goucho

So i'm getting ride of my Hi-Flow Cat and putting in a test pipe. I'm leaning towards the Resonated Test pipe as opposed to a regular test pipe to help quiet things down. Does anyone have any comments for or against this?

Also, if I replace the Cat, will I have any CEL or sensor issues without a retune? Emissions? I'm going back down to English once I get it in, but am curious about anything that may come up when I replace it. Anything else I need to know?

Spanks

J Dog

iTrader: (3)

What brand Test Pipe? As long as the O2 sensor is not in the direct stream of the exhaust flow it shouldn't throw a CEL. I have the ETS TP with the J-Pipe O2 bung that pulls the sensor out the stream and I get no CELs (No tune either...at least no tune yet). I personally love the sound of the TP and I have a 3.5yr old and 1.5yr old that have absolutely no problem falling asleep to the sound while cruising around town or the highway.

Edit: Just noticed you had a 9, I don't know if ETS has TP for the 8/9? Either way as log as the sensor is pulled out of the stream via O2 extender/J-Pipe you shouldn't get a code. ER can turn it off as well I'm sure.

M8NSTER

You won't throw a code since ER tuned it already. It'll pass emissions too.

evo8426

iTrader: (27)

I couldn't stand the noise of the test pipe on my exhaust, I had both the resonated and non-resonated test pipe installed on my car. I think with the resonated version it has a deeper tone to it and isn't obnoxious cruising. I'm running the AMS turboback.

yahu

iTrader: (55)

I have a Buschur resonated TP and I like it. It definitely quieted things down in the cabin a bit, and I think the tone is a bit deeper. I usually get good comments about my exhaust sound too (running a Buschur Bullet). I'm in Redmond during the day if you'd like to take a listen/go for a quick drive.

goucho

Sweet. I definitely hit you up on that offer. I wanna go for a ride anyways. It's funny because I've actually never been in another Evo. Ever. Crazy.

yahu

iTrader: (55)

^that is funny, but makes sense. When we all meet we usually have our own cars, so not much of a point. I have been in other Evos though - carpooled with ShAngie to a meet once and drove Mikey's Evo for a bit when he was deployed. I also have been in a few others now that I think about it.

BTW - I live in Monroe but work in Redmond. Let me know when it might work for you as my days at work are flexible.

goucho

So I replaced the Cat with a Resonated Test pipe the other day and took it for a drive. No more knocking. I still have to get it tuned though to fully take advantage, but Butt dyno shows a slight improvement in spool. Awesome.

I was very surprised, however, that the loundness level was pretty much the same as the Hi-flow-cat. It has a slightly deeper tone, but it didn't get much louder. More Awsomer.

I'm trying to figure out though if there is anything else I should get before I get a retune to make it more worthwhile. Any suggestions?

http://youtu.be/qDYBH7CFFQI?hd=1

yahu

iTrader: (55)

are you on an SD tune yet?

goucho

What's an SD tune?

yahu

iTrader: (55)

SD = Speed Density. Removes the MAF and you need to add a 3-port minimum, but can pick up good power. Depending on numerous variables there could be some idle issues (personally I didn't have issues on the stock block).

goucho

oh yeah, Speed Density. Yeah I need to look into that more. Would I be using the same stock intake tubing and cone filter? I've hesitated changing the intake because the just seem to make the turbo louder without really any HP gain. I'll check into the SD. Thanks for the input

llDemonll

iTrader: (21)

ported intake/exhaust manifold

foxbear2277

iTrader: (3)

Resonator test pipe is the best way to go on the street, one could say best flow/low db Nothings worse than cabin drone...
Im also looking into this:

http://cascadeaudio.com/blog/treating_road_noise.htm

Should help quiet things down even more...light in weight too, better than other sound dampeners available

llDemonll

iTrader: (21)

http://sounddeadenershowdown.com/cgi-bin/index.cgi

check his site out also. they go about it two opposite ways; one says treat the whole area, the other says 25% is just fine