BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Today's Posts


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
BPM
Post Reply
 
Thread Tools Search this Thread
      03-10-2009, 12:20 PM   #1
jimmyeatsworld
Second Lieutenant
7
Rep
213
Posts

Drives: 2008 E92 M3 6MT
Join Date: Nov 2008
Location: Orange County

iTrader: (0)

RPI Full GT Exhaust Review/Dyno

I got my RPI Full GT Exhaust installed last Saturday before the VRS meet.

Overall, I am very impressed with the exhaust's performance, the quality of the product, and RPI's customer service. I have no regrets.

I did a pre and post install dyno, and the results were very good. My base line was 327hp and the car was bone stock. My post install dyno was 351hp.

Performance wise, the car pulls harder thoughout the power band. I feel more torque, and the car doesn't have that "heavy" feeling that it once had. I don't know if anyone would believe me, but while driving to the VRS meet, I took the toll roads from Yorba Linda, the car felt more to the ground, the car felt more stable. I'm guessing it's the lighter weight, maybe it's my imagination. I'm sure all the socal peeps know that drive, it's pretty curvy with elevation changes, with open highway.

Sound wise, I like it. It is loud. To describe what it sounds like, I think it has 2 tones to it. It has that deep low tone at take off/low rpm, then a higher pitch a little bit raspy scream at WOT, and there is little drone. Personally, I think it sounds better in person. The week before the install, I had my buddies hear the exhaust from the Youtube clips, and one of them didn't like it. That changed when he heard it in person that day, and says the clips don't do justice.

I recommend this to anyone who's a performance enthusiast, an attention whore (you will get stares), and those who don't mind random competition from other drivers. It has made my driving more fun. Props to RPI.

Here is the dyno.
Attached Images
 
Appreciate 0
      03-10-2009, 12:23 PM   #2
McLuVan
Lieutenant General
McLuVan's Avatar
Vietnam
312
Rep
13,094
Posts

Drives: ///M3
Join Date: Jan 2008
Location: Socal~818~

iTrader: (1)

24RWHP!??!?!?!1
holy smokes!
Appreciate 0
      03-10-2009, 12:28 PM   #3
jimmyeatsworld
Second Lieutenant
7
Rep
213
Posts

Drives: 2008 E92 M3 6MT
Join Date: Nov 2008
Location: Orange County

iTrader: (0)

Yea I think it would of been higher too, if it wasn't for the bad air quality. The shop was full of smoke from the exhaust.
Appreciate 0
      03-10-2009, 12:29 PM   #4
McLuVan
Lieutenant General
McLuVan's Avatar
Vietnam
312
Rep
13,094
Posts

Drives: ///M3
Join Date: Jan 2008
Location: Socal~818~

iTrader: (1)

Quote:
Originally Posted by jimmyeatsworld View Post
Yea I think it would of been higher too, if it wasn't for the bad air quality. The shop was full of smoke from the exhaust.
what in the world
what's in that exhaust!
Appreciate 0
      03-10-2009, 12:52 PM   #5
///M PWR 00
Captain
///M PWR 00's Avatar
92
Rep
937
Posts

Drives: Porsche
Join Date: Mar 2008
Location: Yonkers, NY

iTrader: (0)

Awesome gains! I am so impressed with RPIs work thus far.... any video footage?
__________________
Appreciate 0
      03-10-2009, 02:28 PM   #6
tightie
JOSH SHOKRI.
tightie's Avatar
United_States
536
Rep
5,874
Posts

Drives: 991 GT3RS, 964, Raptor
Join Date: Aug 2005
Location: los angeles, california.

iTrader: (7)

Garage List
2008 BMW M3  [7.90]
I witnessed it all...
Eloy dynoed the car stock, threw it on the lift, reversed onto the dyno.

Now that is some real power.
__________________
Current: 16 991 GT3RS , 91 964 C2, 17 Raptor | Past: 2015 991 GT3, 2015 i3,15 YMB F80 M3, 13 E92 M3 DCT, 08 E92 M3 6MT, 07 E60 M5, 02 E46 M3
Instagram: @josh_speeddistrict #SpeedDistrict @SpeedDistrict
Appreciate 0
      03-10-2009, 03:22 PM   #7
RPIpower
Captain
RPIpower's Avatar
54
Rep
861
Posts

Drives: F97 X3M, G80 M3
Join Date: Aug 2007
Location: PA

iTrader: (0)

Dont let people tell you that the "car needs to learn" or that the "ecu needs to reset". Im always suspicious when I put a mod on my car and when I dont see the numbers I want, they tell me that there is a learning period. If the part is going to make power, youll see it, esp when its a hardware change. Now, does the ecu learn? Yes, but its not drastic like some people might think. For example, we usually see the power gains after the first 2-3 dyno pulls.
Appreciate 0
      03-10-2009, 03:47 PM   #8
Bx Tpr
Captain
Bx Tpr's Avatar
124
Rep
891
Posts

