RPI GT Race exhaust...

mpower03 · 01-06-2009, 05:57 PM

wow thats great 600-700 dollars and 3.25 inch tips

RPIpower · 01-06-2009, 06:12 PM

Quote:

Originally Posted by 03BeastCharmer

By staggered do you mean staggered tip diameter (like in the photo on page 1), or tip length to flow with the body lines? I've been waiting for 5 months, I guess I can wait a little longer. Hoe you get some test cars soon.

BTW - When are the scoops supposed to be off back order?

Scoops are in stock and ready to ship. Black ones are shipping usually the same day of the order and red ones are +1-2 days.

Quote:

Originally Posted by mpower03

are the tips on both muffler going to be 3 1/4 inch like said on page 2?

We are trying to get 3.5" tips in there. The tips we were using were straight out of out opel and porsche exhaust which helped keep the cost down. Our initial prototype yeilded 19-20hours of labor for just the tips alone so they really are nice. The tips are actually 8 pipes (4 per side). The inside pipes are flared out then the edges are welded to the outside pipe/tip. The welds are then grinded down and then polished. The sound and look is there. Our main concern now is just the power.

mpower03 · 01-06-2009, 06:17 PM

Quote:

Originally Posted by RPIpower

Scoops are in stock and ready to ship. Black ones are shipping usually the same day of the order and red ones are +1-2 days.

We are trying to get 3.5" tips in there. The tips we were using were straight out of out opel and porsche exhaust which helped keep the cost down. Our initial prototype yeilded 19-20hours of labor for just the tips alone so they really are nice. The tips are actually 8 pipes (4 per side). The inside pipes are flared out then the edges are welded to the outside pipe/tip. The welds are then grinded down and then polished. The sound and look is there. Our main concern now is just the power.

how are there 4 tips per side at 3.5 inches. Would 3.5 inch pipes be too close to the bumper and would it burn it. do you have pictures of the tips. Have you done dyno testing? It is mufflers right, not staight pipes? Is there an x pipe available? sorry for all the questions just wondering though.

RPIpower · 01-06-2009, 06:36 PM

Quote:

Originally Posted by mpower03

how are there 4 tips per side at 3.5 inches. Would 3.5 inch pipes be too close to the bumper and would it burn it. do you have pictures of the tips. Have you done dyno testing? It is mufflers right, not staight pipes? Is there an x pipe available? sorry for all the questions just wondering though.

The larger tip is 3.5 while the staggered smaller tip (on the outside will be 3"). Here are the tips we are using: http://www.6speedonline.com/forums/2003565-post2.html
Yes we have done dyno testing. We ALWAYS dyno test EVERYTHING. Thats why we are looking for a few more local Z4s to dyno so we can confirm the results on multiple cars and not just one car. At this time, it is the rear section only. The X-pipe is not always going to be beneficial for all cars. I think its a great way to "market" something since the X-pipe bandwagon has been full for a while. We tried an x-pipe for the M5 last year and it dropped about 15-20whp.

mpower03 · 01-06-2009, 06:46 PM

Quote:

Originally Posted by RPIpower

The larger tip is 3.5 while the staggered smaller tip (on the outside will be 3"). Here are the tips we are using: http://www.6speedonline.com/forums/2003565-post2.html
Yes we have done dyno testing. We ALWAYS dyno test EVERYTHING. Thats why we are looking for a few more local Z4s to dyno so we can confirm the results on multiple cars and not just one car. At this time, it is the rear section only. The X-pipe is not always going to be beneficial for all cars. I think its a great way to "market" something since the X-pipe bandwagon has been full for a while. We tried an x-pipe for the M5 last year and it dropped about 15-20whp.

so are you going to sell two tip style, one with all 4 tips at 3.25 and another with 2 at 3.5 and 2 at 3?

RPIpower · 01-06-2009, 07:06 PM

Quote:

Originally Posted by mpower03

so are you going to sell two tip style, one with all 4 tips at 3.25 and another with 2 at 3.5 and 2 at 3?

