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Discussion Starter · #1 ·
I am teaming up with some friends to figure out how much this will be to do and then fabricating it up onto my car, dynoing before/ after the install, materials to use, different bungs and wraps we could use. This will be a turbo back exhaust so you would be getting a down pipe and cat back exhaust.<p>Need to do more research on a couple of things like engine codes being thrown and cat on or straight pipe, mufflers, etc...<p>I want to keep the price to under a grand, I am sick of seeing people buy exhaust systems that are 1500+ dollars and getting the same performance from something that is half as much money. I built my own exhaust for 300 dollars for my Talon back in the day and it had just as good of results as any other turbo back.<p>So after that who would be interested in this? If there is enough interest I'm sure it can be done.<p>Thanks,<p>-Colin
 

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Colin once you string together the dyno numbers, you may have some good response. However, it would be interesting to see what kinda feedback Phuz could give you - he has a good option and his costs a dime.. what do you think you can do different?<p>I'm honestly curious, not trying to be combative <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0">
 

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LOL, I'm always interested in something that is high quality and low price. Sounds like you are thinking in the right direction doing research and checking with people here.
 

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Discussion Starter · #4 ·
I think that I can get the price even cheaper than 675 for a DP and does phuzzy have his exhaust in production yet?<p>I want to make a performance based exhaust for cheaper than the big brands. I want every owner to be able to afford exhaust (christ I sound like the president hahaha) <p>Honestly though Just because I own a volvo doesnt mean that the metal for my exhaust is more expensive. I just want proof and evidence that it can be done so I am doing it myself. I am literally going to dyno, put on the exhaust and dyno again. see waht the results get me and then put up a video clip of it idling and WOT, and cruising. Is there any other evidence or things you would like to see out of an exhaust system?<p>-Colin
 

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Re: Wonder who wants a quality turbo back exhaust for under 1000 Dollars? (racecarcolin)

You should <B>easily </B>be able to have a good one made up for 4-$600
 

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Check this thread: <A HREF="http://forums.swedespeed.com/zerothread?id=120977" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=120977</A><p>Talks about the 02 downstream issues people have and the CEL's that get thrown. <p>I'd say people will favor a DP with no fitment issues (plug and play) and one that doesn't throw a CEL...but that is rather obvious isn't it.<p>Good luck with the production, again sounds like you are asking the right questions, keep us posted.<p>
 

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Discussion Starter · #7 ·
Thats what I figured too.<p>I will figure out pricing and everything else. It shouldnt be too much longer. I want exhaust really bad and figured I would offer what I could find to everyone else.<p>-Colin
 

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Just some input, I do believe the stock R exhaust is sufficient in that anything aftermarket does not add power, just changes the sound note. Another DP to the market can't hurt though.
 

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Discussion Starter · #9 ·
sufficient for how much power? stock power? <p>I think 3 inch is the minimum a turbo should have in order to breath.<p>-Colin
 

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Re: Wonder who wants a quality turbo back exhaust for under 1000 Dollars? (racecarcolin)

I would definitely be interested in this! Keep us posted. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 

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Re: (racecarcolin)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>racecarcolin</b> »</i></TD></TR><TR><TD CLASS="quote">sufficient for how much power? stock power? <p>I think 3 inch is the minimum a turbo should have in order to breath.<p>-Colin</TD></TR></TABLE><br>Not necessarily true, but a 3" will make a ton of noise and constant droning
 

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Discussion Starter · #13 ·
Well with power comes noise and if your content with stock exhaust more power to you. It is significantly lacking in terms of spool up on the down pipe side. I have seen .67 and .61 hot sides spool faster than our turbos do simply because of the down pipe. <p>I dont understand why you think the stock exhaust is sufficant? It is too small and does not flow enough air to be acceptable for 350-400 WHP. I believe it hinders performance at 300 HP even.<p>-Colin
 

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I'd agree with that.<p>I've heard it explained that there is no point to making your DP 3 inches when the exhaust condenses it back to 2 or 2.5 inches (whatever stock R exhaust is), supposedly it will minimize the gains from the 3 inch pipe.<p>Check out this post at V70R.com where they talk about it. Also the pic in there showing the difference in diameters at the elbow bend between stock and the Evolve pipe are crazy!!<p><A HREF="http://www.v70r.com/forums/index.php?showtopic=16561&st=20" TARGET="_blank">http://www.v70r.com/forums/ind...st=20</A><p>Pic is on page 3 (sorry for the laziness, I just got a ton of last minute work requests <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> )
 

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Re: (so_calR)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>so_calR</b> »</i></TD></TR><TR><TD CLASS="quote">I'd agree with that.<p>I've heard it explained that there is no point to making your DP 3 inches when the exhaust condenses it back to 2 or 2.5 inches (whatever stock R exhaust is), supposedly it will minimize the gains from the 3 inch pipe.<p>Check out this post at V70R.com where they talk about it. Also the pic in there showing the difference in diameters at the elbow bend between stock and the Evolve pipe are crazy!!<p><A HREF="http://www.v70r.com/forums/index.php?showtopic=16561&st=20" TARGET="_blank">http://www.v70r.com/forums/ind...st=20</A><p>Pic is on page 3 (sorry for the laziness, I just got a ton of last minute work requests <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> )</TD></TR></TABLE><p>Not necessarily true. I have A LOT of experience with different exhaust diameters on my 350Z. You don't NEED a 3 inch exhaust all the way back and you certainly don't NEED to maintain exhaust diameter all the way back either since the exhaust cools dramatically on it way to the back of the car and thus condenses. <p>There's guys with turbo Z's that run dual 3in all the way back and it loud and raspy as all hell. <p>I run 3.5in DP's that taper down to 3in and then I run a true dual greddy exhaust that tapers further down to 2.75 on the piping and resonators and then 2.5in through the straight through mufflers. My car sounds awesome. It's not loud and rapsy and I make the same power as the guys who run the big exhausts all the way back. The only cars that NEED very large unrestrictive exhaust are the ones running 800+rwhp on much larger turbos with lots of boost.
 

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Re: (VOGZ)

I've had three exhuast on my R stock,svenske,and tme the 3" svenske was <B>LOUD</B> the tme is quieter but a little louder than the svenske albiet a little heavier,and well we all know the deal on the stock.FWIW bought the svenske used and the tme new and never went over $750.
 

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Re: (volvosince16)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>volvosince16</b> »</i></TD></TR><TR><TD CLASS="quote">bought the svenske used and the tme new and never went over $750.</TD></TR></TABLE><p>They're looking to get the full TURBO-back system done for a reasonable price, downpipe + catback <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"><p>Now, I know it's not necessarily cost effective, but there are more than a few people itching for something that will be some sort of dual outlet design, with quad pipes seperated 2-by-2 on either side of the car. And <i>functional</i>.
 

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As VOGZ noted, running a straight 3" turbo-back is not required, even on a heavily boosted engine. I'm not a thermo-dynamics engineer, but I do believe that as exhaust gas cools it slows down and in order to maintain gas velocity through the pipes, you really should taper towards the end.<p>I'm sure there is a calculation that can determine the best solution, if any engineers want to tackle this project.
 

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Discussion Starter · #20 ·
That makes sense in theory but No one I have ever talked to in the motorsports industy has ever made a bigger to smaller exhaust. It has always been either the same or smaller to bigger. Does anyone know why this is?<p>-Colin<br>
 
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