed in a bit too.
also, the muffler tips weren't a tight fit. had to spot weld them. not a major concern, but I thought it was direct bolt on. had to pay an extra 1/2 hour labor though!

it sounds really nice done low 2-3k rpm...low rumble and nice when rev matching. above 3k not very loud, but i prefer it not to be too loud and obnoxious. overall happy with it.
i am dynoing it in a couple of weeks, but with the IC and exhaust now (and AA AP), car really pulls hard. I am happy with power level (maybe 350-360rwhp). doubt I will go beyond this.

EMPOWERD · 05-26-2008, 11:31 AM

pics of the exhaust (installed)

David 12 · 05-26-2008, 11:35 AM

WOW! Looks great - I see what you mean about the fitment, although the tips look very good.

jtdigital · 05-26-2008, 11:54 AM

looks nice

fedinand · 05-26-2008, 12:27 PM

Is this from the early batch or is this the production batch...wonder if this is what the delay is to fix these issues.

Dan335i · 05-26-2008, 12:49 PM

Looks great,lets hear it roar.

O-cha · 05-26-2008, 12:53 PM

Looks like you had the same problems as me. :/

CubanJJ09 · 05-26-2008, 01:21 PM

i want mine

tomtom · 05-26-2008, 02:32 PM

yeah...i like the tips too. I'll try to get a sound clip going. not sure if they do it justice. but will try

D0WN4IT · 05-26-2008, 04:18 PM

I like the exhaust but they didnt follow the stock exhaust design and go around the differential, now the piping is heating up the diff... Heres a pic of my custom exhaust, i had the maker follow the lines of the OEM piping...

ChaneRZ · 05-26-2008, 04:43 PM

vids!

scarzie · 05-26-2008, 04:48 PM

Quote:

Originally Posted by CubanJJ09

i want mine

same...

Emil@RENN-ART · 05-26-2008, 10:09 PM

Glad you're happy in the end!

Like some people above suspected, this was one of the first exhausts (he picked it up from another e90 member). By the way, for those first handful of customers we're offering a replacement in case they weren't able to adjust it to their liking.

On the big batch (crossing our fingers that it will be here at the end of this week) we had these issues addressed.

O-cha · 05-26-2008, 10:15 PM

Quote:

Originally Posted by Emil@RENN-ART

Glad you're happy in the end!

Like some people above suspected, this was one of the first exhausts (he picked it up from another e90 member). By the way, for those first handful of customers we're offering a replacement in case they weren't able to adjust it to their liking.

On the big batch (crossing our fingers that it will be here at the end of this week) we had these issues addressed.

That's awesome let me know when the new ones come in.

O-cha · 05-27-2008, 12:22 PM

Quote:

Originally Posted by D0WN4IT

I like the exhaust but they didnt follow the stock exhaust design and go around the differential, now the piping is heating up the diff... Heres a pic of my custom exhaust, i had the maker follow the lines of the OEM piping...

Do you know how hot the differential gets by itself? Really hot.

D0WN4IT · 05-27-2008, 01:45 PM

Quote:

Originally Posted by O-cha

Do you know how hot the differential gets by itself? Really hot.

So you really think that putting 1 pipe on either side of the diff running hot exhaust gas that gets hotter than the diff itself is not going to heat it up more than it already is? The leading cause of wear to trannys and diffs is heat, adding more heat to an already hot situation is a little less than smart...

O-cha · 05-27-2008, 03:06 PM

Quote:

Originally Posted by D0WN4IT

So you really think that putting 1 pipe on either side of the diff running hot exhaust gas that gets hotter than the diff itself is not going to heat it up more than it already is? The leading cause of wear to trannys and diffs is heat, adding more heat to an already hot situation is a little less than smart...

Do I think the exhaust is hotter? Yes absolutely. Could the exhaust possibly heat the diff through the insulation of the of air between them, especially while the car is moving, more than it already is? Or, even propogate enough heat transfer to make any difference what so ever? Absolutely not.

Maybe if that was a section of exhaust with radiant heat but it's not.

In otherwords it's not a simple design flaw, nor is it a critical design flaw as you eluded to.

D0WN4IT · 05-27-2008, 03:11 PM

Quote:

Originally Posted by O-cha

Do I think the exhaust is hotter? Yes absolutely. Could the exhaust possibly heat the diff through the insulation of the of air between them, especially while the car is moving, more than it already is? Or, even propogate enough heat transfer to make any difference what so ever? Absolutely not.

Maybe if that was a section of exhaust with radiant heat but it's not.

In otherwords it's not a simple design flaw, nor is it a critical design flaw as you eluded to.

I never called it a flaw, i just said that it would have been better to follow the lines of the oem piping to go around the diff... When the car is sitting still and running is when it will have the most affect on the diff... Like i said, just adding heat to a part that doesnt need anymore than it already generates...

David1 · 05-27-2008, 03:13 PM

I think I like tip number 1 better than tip 2. I need to call a switch them on my order!

Emil@RENN-ART · 05-27-2008, 04:08 PM

Quote:

Originally Posted by David1

I think I like tip number 1 better than tip 2. I need to call a switch them on my order!

Not a problem bud!

The exhausts arrive here on the 6th, so you have plenty of time to make up your mind. Just let us know sometime before then.

tomtom · 05-27-2008, 09:22 PM

hey I made the cover of www.rennart.com

they really like my photo of my car and their exhaust.

Soni · 05-28-2008, 01:29 AM

Quote:

Originally Posted by tomtom

hey I made the cover of www.rennart.com

they really like my photo of my car and their exhaust.

congrats!!

