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Old 06-29-2006, 07:40 AM   #76
goixiz
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Any new 2006 exhaust difference info ? Ive heard that the 2006 lengths are different
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Old 06-29-2006, 08:59 AM   #77
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from the first post in this thread....

origionally posted by unabomber
"I have an 06 WRX, is the downpipe the same?
No. The 2006 WRX has a unique exhaust in that it's downpipe is both the downpipe and catpipe sections of the "older" exhaust. This means you must use a "long" downpipe to bolt up to the rest of your exhaust system. A full TBE will fit fine, but when replacing just the downpipe, you must use a long downpipe. Check with your Vendor for other possible fitment issues prior to ordering."
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Old 07-06-2006, 08:24 AM   #78
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do blank plate downpipes not cause boost creep?
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Old 07-06-2006, 10:04 AM   #79
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Boost creep is covered in the boost creep sticky in the 2.5L forum. There's more to it than downpipe type/design.
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Old 07-08-2006, 06:00 PM   #80
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This thread is NOT for will XXX exhaust fit my XXX car. That's what Vendors are for, go bug one.
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Old 08-01-2006, 04:16 PM   #81
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What are torque specs for the downpipe to the turbo? I couldn't find this information in searches. Thought it might be helpful here.
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Old 08-01-2006, 04:29 PM   #82
gleinz
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According to Cobb, the torque spec is about 26 ft-lbs.

http://www.cobbtuning.com/tech/Instr...RXDownpipe.pdf
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Old 09-07-2006, 07:56 PM   #83
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I just ordered the helix dp and the mechanical cel fix is back ordered. Will running the car with the CEL cause it to go into limp mode or anything of that sort?
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Old 12-03-2006, 09:03 PM   #84
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I know there is stuff out there about it, but you might want to add something about the AC drip line. It might help stop the "I just installed my DP now it smells and is smoking" thread. If I missed something about in one of the vendor or scoobymods instructions I apologize. Great write up though. As are pretty much all of them are.
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Old 02-19-2007, 07:35 PM   #85
hey1
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Can anyone explain to me about a downpipe that regulates the acuator vs. a non-regulated? I was somehow convinced to get a divorced downpipe a while back.. I purchased the shorty downpipe by Bosal. When I accelerate out of vacuum to boost (negative to zero to positive on a boost gauge), I've always been hearing this whistling sound while the needle of the boost gauge is a mid-negative numbers (during vacuum). My car can peak at 0.11MPa with my modifications, which includes Perrin lightweight crank pulley, Version 7 STi up pipe, Bosal shorty divorced downpipe and an ECUTek tune up. While trying to solve my car's mediocre list of problems, I'm trying to understand how my stock turbo works with my downpipe and I'm hoping that it might be resolving issues upon being educated with my car's aftermarket parts and their functionalities (sorry for the run-ons). So I spoke with a friend and the matter of how my downpipe regulates the actuator brought up to attention. To get to the point, how does my bosal downpipe work with my turbo's waste gate actuator?



I was told that in order to hold boost, the wastegate should be closed. With the stock down pipe having a backing plate, it is able to hold the wastegate close. Then it made me wonder how a huge bellmouth down pipe would work.
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Old 05-05-2007, 08:49 AM   #86
kike_ej20
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Crucial Racing...


Hi there,

just wondering if you can lat me know the measurement of that half moon shaped piece of steel(the one on the exhaust side).

thank you
Nelson
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Old 05-05-2007, 09:04 AM   #87
CynicX
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Quote:
Originally Posted by hey1 View Post
Can anyone explain to me about a downpipe that regulates the acuator vs. a non-regulated? I was somehow convinced to get a divorced downpipe a while back.. I purchased the shorty downpipe by Bosal. When I accelerate out of vacuum to boost (negative to zero to positive on a boost gauge), I've always been hearing this whistling sound while the needle of the boost gauge is a mid-negative numbers (during vacuum). My car can peak at 0.11MPa with my modifications, which includes Perrin lightweight crank pulley, Version 7 STi up pipe, Bosal shorty divorced downpipe and an ECUTek tune up. While trying to solve my car's mediocre list of problems, I'm trying to understand how my stock turbo works with my downpipe and I'm hoping that it might be resolving issues upon being educated with my car's aftermarket parts and their functionalities (sorry for the run-ons). So I spoke with a friend and the matter of how my downpipe regulates the actuator brought up to attention. To get to the point, how does my bosal downpipe work with my turbo's waste gate actuator?



I was told that in order to hold boost, the wastegate should be closed. With the stock down pipe having a backing plate, it is able to hold the wastegate close. Then it made me wonder how a huge bellmouth down pipe would work.
All that divorsed gate does is seperate the flow of exhaust and the wastegate exhaust. You wont find much, if any power gains from the design. I have the same thing with my invidia v4 downpipe. The actuator is what open and closes the wastegate...you'll see the arm of it pipe/tube/rod looking thing on the outside of the turbo. All that piece does is seperate the flow and supposedly cut down on turbulance, other divorse waste gate designs supposedly work "better" with a small tube that dumps back into the exhaust X amount of inches away.

