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Discussion Starter · #1 ·
i may be ordering the evolve 3.5" pipe soon, and decided i was goign to have a custom job done for my exhaust again. It's currently a 2.5" from the cat to the rear, into a dynomax race bullet muffler where the stock muffler box was. nothing inbetween. I love the unique sound it makes. When I get my downpipe, i am going to have the exhaust re-done but was unsure of how big i should go...i was thinking of stepping it up to 3 -- is there any reason to go bigger, or should i leave my exhaust as it is?<p>What DP's is everyone runnign and would you reccomend it? what would be the best thing to run if i plan on doing a turbo upgrade in the future?<BR><BR>
<i>Modified by Cicada at 12:14 PM 8-8-2006</i>
 

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Re: what exhaust/exhaust diameter are you running with your Downpipes? (Cicada)

if you're looking at future mods especially a turbo upgrade, don't put limits on yourself man, just go for the 3.5" IMHO... <p>
 

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Discussion Starter · #3 ·
Re: what exhaust/exhaust diameter are you running with your Downpipes? (Serdar-S60T5)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Serdar-S60T5</b> »</i></TD></TR><TR><TD CLASS="quote">if you're looking at future mods especially a turbo upgrade, don't put limits on yourself man, just go for the 3.5" IMHO... <p></TD></TR></TABLE>from the previous threads i've read through a search, it seemed that R_Rated had problems with fitting his GT30R to the evolve 3.5", not sure if they were _big_ problems, but if it was too much of a hassle, i'd rather not go that route, as i dont think im going to go as big as boosted with the GT35R [especially since i dont have any local tuners, and iPD has a proven tune for the GT30].
 

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Re: what exhaust/exhaust diameter are you running with your Downpipes? (Cicada)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Cicada</b> »</i></TD></TR><TR><TD CLASS="quote">from the previous threads i've read through a search, it seemed that R_Rated had problems with fitting his GT30R to the evolve 3.5", not sure if they were _big_ problems, but if it was too much of a hassle, i'd rather not go that route, as i dont think im going to go as big as boosted with the GT35R [especially since i dont have any local tuners, and iPD has a proven tune for the GT30].</TD></TR></TABLE><p>There will be problems period if you get an exhaust that bolts too the stock turbo. More of a flange problem than the whole DP. Although a 3" is snug and the 3.5" is very tight. The 3.5" makes it pretty hard to do any altering at all. It has to fit "just right" or it won't fit at all. I do recomend the 3.5" DP though. But it is a PITA to get right.<p>If you are going to be doing a turbo upgrade then waite till then and go 3.5" all the way back. That's how mine is and I love it. 3.5" may be a bit much all the way for a stock hair dryer.<p>As far as getting a shop to do the work... When it comes to the DP you really are better off buying one then having one made. The quality/fit-finish cannot be replicated without mass production without spending 4K to have it made. (I am sure that somone will contest this but whatever) <p>The exhaust though, If you want a single pipe going back then there are 3 considerations that need to be made. One being clearance, it will be worse with this design. The second is keeping things looking stock; for this you really should get 2 pipes like the TME/ferrita designs. Third is flow, The single, round pipe all the way back mandrel bent will offer the best flow but will compromise clearance and there is none on the market with a perfect fit. Also, this should be an easy job even for an average muffler shop (just try to get somone with a mandrel bender.)
 

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Discussion Starter · #5 ·
Re: what exhaust/exhaust diameter are you running with your Downpipes? (R_Rated)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>R_Rated</b> »</i></TD></TR><TR><TD CLASS="quote"><p>There will be problems period if you get an exhaust that bolts too the stock turbo. More of a flange problem than the whole DP. Although a 3" is snug and the 3.5" is very tight. The 3.5" makes it pretty hard to do any altering at all. It has to fit "just right" or it won't fit at all. I do recomend the 3.5" DP though. But it is a PITA to get right.<p>If you are going to be doing a turbo upgrade then waite till then and go 3.5" all the way back. That's how mine is and I love it. 3.5" may be a bit much all the way for a stock hair dryer.<p>As far as getting a shop to do the work... When it comes to the DP you really are better off buying one then having one made. The quality/fit-finish cannot be replicated without mass production without spending 4K to have it made. (I am sure that somone will contest this but whatever) <p>The exhaust though, If you want a single pipe going back then there are 3 considerations that need to be made. One being clearance, it will be worse with this design. The second is keeping things looking stock; for this you really should get 2 pipes like the TME/ferrita designs. Third is flow, The single, round pipe all the way back mandrel bent will offer the best flow but will compromise clearance and there is none on the market with a perfect fit. Also, this should be an easy job even for an average muffler shop (just try to get somone with a mandrel bender.)</TD></TR></TABLE>my current exhaust is a 2.5" single pipe, mandrel bent all the way back to the dynomax race bullet as i was talking about -- it sounds nice, and i want to keep it like that, so i think i may bump it to a 3.5" all the way back when i go with the evolve 3.5" DP.<p>so you reccomend i wait until i've got everythign ready for the turbo upgrade before installing DP and redoing exhaust? sounds like a plan <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0"><p>i'm waiting for the iPD softloader anyway, and after that ill be looking at getting the DP and turbo [i think ive decided on the same one as you're running, as i dont want all the lag that will come with the 35R, plus my car will never make that much power, anyway. I've also considered the GT28R, but considering my limited performance shop options here, i'd be running iPD's tune for the 30R]
 

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Re: what exhaust/exhaust diameter are you running with your Downpipes? (Cicada)

A round 3.5" will scrape on everything where it has to go under Haldex IMO. Even Svenske had to put a slight crease in with their 3" to keep it from hanging to low. <p>A 3" pipe already has 44% more flow volume than a 2.5".<p>I would go with 3" DP and 3" exhaust, but that is just me. <p>BTW, I did acceleration runs on a R with BSR, CAI, filter, 3" DP - before and after the owner swapped out the 2.5" center resonator section on the Jetex with a custom 3" center resonator section. I recorded absolutely no difference in timed acceleration runs. Just a lower, slightly louder burble.
 

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Discussion Starter · #8 ·
Re: what exhaust/exhaust diameter are you running with your Downpipes? ("R" Kelly)

what's the dia of the jetex exhaust?<p>i really dont want to have any issues when upgrading the turbo so i'll follow your advice and will probably go 3"/3" -- i'll research the merits of each DP tonight. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"> If i'm going 3" i'm looking to score one of the SvR DP's from alamo.<p>any reccomendations for DP that wont have too many issues with upgrading, installation, and emissions? thanks!<BR><BR>
<i>Modified by Cicada at 11:03 AM 8-9-2006</i>
 

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Re: what exhaust/exhaust diameter are you running with your Downpipes? (Cicada)

when it comes to mods, every combo is gonna be a little different
 

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Discussion Starter · #11 ·
Re: what exhaust/exhaust diameter are you running with your Downpipes? (gdogg16)

ill be using the svenske DP, and have the custom exhaust running from there. I had my 2.5" done for under $400, but it wasn't necessarily a tough job for the muffler shop. I imagine a 3 or 3.5 shouldnt cost much more unless the extra girth really causes them problems in which they will need to actually think and be creative. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0">
 
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