Drives: 23 CSL
Join Date: Feb 2009
Location: NY

iTrader: (8)

Quote:
Originally Posted by RPIpower View Post
Dont let people tell you that the "car needs to learn" or that the "ecu needs to reset". Im always suspicious when I put a mod on my car and when I dont see the numbers I want, they tell me that there is a learning period. If the part is going to make power, youll see it, esp when its a hardware change. Now, does the ecu learn? Yes, but its not drastic like some people might think. For example, we usually see the power gains after the first 2-3 dyno pulls.
Are these gains after or before tuning?

Awesome gains and it sounds like an awesome package both quality and price wise!

PM Sent
Appreciate 0
      03-10-2009, 05:20 PM   #9
vegastrashed
Private First Class
1
Rep
102
Posts

Drives: ricksaw
Join Date: Sep 2006
Location: Socal

iTrader: (0)

Quote:
Originally Posted by Bx Tpr View Post
Are these gains after or before tuning?

Awesome gains and it sounds like an awesome package both quality and price wise!

PM Sent
Jimmy's dyno was with the stock tune.
Appreciate 0
      03-10-2009, 06:52 PM   #10
RPIpower
Captain
RPIpower's Avatar
54
Rep
861
Posts

Drives: F97 X3M, G80 M3
Join Date: Aug 2007
Location: PA

iTrader: (0)

Quote:
Originally Posted by Bx Tpr View Post
Are these gains after or before tuning?

Awesome gains and it sounds like an awesome package both quality and price wise!

PM Sent
Absolutely no tune and this was all done on a Dyno Dynamics, not an inertia dyno.
Appreciate 0
      03-10-2009, 07:05 PM   #11
Sticky
Banned
United_States
79
Rep
2,244
Posts

Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu

iTrader: (0)

Quote:
Originally Posted by RPIpower View Post
Dont let people tell you that the "car needs to learn" or that the "ecu needs to reset". Im always suspicious when I put a mod on my car and when I dont see the numbers I want, they tell me that there is a learning period. If the part is going to make power, youll see it, esp when its a hardware change. Now, does the ecu learn? Yes, but its not drastic like some people might think. For example, we usually see the power gains after the first 2-3 dyno pulls.
+1, the learning excuse is a way for some guys to cover themselves if/when the gains don't show... won't name names.
Appreciate 0
      03-10-2009, 07:13 PM   #12
Sticky
Banned
United_States
79
Rep
2,244
Posts

Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu

iTrader: (0)

Quote:
Originally Posted by jimmyeatsworld View Post

Sound wise, I like it. It is loud. To describe what it sounds like, I think it has 2 tones to it. It has that deep low tone at take off/low rpm, then a higher pitch a little bit raspy scream at WOT, and there is little drone. Personally, I think it sounds better in person. The week before the install, I had my buddies hear the exhaust from the Youtube clips, and one of them didn't like it. That changed when he heard it in person that day, and says the clips don't do justice.
I agree with this completely. No offense to anyone, but I did not like the sound with the Youtube clips. I didn't want something just LOUD and deep. In person, I agree with everything you said, at the top end it has that slight exotic rasp to it while conveying that muscular/strong V8 presence. The clips do not do it justice, hearing it in person settled it, one rev is all it took.
Appreciate 0
      03-10-2009, 07:46 PM   #13
d_dot
4 * General
d_dot's Avatar
United_States
59
Rep
644
Posts

Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

iTrader: (0)

how much $$$?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
Appreciate 0
      03-10-2009, 08:42 PM   #14
SoCalM3Mang
"Makin It Happen-West Coast Style"
SoCalM3Mang's Avatar
United_States
43
Rep
184
Posts

Drives: 2008 E93 Jerez Black 6SPD
Join Date: Feb 2009
Location: So Cal

iTrader: (0)

Quote:
Originally Posted by d_dot View Post
how much $$$?
For you.....

"2 MEEEEELLION DOLLARS" but that includes Dyno and install!


It doesn't matter what it costs. It's worth it.

