Drivetrain R56 exhaust questions/ideas
#1
R56 exhaust questions/ideas
I have been considering fabricating my own exhaust. I am thinking of all stainless from the downpipe back, removing the second catalytic converter. I am wonder if it is a straight shot from the v-band clamp to the rear? I am thinking stainless flex pipe to straight pipe to muffler to tips. Is this possible? I'm capable of welding, but don't have a mandrel bender. Judging by the pics of ost stock R56 exahusts, it seems they have bends, but they don't look necessary.
Forgot to ask, is the v-band clamp a standard size?
Forgot to ask, is the v-band clamp a standard size?
#3
Nice, thanks! Gotta figure out what size exhaust makes sense for my target mods. I don't wanna go bigger than necessary, thinking either 2.5'' or 3''. Probably gonna use a Spintech muffler and do a Porsche Cayman exhaust tip.
#4
#5
That's the kind of info I was looking for and I am hoping that issue can be addressed with the flex pipe in the stock location. I figure over that long run, if I take advantage of the positionability with that flex pipe, it may put me where I need to be or at least close to it. Might have to get an exhaust shop to make some very small bends at the most I think.
#6
#7
Not to be a nagging Nelly, but if you can weld, why do you need a bender? There are plenty of places that sell SS bends. Cut and weld, and soon you will be in what the hell is that droning world, without a resonator.
Oh, and you can weld SS? You have a TIG welder? (I do...lol)
Oh, and you can weld SS? You have a TIG welder? (I do...lol)
I don't have a TIG, I have a MIG with gas.
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#8
With all the research I have done I see a lot of companies use 2.5" but there are a few 3.0" out there. What to choose?
My Volvo was a 3.0" and the WRX was 80mm, granted these cars have bigger displacements and MUCH bigger turbos. I am torn between 2.5" and 3.0"
BTW, this exhaust is just temporary as I plan to go full turbo back/tune when I can scrape up some more cash.
#10
I just peeped under my ride and noticed a small (what looks like a cat) just prior to the resonator, can that be entirely removed without problems during the emissions process?
And when you say 'catless' do you mean all of them or just that secondary cat I mentioned about above?
Last edited by myR56S; 05-17-2012 at 11:32 AM. Reason: Added question to aid answering
#11
The small cat is not monitored for emissions and can be removed. The JCW does not have the small cat as standard equip.
"Catless" generally means all of them, and will generate a check engine light, which will not go away without a tune.
2.5" will be plenty big even if you keep the downpipe cat. Good luck.
"Catless" generally means all of them, and will generate a check engine light, which will not go away without a tune.
2.5" will be plenty big even if you keep the downpipe cat. Good luck.
#12
The small cat is not monitored for emissions and can be removed. The JCW does not have the small cat as standard equip.
"Catless" generally means all of them, and will generate a check engine light, which will not go away without a tune.
2.5" will be plenty big even if you keep the downpipe cat. Good luck.
"Catless" generally means all of them, and will generate a check engine light, which will not go away without a tune.
2.5" will be plenty big even if you keep the downpipe cat. Good luck.
#13
#14
Without any cats = check engine light if you don't have a tune to eliminate the code being thrown, so that is one small issue.
Backpressure is not a factor on turbocharged engines. You could eliminate the exhaust pipe completly, but you may end up warping your hood scoop. have fun & good luck.
Backpressure is not a factor on turbocharged engines. You could eliminate the exhaust pipe completly, but you may end up warping your hood scoop. have fun & good luck.
#15
#16
#18
Hats off to you all for your advice, input and suggestions. You all rock
Last edited by myR56S; 05-23-2012 at 02:16 PM. Reason: Adding additional comments
#19
I decided to rock a resonator. 2.5" from the flex pipe back. Magnaflow muffler with two 4" double walled tips. Lifetime warranty. Sounds friggin' epic and looks the part. All for a fraction of the price. My exhaust guy is the man. Spools up considerably faster, tons more low-mid range torque and top-end feels stronger too. Throttle response in Eco mode is damn near the same as in Sport mode.
Hats off to you all for your advice, input and suggestions. You all rock
Hats off to you all for your advice, input and suggestions. You all rock
#20
Good morning,
I would love to post a video actually. Please be patient with me as I have a couple busy weekends ahead of me. I will get you something early next week after the long weekend
Just so you are aware I have since removed the resonator from my exhaust. I wanted more sound. It sounds just as smooth (thanks to the muffler) but has a little more volume to it. The resonator was 'turned' backwards for better flow but still necked the system down a little. I removed it and wow.
I would like to do a 3" now. So this one could be for sale if you like it
I would love to post a video actually. Please be patient with me as I have a couple busy weekends ahead of me. I will get you something early next week after the long weekend
Just so you are aware I have since removed the resonator from my exhaust. I wanted more sound. It sounds just as smooth (thanks to the muffler) but has a little more volume to it. The resonator was 'turned' backwards for better flow but still necked the system down a little. I removed it and wow.
I would like to do a 3" now. So this one could be for sale if you like it
#22
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