RPI Full GT Exhaust Review/Dyno

jimmyeatsworld · 03-10-2009, 12:20 PM

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.

McLuVan · 03-10-2009, 12:23 PM

24RWHP!??!?!?!1
holy smokes!

jimmyeatsworld · 03-10-2009, 12:28 PM

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.

McLuVan · 03-10-2009, 12:29 PM

Quote:

Originally Posted by jimmyeatsworld

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!

///M PWR 00 · 03-10-2009, 12:52 PM

Awesome gains! I am so impressed with RPIs work thus far.... any video footage?

tightie · 03-10-2009, 02:28 PM

I witnessed it all...
Eloy dynoed the car stock, threw it on the lift, reversed onto the dyno.

Now that is some real power.

RPIpower · 03-10-2009, 03:22 PM

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.

Bx Tpr · 03-10-2009, 03:47 PM

Quote:

Originally Posted by RPIpower

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

vegastrashed · 03-10-2009, 05:20 PM

Quote:

Originally Posted by Bx Tpr

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.

RPIpower · 03-10-2009, 06:52 PM

Quote:

Originally Posted by Bx Tpr

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.

Sticky · 03-10-2009, 07:05 PM

Quote:

Originally Posted by RPIpower

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.

Sticky · 03-10-2009, 07:13 PM

Quote:

Originally Posted by jimmyeatsworld

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.

d_dot · 03-10-2009, 07:46 PM

how much $$$?

SoCalM3Mang · 03-10-2009, 08:42 PM

Quote:

Originally Posted by d_dot

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!

LateBraking · 03-10-2009, 09:27 PM

Prices of everything they offer here.

http://shoprpi.com/index.php?cPath=21_22_30_42

PPINESM3 · 03-10-2009, 11:55 PM

Quote:

Originally Posted by Sticky

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

Sticky · 03-10-2009, 11:57 PM

Quote:

Originally Posted by PPINESM3

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.

MrHarris · 03-11-2009, 12:40 AM

Quote:

Originally Posted by PPINESM3

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

Sticky · 03-11-2009, 12:44 AM

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.

MrHarris · 03-11-2009, 03:05 AM

When just revving normally (2.5-3k rpm), is it loud enough to where cops would pull you over?

MrHarris · 03-11-2009, 03:06 AM

Quote:

Originally Posted by Sticky

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

Sticky · 03-11-2009, 03:13 AM

Quote:

Originally Posted by MrHarris

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!

03-10-2009, 12:20 PM	#1
jimmyeatsworld Second Lieutenant Drives: 2008 E92 M3 6MT Join Date: Nov 2008 Location: Orange County Posts: 206 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
	Tweet

03-10-2009, 12:52 PM	#5
///M PWR 00 Captain Drives: Porsche Join Date: Mar 2008 Location: Yonkers, NY Posts: 938 iTrader: (0)	Awesome gains! I am so impressed with RPIs work thus far.... any video footage? __________________

03-10-2009, 02:28 PM	#6
tightie JOSH SHOKRI. Drives: 2013 E92 Coupe. Join Date: Aug 2005 Location: los angeles, california. Posts: 4,830 iTrader: (7) Garage List 2008 BMW M3 [3.85]	I witnessed it all... Eloy dynoed the car stock, threw it on the lift, reversed onto the dyno. Now that is some real power. __________________ Speed District >> Past: 08 6MT E92 Matte Blue Gintani Supercharged - Present: 13 DCT E92 California Members Speed District M3 Track Days: May 31, 2012 @ Willow Springs Raceway (Road Course)

03-10-2009, 07:46 PM	#13
d_dot 4 * General Drives: E92 M3 & 335,F10 535xi,Audi R8 Join Date: Dec 2007 Location: Tri-State Posts: 621 iTrader: (0)	how much $$$? __________________ Nissan GT-R (Sold) When Driving Nice Whips It Helps To Have Nice Kix!

03-10-2009, 09:27 PM	#15
LateBraking BMW and reliability....haha.... Drives: Something reliable. Join Date: Sep 2008 Location: Pacific Standard Time Posts: 3,878 iTrader: (27)	Prices of everything they offer here. http://shoprpi.com/index.php?cPath=21_22_30_42 __________________ "As I lay rubber down the street, I pray for traction I can keep. But If I spin and begin to slide, please dear God protect my ride! Amen." ― ONEBADWS6, LS1TECH.com Member

03-10-2009, 12:23 PM	#2
McLuVan Lieutenant General Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ Posts: 13,121 iTrader: (1)	24RWHP!??!?!?!1 holy smokes!

03-10-2009, 12:28 PM	#3
jimmyeatsworld Second Lieutenant Drives: 2008 E92 M3 6MT Join Date: Nov 2008 Location: Orange County Posts: 206 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.

03-10-2009, 03:22 PM	#7
RPIpower Captain Drives: 135i, 996tt, e60 M5, tundra Join Date: Aug 2007 Location: So Cal Posts: 665 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.

03-11-2009, 12:44 AM	#19
Sticky Banned Drives: E92 Jerez DCT M3 Join Date: Jan 2008 Location: Anaheim Hills / Malibu Posts: 2,244 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.

03-11-2009, 03:05 AM	#20
MrHarris yodog Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca Posts: 5,032 iTrader: (5) Garage List 2009 BMW [5.00]	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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search