A few ?'s

[dirtybrd]

I need a few things, like measurement and what not. If someone has a spare testpipe or better yet, a cat laying around, would you measure how far the 02 bungs are from the turbo side flange. Also to anyone who has an EBC, where did you mount the valve? Does it matter how long the hoses are? I want to put my valve up by the battery, will affect the response of the WG. The exh. is being started on Monday!!!. It being done is the start to the finish.

[A4ringedONE8T]

EBC solenid lines need to be less than 12", I'm doing my 3" exhaust tomorrow evening, Ill measure the downpipe tomorrow when I take it out if you dont have them by then

[dirtybrd]

Thank you kind sir. Where did you mount yours?

[CO AVANT]

yes shawn is correct, I got my hoses to within 8". Got mine mounted on the frame rail, there was a hole to bolt or zip tie to.

OEM Cat 02 bungs are 3" and 13.5" from turbo flange.

APR 3+ TP 02 bungs are 2.5" and 16.5" from turbo flange...

[dirtybrd]

Thanks! Shawn, are you going 3" single or what?

[A4ringedONE8T]

yes shawn is correct, I got my hoses to within 8". Got mine mounted on the frame rail, there was a hole to bolt or zip tie to.

OEM Cat 02 bungs are 3" and 13.5" from turbo flange.

APR 3+ TP 02 bungs are 2.5" and 16.5" from turbo flange...

Mine is bolted to the frame rail as well under the turbo (through the hole where the SAI bracket used to bolt)

[A4ringedONE8T]

Thanks! Shawn, are you going 3" single or what?

full 3" turbo back into the mufflers I have now, Im going to have to cut the back side out though to get the 3" pipe into them. There are not any Quad tip 3" inlet mufflers so I have to modify what I have, we'll see how that turns out

[dirtybrd]

Overkill and loud.

[A4ringedONE8T]

Overkill and loud.

I like overkill, and we'll see how loud it is, I had 3" turbo back, no res, single muffler on my Jetta and it wasnt too bad

[7speed]

here you go

[dirtybrd]

I like overkill, and we'll see how loud it is, I had 3" turbo back, no res, single muffler on my Jetta and it wasnt too bad

To me it's just a waste of pipe and money. It's only gonna flow as much as the smallest pipe. You're already going to be bottle necking down into the mufflers. Plus 3" is going to be a bitch to fit around everything. And you'll never outflow a single 3'' to dual 2.25 or 2.5.

[dougyfresh]

OEM Cat 02 bungs are 3" and 13.5" from turbo flange.

APR 3+ TP 02 bungs are 2.5" and 16.5" from turbo flange...

That sounds about right based off what I recall on my car. I wish I knew Sunday I could have measured my custom downpipe while I had it off my car. I'll measure tonight.

[dirtybrd]

Don't worry about it. I'm going to use the stock locations for them.

[dougyfresh]

Don't worry about it. I'm going to use the stock locations for them.

Okay.

I got your email. Keep me posted. Definitely interested. While I had my turbo and manifold out this weekend I got to snooping around the engine compartment and am now a few steps closer to figuring out which wires can disappear and which vacuum lines can go. Gonna go with a two-can catch-can system too.

Also figured out how to get the entire engine and trans out of the car in one swift movement. Gonna leave all lines and wires connected to it and pull it out in one big piece like what is commonly done on the B5 S4s.

[A4ringedONE8T]

To me it's just a waste of pipe and money. It's only gonna flow as much as the smallest pipe. You're already going to be bottle necking down into the mufflers. Plus 3" is going to be a bitch to fit around everything. And you'll never outflow a single 3'' to dual 2.25 or 2.5.

And the smallest pipe is going to be 3" .... I dont see your issue. Im not bottle necking anything into the mufflers, its going to be 3" into them and 2 3.5" tips out of each and full 3" fits fine, especially without any rear drivetrain. 3" to dual 3" outflows 3" to 2.25 or 2.5

[dirtybrd]

Just kinda pointless to me, but to each his own. I just saying you'll never outflow dual 2.5s. Or even a single 3'' for that matter. Mike even runs a 3" on his car.

[DenverNoob]

as long as there is little to no post-turbo backpressure, 3in may be overkill but I dont think it will cause any problems. my only concern would be loss of exhaust velocity and hence the emergence of eddys in the flow...causing addl backpressure and flow disruption. on sucha large exhaust with such little exhaust flowing relative to the size of that exhaust...even that might not present any issues.

thermals design has always been interesting with the 3in midpipe...and i have backpressure tested that setup and it is virtually nil (less than 1psi)...and i always figured the 2.5in DP was a weakness in that setup for a BT....and post-split its not really gonna matter 2.25 or 2.5 or 3in really...not that far back in the system...so i think 3in while excessive will flow nicely and do just fine.

[dirtybrd]

But he's doing 3" to dual 3".

[DenverNoob]

But he's doing 3" to dual 3".

i know...i think at the split where he goes to full 3in (whereas the thermal goes to 2.25) the difference will be insignificant...gasses have cooled quite a bit at that point and will prob just dump out. I actually wouldnt be fully suprised if the exhaust at even part throttle picked (or rather preferred) one pipe over the other and mostly used that one...given the orientation and the flow characteristics when its built the exhaust gasses will flow the path of least resistence...prob mostly through one 3in pipe or the other at the split.

what i was getting at is i dont believe that the 3in splits in the exhaust will have any tangible power advantage over a 2.25in split as in the thermal...and that a 3in DP will be far more advantageous given it is the beginning of the exhaust track.

[AudiA4_20T]

my exhaust outflows everyone right now... testpipe to nothing FTW

[B6Lovin]

^ been there. that shit is loud and fun!

you go prowl parking garages and set off car alarms with it yet?

[dirtybrd]

i know...i think at the split where he goes to full 3in (whereas the thermal goes to 2.25) the difference will be insignificant...gasses have cooled quite a bit at that point and will prob just dump out. I actually wouldnt be fully suprised if the exhaust at even part throttle picked (or rather preferred) one pipe over the other and mostly used that one...given the orientation and the flow characteristics when its built the exhaust gasses will flow the path of least resistence...prob mostly through one 3in pipe or the other at the split.

what i was getting at is i dont believe that the 3in splits in the exhaust will have any tangible power advantage over a 2.25in split as in the thermal...and that a 3in DP will be far more advantageous given it is the beginning of the exhaust track.

That's what I was saying also. It's pointless for anything other then looks. Honestly my going to dual 2.5" is overkill.