The final production will ONLY be available with one tip configuration. What that will be is not decided yet. Our main concern is the hp right now. When we develope an exhaust, the priorities are as follows.

- HP
- Sound
- Cosmetic

mpower03 · 01-06-2009, 07:10 PM

Quote:

Originally Posted by RPIpower

The final production will ONLY be available with one tip configuration. What that will be is not decided yet. Our main concern is the hp right now. When we develope an exhaust, the priorities are as follows.

- HP
- Sound
- Cosmetic

as long as the tips are the same size id be in if the price is good.

Palantirion · 01-06-2009, 07:27 PM

Quote:

Originally Posted by RPIpower

We tried an x-pipe for the M5 last year and it dropped about 15-20whp.

-Was that on an E39 or an E60?

wyu177 · 01-06-2009, 10:31 PM

Quote:

Originally Posted by mpower03

as long as the tips are the same size id be in if the price is good.

yes same here!

RPIpower · 01-07-2009, 04:17 PM

Quote:

Originally Posted by Palantirion

-Was that on an E39 or an E60?

E60

Quote:

Originally Posted by wyu177

yes same here!

We do everything we can to keep pricing down and offer a great value to our customers.

mpower03 · 01-07-2009, 04:51 PM

when is the prjected launch date for the exhaust?

RPIpower · 01-07-2009, 05:09 PM

Quote:

Originally Posted by mpower03

when is the prjected launch date for the exhaust?

Well, we need to have the original exhaust back from Laidback but because of the busy schedule, he has not been able to come in for us to take it off for further testing.

laidback · 01-08-2009, 11:34 AM

E,

So sorry for the delay been busy getting Mfest ready for April but i'll call you today and give you the car so you can test it before F/I

Quote:

Originally Posted by RPIpower

Well, we need to have the original exhaust back from Laidback but because of the busy schedule, he has not been able to come in for us to take it off for further testing.

RPIpower · 01-08-2009, 03:00 PM

Quote:

Originally Posted by laidback

E,

So sorry for the delay been busy getting Mfest ready for April but i'll call you today and give you the car so you can test it before F/I

Its all good man. I know you are busy pimpin. haha. I gave the stock mufflers to Q so hes much closer to you than we are. If you can, please swing by his shop and he will swap them out so I can get that jig made up as soon as we confirm the dyno numbers with another car.

laidback · 01-08-2009, 03:29 PM

Will do i'll swap it this week...QUOTE=RPIpower;3918175]Its all good man. I know you are busy pimpin. haha. I gave the stock mufflers to Q so hes much closer to you than we are. If you can, please swing by his shop and he will swap them out so I can get that jig made up as soon as we confirm the dyno numbers with another car.[/QUOTE]

Nate2046 · 01-08-2009, 08:47 PM

Quote:

Originally Posted by RPIpower

If all goes well with the final testing, we are expecting a retail price for around $600-700 (depending on the tip design). We have been told by several of you that you guys wanted to keep the same GT staggered tip design that is on Laidback's car. That is a definite option but would raise the price a little bit.

If you can deliver in the stated price range I would pay today with some reasonable guarantee of a delivery date. At the very least I would be willing to make a deposit if you guys want to get a GB going. BTW, I very much prefer the look of equal sized tips, staggered in the valence like the stock ones. The staggered diameter tips seem a little 'gimmicky' to me.

tintboy · 01-08-2009, 09:03 PM

I think the exhaust looks sick

. Would the cans be able to to bolt up to the super sprint x pipe. If so i would definitely rock it.

RPIpower · 01-09-2009, 06:27 PM

Quote:

Originally Posted by Nate2046

If you can deliver in the stated price range I would pay today with some reasonable guarantee of a delivery date. At the very least I would be willing to make a deposit if you guys want to get a GB going. BTW, I very much prefer the look of equal sized tips, staggered in the valence like the stock ones. The staggered diameter tips seem a little 'gimmicky' to me.