The turbo is ALWAYS spinning and thats probably the whistle you are hearing. Even at idle there is a flow of exhaust over the turbine and spins the turbo. Generally they whistle or make noises but you can only hear it at low RPM, then its immediately drowned out by engine and exhaust noise.

HTH
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Old 09-15-2007, 02:58 PM   #88
jaysuss
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06 STI w/SPT 3" catback and SPT air intake-will Helix catted downpipe fit to this cat w/o any "adjustments"? Looking to go this way and Accessport Stage 2.
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Old 09-19-2007, 04:31 PM   #89
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sorry for draggin up an old thread but i have a question. Where can I get a DP flange to make my own DP? I think I'll make my own custom dp for my car. msot likley utilizing the split design as it woudl seem to work beter for this situtation in my opinion.
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Old 09-19-2007, 05:47 PM   #90
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Quote:
Originally Posted by oscarmayer View Post
sorry for draggin up an old thread but i have a question. Where can I get a DP flange to make my own DP? I think I'll make my own custom dp for my car. msot likley utilizing the split design as it woudl seem to work beter for this situtation in my opinion.
Just cut it off your stocker.....
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Old 09-24-2007, 08:36 AM   #91
Antho...
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wow last post 2004.

i mean 2007!
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Old 11-14-2007, 01:48 AM   #92
Enigmatic
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Exclamation Bell Mouth DP on WRX ADM 2006

Just installed a Kakumei DP(bell mouth) on my WRX ADM 2006,apparently since ADM and JDM spec are all right hand drive, installing other DP other than the flat needs some modification.The bellmouth DP is in the wayy of the steering rod.Either ask for refund and buy JDM spec DP like KHS or modified the DP. I did the later part. My mechanic took a chunk out from the side of the bell mouth to make way for the steering rod. SO beware when buying DP for ADM and JDM car
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Old 12-10-2007, 08:52 PM   #93
esmith32
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Default Cobb Catless DP

for my 06 WRX, would putting on the Cobb Catless Down pipe trigger a cel. and if so what could i do without having to put on EM.
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Old 12-19-2007, 03:08 PM   #94
nvsn8
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search for cell fix
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Old 12-19-2007, 04:55 PM   #95
WRXislander
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Quote:
Originally Posted by esmith32 View Post
for my 06 WRX, would putting on the Cobb Catless Down pipe trigger a cel. and if so what could i do without having to put on EM.
1) Yes.
2) Search for "mechanical fix". But that will only suppress the CEL. You'll have other issues without EM. Again, search.
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Old 05-22-2008, 06:45 PM   #96
Snake Griffin
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Do you still have to do the CEL fix if you use AP to clear the codes?
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Old 05-22-2008, 07:05 PM   #97
CynicX
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^^^

AP will take care of codes cause be the downpipe. Other codes are still displayed...
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Old 05-22-2008, 07:07 PM   #98
CynicX
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Quote:
Originally Posted by esmith32 View Post
for my 06 WRX, would putting on the Cobb Catless Down pipe trigger a cel. and if so what could i do without having to put on EM.
You are seriously risking engine health by running a downpipe on a 2006 without EM. This is probably covered in the Engine Management section of Unabombers manifesto if not in this sticky already....
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Old 07-22-2008, 08:14 PM   #99
1fastser
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Quote:
Originally Posted by Unabomber View Post
Downpipe FAQ
What is the CEL fix? It stops the rear CEL code P0420 Catalyst System Efficiency Below Threshold from appearing, this code being caused by the lack of a catalytic converter in the downpipe. This is usually fixed with a Pony Express MIL Eliminator or similar fix. Ensure you obtain the correct type for your model year as there are two types: 02/03 and 04. The 05+ does not currently have an electrical fix. Another fix is the mechanical fix, which works on all models. ***NOTE*** There are two CEL fixes for the WRX, the other one is the 2.2 KOhm 1/2 watt resistor. It is used to combat the CEL code P0546 = Exhaust Gas Temperature Sensor Circuit Malfunction (High Input) in the uppipe. This notice, though not important to this thread, acknowledges there are two "CEL fixes" and defines them individually to avoid possible confusion.
FYI, pony express link no longer works.
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Old 08-21-2008, 02:42 PM   #100
JoeSUBARU
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Quote:
Originally Posted by jaysuss View Post
06 STI w/SPT 3" catback and SPT air intake-will Helix catted downpipe fit to this cat w/o any "adjustments"? Looking to go this way and Accessport Stage 2.
Cobb Stage 2 with an Intake? Is that ok? I thought you needed a stock intake.

....Do you need to get a tune when using a DownPipe?
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