05-26-2008, 09:49 AM	#1
tomtom Captain 52 Rep 986 Posts Drives: e92 335i Join Date: Jan 2008 Location: ontario iTrader: (4)	e92 rennart exhaust install and impressions just installed rennart non res DP back exhaust. first off, the install took a little longer than expected. the exhaust didnt center from the muffler section. my exhaust guy had to drill to adjust where the muffler sections intersect and bolt together. the heat shield on the passenger side muffler had to be pushed in a bit too. also, the muffler tips weren't a tight fit. had to spot weld them. not a major concern, but I thought it was direct bolt on. had to pay an extra 1/2 hour labor though! it sounds really nice done low 2-3k rpm...low rumble and nice when rev matching. above 3k not very loud, but i prefer it not to be too loud and obnoxious. overall happy with it. i am dynoing it in a couple of weeks, but with the IC and exhaust now (and AA AP), car really pulls hard. I am happy with power level (maybe 350-360rwhp). doubt I will go beyond this.
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05-26-2008, 11:31 AM	#2
EMPOWERD track instructor 8 Rep 114 Posts Drives: 993 GT2, E46 M3, E93 335i Join Date: Aug 2007 Location: Mississauga, ON iTrader: (0)	pics of the exhaust (installed) Attached Images
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05-26-2008, 11:35 AM	#3
David 12 Major 127 Rep 1,048 Posts Drives: 2019 BMW X5 50i BSM, M Sport Join Date: Jan 2007 Location: Omaha iTrader: (0)	WOW! Looks great - I see what you mean about the fitment, although the tips look very good.
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05-26-2008, 11:54 AM	#4
jtdigital Private 3 Rep 84 Posts Drives: 335i Coupe Join Date: Mar 2008 Location: 626 CA iTrader: (2)	looks nice
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05-26-2008, 12:27 PM	#5
fedinand Major 74 Rep 1,271 Posts Drives: '11 X3, '11 GTI Join Date: May 2007 Location: MN iTrader: (6)	Is this from the early batch or is this the production batch...wonder if this is what the delay is to fix these issues.
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05-26-2008, 12:49 PM	#6
Dan335i Lieutenant Colonel 32 Rep 1,786 Posts Drives: 07 335i coupe 6MT,w/sp. pack. Join Date: Oct 2007 Location: orange county NY iTrader: (2)	Looks great,lets hear it roar.
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05-26-2008, 12:53 PM	#7
O-cha Brigadier General 218 Rep 4,726 Posts Drives: Mcoupe Join Date: Oct 2007 Location: In front of you iTrader: (2)	Looks like you had the same problems as me. :/ __________________
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05-26-2008, 01:21 PM	#8
CubanJJ09 Banned 169 Rep 12,680 Posts Drives: like an asshole Join Date: Feb 2008 Location: Chicago Burbs iTrader: (2) Garage List 2007 BMW 335i [6.18]	i want mine
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05-26-2008, 02:32 PM	#9
tomtom Captain 52 Rep 986 Posts Drives: e92 335i Join Date: Jan 2008 Location: ontario iTrader: (4)	yeah...i like the tips too. I'll try to get a sound clip going. not sure if they do it justice. but will try
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05-26-2008, 04:18 PM	#10
D0WN4IT Banned 2 Rep 114 Posts Drives: E92 335i Join Date: May 2008 Location: SoCal iTrader: (0)	I like the exhaust but they didnt follow the stock exhaust design and go around the differential, now the piping is heating up the diff... Heres a pic of my custom exhaust, i had the maker follow the lines of the OEM piping... Attached Images
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05-26-2008, 04:43 PM	#11
ChaneRZ If You Aint First, You're last !!! 81 Rep 2,509 Posts Drives: 08 BMW 335i, 01 Honda Prelude Join Date: Sep 2007 Location: California iTrader: (0)	vids! __________________ 08 BMW BSM 335i 6MT (Sports, Premium, NAV, PDC, AS, IPOD, HD Radio, Rear Sunshade, OEM Alarm) Angel iBright V3, Luminics Fog Bulb, Turbo Tuner, K&N Drop in Filter, Dinan Exhaust, Dinan Pedals, Vorsteiner CF Front Lip, and CF Rear Diffuser. Ordered:08/25/07 Started: 09/09/07 Finished: 09/14/07 On Ship: 09/15/07 Arrived: 10/08/07 Delivered: 10/10/07
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05-26-2008, 10:09 PM	#13
Emil@RENN-ART Second Lieutenant 11 Rep 214 Posts Drives: AW 335i Coupe Join Date: Mar 2007 Location: Chicago / Arlington Heights, IL iTrader: (1) Garage List 2007 335i Coupe [0.00]	Glad you're happy in the end! Like some people above suspected, this was one of the first exhausts (he picked it up from another e90 member). By the way, for those first handful of customers we're offering a replacement in case they weren't able to adjust it to their liking. On the big batch (crossing our fingers that it will be here at the end of this week) we had these issues addressed. __________________ _________________________________ www.RennArt.com 1034 Addison Ct. Arlington Heights, IL 847-593-1066
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05-27-2008, 03:13 PM	#19
David1 Brigadier General 814 Rep 3,953 Posts Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: Columbus, OH iTrader: (1)	I think I like tip number 1 better than tip 2. I need to call a switch them on my order!
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05-27-2008, 09:22 PM	#21
tomtom Captain 52 Rep 986 Posts Drives: e92 335i Join Date: Jan 2008 Location: ontario iTrader: (4)	hey I made the cover of www.rennart.com they really like my photo of my car and their exhaust.
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