No need for a deposit but the price will be close to as targetted. We cant guarantee a delivery date. AS you can see, we are even having delays trying to get our original prototype back. (cough cough.laidback. LOL)

Quote:

Originally Posted by tintboy

I think the exhaust looks sick

. Would the cans be able to to bolt up to the super sprint x pipe. If so i would definitely rock it.

The rear will bolt to the stock flanges. If the SS x-pipe bolts to the stock rear mufflers, than it might bolt on with no problem. There are no guarantees of performance with the SS x-pipe though.

superbow · 01-10-2009, 05:07 PM

I would only be interested if all pipes were the same diameter.............

Alpine M · 01-13-2009, 10:07 PM

Eloy,

I can drop my car off to help out ... I'm back from Vegas (CES) and hopefully in town for the rest of the month now ... let me know what works for you

Jim

03BeastCharmer · 01-14-2009, 10:07 AM

Quote:

Originally Posted by Alpine M

Eloy,

I can drop my car off to help out ... I'm back from Vegas (CES) and hopefully in town for the rest of the month now ... let me know what works for you

Jim

hopefully this means we can get these tested and produced

RPIpower · 01-14-2009, 06:12 PM

Pricing has been set to $660 pending dyno results. This is an axle back exhaust set up.

01-06-2009, 05:57 PM	#155
mpower03 Captain 39 Rep 962 Posts Drives: 08 z4 M Coupe Join Date: Sep 2008 Location: FL iTrader: (2)	wow thats great 600-700 dollars and 3.25 inch tips __________________
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01-07-2009, 04:51 PM	#165
mpower03 Captain 39 Rep 962 Posts Drives: 08 z4 M Coupe Join Date: Sep 2008 Location: FL iTrader: (2)	when is the prjected launch date for the exhaust? __________________
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01-08-2009, 03:29 PM	#169
laidback Lieutenant Colonel 137 Rep 1,709 Posts Drives: M's Join Date: Jul 2007 Location: SoCal iTrader: (0)	Will do i'll swap it this week...QUOTE=RPIpower;3918175]Its all good man. I know you are busy pimpin. haha. I gave the stock mufflers to Q so hes much closer to you than we are. If you can, please swing by his shop and he will swap them out so I can get that jig made up as soon as we confirm the dyno numbers with another car.[/QUOTE] __________________ Live as if you will die tomorrow, but learn as if you will live forever." M.G
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01-08-2009, 09:03 PM	#171
tintboy Second Lieutenant 52 Rep 262 Posts Drives: 2011 E92 M3 Join Date: Aug 2007 Location: NJ iTrader: (3)	I think the exhaust looks sick . Would the cans be able to to bolt up to the super sprint x pipe. If so i would definitely rock it. __________________ Present 2022 M5 CS FROZEN BH PAST~2011 E92M3 Space Grey Gintani STAGE X
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01-10-2009, 05:07 PM	#173
superbow Private First Class 48 Rep 199 Posts Drives: soon to be 440iM Sport Coupe Join Date: Feb 2008 Location: North Yorkshire England iTrader: (2)	I would only be interested if all pipes were the same diameter............. __________________ soon to be 440i M Coupe
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01-13-2009, 10:07 PM	#174
Alpine M Private First Class 12 Rep 118 Posts Drives: Silver/Red Z4MC Join Date: Oct 2007 Location: Manhattan Beach iTrader: (1)	Eloy, I can drop my car off to help out ... I'm back from Vegas (CES) and hopefully in town for the rest of the month now ... let me know what works for you Jim
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01-14-2009, 06:12 PM	#176
RPIpower Captain 49 Rep 857 Posts Drives: F97 X3M, G80 M3 Join Date: Aug 2007 Location: PA iTrader: (0)	Pricing has been set to $660 pending dyno results. This is an axle back exhaust set up.
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