Holla!
__________________
08 BMW E93 6MT Jerez Black|HAMANN-ed|Lots of Carbon Fiber|Eibach E-93 Sprgs|Advan RS-D's 19x9+22/19x10+20|AA-SSK-Pulley|RPI Scoops-Red|RPI Axle Back Exhaust- Blacked Out Tips|Hamann Rep CF Lip-Diffuser-Trunk Spoiler||Hamaan Badging
Appreciate 0
      03-10-2009, 09:27 PM   #15
LateBraking
Brigadier General
United_States
332
Rep
3,881
Posts

Drives: Relatively Quick.
Join Date: Sep 2008
Location: U.S.A.

iTrader: (27)

Prices of everything they offer here.

http://shoprpi.com/index.php?cPath=21_22_30_42
Appreciate 0
      03-10-2009, 11:55 PM   #16
PPINESM3
Private First Class
PPINESM3's Avatar
United_States
10
Rep
103
Posts

Drives: e92 alpine M3
Join Date: May 2008
Location: Pembroke Pines FL

iTrader: (0)

Quote:
Originally Posted by Sticky View Post
I agree with this completely. No offense to anyone, but I did not like the sound with the Youtube clips. I didn't want something just LOUD and deep. In person, I agree with everything you said, at the top end it has that slight exotic rasp to it while conveying that muscular/strong V8 presence. The clips do not do it justice, hearing it in person settled it, one rev is all it took.
Sticky when are you getting yours. Would love to hear your review for us guys in south florida. Thanks
Appreciate 0
      03-10-2009, 11:57 PM   #17
Sticky
Banned
United_States
79
Rep
2,244
Posts

Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu

iTrader: (0)

Quote:
Originally Posted by PPINESM3 View Post
Sticky when are you getting yours. Would love to hear your review for us guys in south florida. Thanks
I considered camping out in front of RPI, but Eloy has a hose.

Probably 2 weeks max.
Appreciate 0
      03-11-2009, 12:40 AM   #18
MrHarris
yodog
MrHarris's Avatar
United_States
201
Rep
5,024
Posts

Drives: '86 Corolla
Join Date: Jun 2007
Location: Diamond Bar, Ca

iTrader: (5)

Garage List
2009 BMW  [10.00]
Quote:
Originally Posted by PPINESM3 View Post
Sticky when are you getting yours. Would love to hear your review for us guys in south florida. Thanks
+1 except i'm not from south florida
__________________

2009 E92 M3 | Alpine White | Black Extended | Advan RS | Turner Test Pipes | Dinan Axle-Back | OETuning | Eibach Springs | UUC SSK | VRS Front Lip | VRS Type I Diffuser | Matte Black | RPi Scoops | MS Filter | Yokohama AD08 | F1 Pinnacle
Special Thanks: Gintani | OETuning | eAs
Appreciate 0
      03-11-2009, 12:44 AM   #19
Sticky
Banned
United_States
79
Rep
2,244
Posts

Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu

iTrader: (0)

Actually just got word my exhaust is ready and waiting, damn that was FAST!

My car is sitting without its diff though, waiting for it to come in.
Appreciate 0
      03-11-2009, 03:05 AM   #20
MrHarris
yodog
MrHarris's Avatar
United_States
201
Rep
5,024
Posts

Drives: '86 Corolla
Join Date: Jun 2007
Location: Diamond Bar, Ca

iTrader: (5)

Garage List
2009 BMW  [10.00]
When just revving normally (2.5-3k rpm), is it loud enough to where cops would pull you over?
__________________

2009 E92 M3 | Alpine White | Black Extended | Advan RS | Turner Test Pipes | Dinan Axle-Back | OETuning | Eibach Springs | UUC SSK | VRS Front Lip | VRS Type I Diffuser | Matte Black | RPi Scoops | MS Filter | Yokohama AD08 | F1 Pinnacle
Special Thanks: Gintani | OETuning | eAs
Appreciate 0
      03-11-2009, 03:06 AM   #21
MrHarris
yodog
MrHarris's Avatar
United_States
201
Rep
5,024
Posts

Drives: '86 Corolla
Join Date: Jun 2007
Location: Diamond Bar, Ca

iTrader: (5)

Garage List
2009 BMW  [10.00]
Quote:
Originally Posted by Sticky View Post
I considered camping out in front of RPI, but Eloy has a hose.

Probably 2 weeks max.
Sticky, when you get the new diff and exhaust please go to the drag strip again and see what times you get
__________________

2009 E92 M3 | Alpine White | Black Extended | Advan RS | Turner Test Pipes | Dinan Axle-Back | OETuning | Eibach Springs | UUC SSK | VRS Front Lip | VRS Type I Diffuser | Matte Black | RPi Scoops | MS Filter | Yokohama AD08 | F1 Pinnacle
Special Thanks: Gintani | OETuning | eAs
Appreciate 0
      03-11-2009, 03:13 AM   #22
Sticky
Banned
United_States
79
Rep
2,244
Posts

Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu

iTrader: (0)

Quote:
Originally Posted by MrHarris View Post
Sticky, when you get the new diff and exhaust please go to the drag strip again and see what times you get
Try and stop me!
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 05:53 PM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST