RENN Spec | RPI 135i Quad Exhaust System Group Buy Pricing!! - Page 4 - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)

RPIpower · 12-07-2009, 05:46 PM

Quote:

Originally Posted by ridin135

Has anyone went to at least take a drive in this. I would put this on my car in a heart beat to dyno test it if I was anywhere near them. Would be interesting to see what these do with catless downpipes

Ive been asking but no one has been able to. I talked to Mike @ southbay bmw and hes going to drop off his car so I can dyno it this week. His car is stock except for some tune he got from a company in NY. Either way, it would be a good comparison.

BimmerBoi2100 · 12-07-2009, 11:17 PM

I definately like the look of the exhaust....if it does anything close to what you say it does..I'm buyin

solid77 · 12-08-2009, 01:02 AM

ya it looks sweet... since the part for the diffuser is only $50 will you offer precut pieces that match the oem exhaust side 100%? i'd rather pay a little extra for a precut piece that will be 100% than risk a local shop screwing it up and not look clean... plus the added hassle of having to reorder another one and get it cut again...

RPIpower · 12-08-2009, 01:05 PM

Quote:

Originally Posted by solid77

ya it looks sweet... since the part for the diffuser is only $50 will you offer precut pieces that match the oem exhaust side 100%? i'd rather pay a little extra for a precut piece that will be 100% than risk a local shop screwing it up and not look clean... plus the added hassle of having to reorder another one and get it cut again...

Quote:

Originally Posted by BimmerBoi2100

I definately like the look of the exhaust....if it does anything close to what you say it does..I'm buyin

Thanks for your intellegent posts.

That was the whole idea about making the exhaust like this. We didnt want you to have to pay $3500 for an AXLE back (some companies do that), and then spent a few hundred more to buy their rear diffuser which is needed for their exhaust to fit. Thats just ridiculous. Behind the bumper, there is a canister and some other plastic parts. Because of this, we had to make actual manifold or exhaust distribution blocks behind the tips so that the heat coming from the exhaust doesnt cause any problems with the components under your trunk.

I have received some PMs from people offering their cars for testing so this is great news. I will offer a HEAVY discount and free labor for the test subject when our exhaust is released.

Simon_135i · 12-08-2009, 01:15 PM

I know this is only a pre-production model but if anything I suggest you look at the tips and how far they are sticking out. If it can be reduce, due narrow depth of the tip assembly being seen when looking at it from the side.

I actually wouldn't of minded driving to you guys since my car is practically stock with a JB+ which can be easily removed. I too was looking for a QUAD and made the purchase already with another vendor. Unfortunately, I am still waiting for the product to arrive. If that falls through, I may give you guys a PM.

RPIpower · 12-08-2009, 01:30 PM

Quote:

Originally Posted by Simon_135i

I know this is only a pre-production model but if anything I suggest you look at the tips and how far they are sticking out. If it can be reduce, due narrow depth of the tip assembly being seen when looking at it from the side.

I actually wouldn't of minded driving to you guys since my car is practically stock with a JB+ which can be easily removed. I too was looking for a QUAD and made the purchase already with another vendor. Unfortunately, I am still waiting for the product to arrive. If that falls through, I may give you guys a PM.

The tips move out about 3/4" when the car warms up so it does come out a little bit. We made a set of tips that were shorter but I didnt like how it looked because you can see too much of the manifolds behind the tips. Remember, this was done on a stock diffuser. I will work with Peter at VST to make a much better diffuser so that the tips will look more "tucked". Also, it might be the angle of the pics we took too. The tips really look nice and we have received a lot of compliments on it so far (in person).

RPIpower · 12-08-2009, 01:38 PM

Good news. We have someone coming in at 9:30 on Thursday to do dyno testing. Who ever wants to come and watch can.

RPIpower · 12-09-2009, 06:46 PM

Ok, well, the appointment flaked on us so we are still looking for another car to dyno test.

BimmerBoi2100 · 12-11-2009, 10:51 AM

Are u guys working on a diffuser as well?

Jason@Renn-Spec · 12-11-2009, 02:44 PM

Yes, Eloy will be working with Vorsteiner on making a nice diffuser for it. In the meanwhile, the only solution will be to cut the OEM piece.

BimmerBoi2100 · 12-11-2009, 03:48 PM

LOL i hope they don't design something too gaudy. how bout a military discount? i'm more than likely gonna wait til the diffuser comes out before i get the exhaust. Are ya'll gonna design some downpipes too?

RPIpower · 12-11-2009, 04:07 PM

Quote:

Originally Posted by BimmerBoi2100

LOL i hope they don't design something too gaudy. how bout a military discount? i'm more than likely gonna wait til the diffuser comes out before i get the exhaust. Are ya'll gonna design some downpipes too?

Its a different thing than this gb but RPi does offer USAA member discounts. Im running the exhaust with the stock diffuser right now. I like it

bulldog x6 · 12-11-2009, 05:52 PM

so where is the dyno?

BimmerBoi2100 · 12-12-2009, 04:05 AM

so is that a yea or a nea on the down pipes?...lol and what's that % on the usaa discount cuz..I'm a member

RPIpower · 12-14-2009, 02:53 PM

Quote:

Originally Posted by turkish335

so where is the dyno?

Guy was a no show. I have another car scheduled to come in tomorrow. We'll see if the same thing happens.

Quote:

Originally Posted by BimmerBoi2100

so is that a yea or a nea on the down pipes?...lol and what's that % on the usaa discount cuz..I'm a member

Give us a call 562-630-5966

BimmerBoi2100 · 12-14-2009, 03:08 PM

Um i'd love to call but i'm trapped in the Iraqi desert til May...my email address is TimLDynamite@gmail.com.

ridin135 · 12-15-2009, 12:36 PM

If I had 3 grand to spend I would try it out. By the way is the one pipe 3.5" or greater, if it is you did your homework

RPIpower · 12-15-2009, 03:27 PM

FINALLY got a car to dyno.

This car is different and does NOT have the ESS tune. We were only able to get about 32whp. Its not 40hp, but the gains are still pretty impressive. The guy might try out the ESS tune and see how it goes.

RPIpower · 12-15-2009, 03:28 PM

BTW, I got a chance to do weight comparisons also. The stock exhaust is 61lbs and the full RPi GT is 46lbs.

deamon32 · 12-15-2009, 04:23 PM

Quote:

Originally Posted by RPIpower

BTW, I got a chance to do weight comparisons also. The stock exhaust is 61lbs and the full RPi GT is 46lbs.

Some nice dynos, glad you guys got around to getting these up. Cant wait for the final product although the price is still a major factor but I may spend that for a good quality quad system...

ridin135 · 12-15-2009, 05:03 PM

what was done to the car and what is a vm tune

RPIpower · 12-15-2009, 05:09 PM

Quote:

Originally Posted by ridin135

what was done to the car and what is a vm tune

The car is stock except some a tune from a company named VM. I have no clue who that is and I never heard of them so I have no affiliation with that company. It was the closest car to stock I could get. Baseline dynos were pretty consistent so we were able to dyno the exhaust on his car. The power gains were consistently from 28-34whp in the mid range. The only thing I can think of why I got the 40+hp was from the tune and the ram air. They might have made a difference with the stock and aftermarket exhaust.

12-15-2009, 12:36 PM	#83
ridin135 Lieutenant Colonel Drives: 2013 AW M3 Join Date: Dec 2008 Location: Greenville Posts: 1,774 iTrader: (7)	If I had 3 grand to spend I would try it out. By the way is the one pipe 3.5" or greater, if it is you did your homework Last edited by ridin135; 12-15-2009 at 12:54 PM.

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12-07-2009, 11:17 PM	#68
BimmerBoi2100 Private First Class Drives: 2009 Black 135i Join Date: Jul 2007 Location: Da Desert Posts: 144 iTrader: (0)	I definately like the look of the exhaust....if it does anything close to what you say it does..I'm buyin

12-08-2009, 01:02 AM	#69
solid77 Private First Class Drives: 2010 135i Join Date: Oct 2009 Location: seattle, wa Posts: 148 iTrader: (3)	ya it looks sweet... since the part for the diffuser is only $50 will you offer precut pieces that match the oem exhaust side 100%? i'd rather pay a little extra for a precut piece that will be 100% than risk a local shop screwing it up and not look clean... plus the added hassle of having to reorder another one and get it cut again...

12-08-2009, 01:15 PM	#71
Simon_135i Collecting dust! Drives: 135i Join Date: Apr 2008 Location: San Diego Posts: 1,987 iTrader: (6) Garage List 2008 E82/135i [0.00]	I know this is only a pre-production model but if anything I suggest you look at the tips and how far they are sticking out. If it can be reduce, due narrow depth of the tip assembly being seen when looking at it from the side. I actually wouldn't of minded driving to you guys since my car is practically stock with a JB+ which can be easily removed. I too was looking for a QUAD and made the purchase already with another vendor. Unfortunately, I am still waiting for the product to arrive. If that falls through, I may give you guys a PM.

12-08-2009, 01:38 PM	#73
RPIpower Captain Drives: 135i, 996tt, e60 M5, tundra Join Date: Aug 2007 Location: So Cal Posts: 665 iTrader: (0)	Good news. We have someone coming in at 9:30 on Thursday to do dyno testing. Who ever wants to come and watch can.

12-09-2009, 06:46 PM	#74
RPIpower Captain Drives: 135i, 996tt, e60 M5, tundra Join Date: Aug 2007 Location: So Cal Posts: 665 iTrader: (0)	Ok, well, the appointment flaked on us so we are still looking for another car to dyno test.

12-11-2009, 10:51 AM	#75
BimmerBoi2100 Private First Class Drives: 2009 Black 135i Join Date: Jul 2007 Location: Da Desert Posts: 144 iTrader: (0)	Are u guys working on a diffuser as well?

12-11-2009, 02:44 PM	#76
Jason@Renn-Spec Major Drives: A POS Join Date: Jul 2009 Location: La Puente, CA Posts: 1,312 iTrader: (3)	Yes, Eloy will be working with Vorsteiner on making a nice diffuser for it. In the meanwhile, the only solution will be to cut the OEM piece.

12-11-2009, 03:48 PM	#77
BimmerBoi2100 Private First Class Drives: 2009 Black 135i Join Date: Jul 2007 Location: Da Desert Posts: 144 iTrader: (0)	LOL i hope they don't design something too gaudy. how bout a military discount? i'm more than likely gonna wait til the diffuser comes out before i get the exhaust. Are ya'll gonna design some downpipes too?

12-11-2009, 05:52 PM	#79
bulldog x6 Major General Drives: x6 panzer Join Date: Oct 2008 Location: probably work Posts: 5,021 iTrader: (28)	so where is the dyno?

12-12-2009, 04:05 AM	#80
BimmerBoi2100 Private First Class Drives: 2009 Black 135i Join Date: Jul 2007 Location: Da Desert Posts: 144 iTrader: (0)	so is that a yea or a nea on the down pipes?...lol and what's that % on the usaa discount cuz..I'm a member

12-14-2009, 03:08 PM	#82
BimmerBoi2100 Private First Class Drives: 2009 Black 135i Join Date: Jul 2007 Location: Da Desert Posts: 144 iTrader: (0)	Um i'd love to call but i'm trapped in the Iraqi desert til May...my email address is TimLDynamite@gmail.com.

12-15-2009, 03:27 PM	#84
RPIpower Captain Drives: 135i, 996tt, e60 M5, tundra Join Date: Aug 2007 Location: So Cal Posts: 665 iTrader: (0)	FINALLY got a car to dyno. This car is different and does NOT have the ESS tune. We were only able to get about 32whp. Its not 40hp, but the gains are still pretty impressive. The guy might try out the ESS tune and see how it goes.

12-15-2009, 03:28 PM	#85
RPIpower Captain Drives: 135i, 996tt, e60 M5, tundra Join Date: Aug 2007 Location: So Cal Posts: 665 iTrader: (0)	BTW, I got a chance to do weight comparisons also. The stock exhaust is 61lbs and the full RPi GT is 46lbs.

12-15-2009, 05:03 PM	#87
ridin135 Lieutenant Colonel Drives: 2013 AW M3 Join Date: Dec 2008 Location: Greenville Posts: 1,774 iTrader: (7)	what was done to the car and what is a vm tune