Gutted DP's with Non-Res Catback?

[PBallard]

Anyone running this setup?
Looking to purchase a setup in about a week and doing my final research. I want a great sounding and great performace exhaust. For performance im going with the Gutted DP's but I want the car to still sound great but not insanely LOUD!

If anyone has any clips with Gutted DP's and any catback they would be greatly appreciated.
Thanks!

[Justincredible]

My car was a little too loud for some. But catless is good but you need to know its going to be loud

I think you have herd mine correct? Ive posted clips of it a few times.

[THE--ORB]

I gutted my cat last weekend. Big a@@ diff on power. Turbo spools quicker. And has a deeper tone. Its a start. Just tinkering with it. I will try to get a clip of how it sounds

[THE--ORB]

Justincredible dont worry about grammer. My dad was so cheap he bought me hooked on kronick thinking he would save money than getting hooked on phonics. Lol

[PBallard]

No Justin I hvent heard yours. I did read your write up though. Very informative. That's when I knew I had to go gutted DP's. Pretty sure i'm going FI DP's with FI catback.. Ate you running Non-Res catback or Resonated? I would love to hear one of your clips though.. Do you have a link? That'd be amazing.

[Justincredible]

Here Ive always liked this one

http://videos.streetfire.net/video/B...-M3_203342.htm

My car no cats flowmasters 2.5 cat back,Resonated the word isn't even in my dictionary. LOL it might be a good idea to get resonated depending on your driving style

The FI cat back sounds great with cat less Dp's

[PBallard]

Nice video Justin!! And nice kill on the M3.
Doesnt sound to loud in the video but maybe different in real life. Ha.
Im hoping the FI exhaust will sound amazing. Im just debating on Res or Non-Res at this point. I want something that just absolutaly sounds like a beast. Ha. Right now im leaning Non-Res but we will see in about a week when the order goes out!

[Justincredible]

Thanks,

I don't think its too loud. It really depends on the person, as far as res-non res, if your even thinking it may be to loud, get the res. You can always remove the resonators later. But it sounds like you did your home work and you know what is right for you

[PBallard]

Yeahh Ive been looking around for quite awhile. Haha. I like getting what I want especially when it runs me about $2,500. lol Im just wondering if Non-res would get annoying after awhile. You know? Do you have a clip of just sticktly your exhaust. Im just trying to be picky with the exhaust. Sorry for the hassle.. Youve been a lot of help.

[PBallard]

Also ment to ask.. If I do Non-Res and Gutted DP's will the CEL always be on or is there a way I can get it to turn off. I do not want to be driving around with a CEL on all the time. Lol I think I read Jay at JHM knew of a way to keep it from popping up but idk.

[beemercer]

Also ment to ask.. If I do Non-Res and Gutted DP's will the CEL always be on or is there a way I can get it to turn off. I do not want to be driving around with a CEL on all the time. Lol I think I read Jay at JHM knew of a way to keep it from popping up but idk.

You'll need to get your ECU retuned with a rear cat delete file. I have one on my JHM tune, it takes some fine adjustment to get it right, but once it's all set you won't have a CEL anymore.

And as far as sound volume levels go, gutting the cats will really open up the sound a lot. So like Justin said, if you are worried about it being too loud I'd advise you to get a resonated exhaust to start.

[RAudi Driver]

It pains me to see you guys taking out your cats.

I just think that our environment is more important than you guys shaving off tenths of seconds.

[jfunkey]

It pains me to see you guys taking out your cats.

I just think that our environment is more important than you guys shaving off tenths of seconds.

You know I used to be on the same page as you. But when you look at how efficent our cars are clean air wise and emmisions wise. Its not as big of an issue.

I know removeing the cats is removing the last line of deffence but you have to know that when the car is running how its suposed to. The cats don't do more then just get in the way. our cars have a wide band 02 that keeps the A/F as clean as possible as fast as possible between the fuel adjustments

The thought that. Oh there are WAY more things that we need to worry about before we get concerned with this issue. Dosn't fly but it should be noted.

Also the global warming thing. ha ha ha ya its aug 6 and its 72 as apossed to last few years 92. The trend depending on who you talk to actually shows the cooling of the earth over the next 4 years.

But all in all. I do have to agree. Removing the pre cat should be more then enough Vs the small amount of power left on the table with the main cats in the way

[PBallard]

Beemercer.. Can I get that done without getting the full JHM Tune? Im planning on doing that eventually but I'm going with just the DP's and Catback 1st. The Tune will come soon after though.. Id rather not be driving around with a CEL til I get the tune. Lol

[jfunkey]

I don't think there is such a thing as just getting the CEL turned off. I think that is part of the tune. Its a tottal package thing

[PBallard]

Alright that is what I was wanting to know. I guess I will have an excuse to get the chip sooner then.

[beemercer]

Beemercer.. Can I get that done without getting the full JHM Tune? Im planning on doing that eventually but I'm going with just the DP's and Catback 1st. The Tune will come soon after though.. Id rather not be driving around with a CEL til I get the tune. Lol

JFunkey is right, the rear O2 sensor CEL is eliminated by adjusting the air flow range for the rear O2 sensors to a level appropriate for the flow present in a de-catted exhaust. It is necessary to re-tune the ECU in order to achieve this, unfortunately its not soft-coded in with the scan tool or anything along those lines.
Honestly though, the JHM tune does make a significant impact in the performance of the vehicle. It is very much a "street-tune" as apposed to a "dyno-chip", in that, relative to other tunes, you will make more power, more consistently, throughout a greater span of the powerband.

And my thoughts on catalytic converters and pollution/ global warming is that there are 1,000,000,000 cattle in the world, farting out a gas (methane) twenty times more potent as a green house gas than CO2, all the damn time; my little Teutonic Rocket ain't doing shit compared to them. Now obviously carbon-dioxide is only a portion of the pollutants produced by cars, but it seems to be the most important in everyone's minds.
Regardless, by polluting more I am only ensuring my future job security (going to school for Chemical Engineering concentrating on Environmental Issues), so pollute away everyone!

[RAudi Driver]

You know I used to be on the same page as you. But when you look at how efficent our cars are clean air wise and emmisions wise. Its not as big of an issue.

I know removeing the cats is removing the last line of deffence but you have to know that when the car is running how its suposed to. The cats don't do more then just get in the way. our cars have a wide band 02 that keeps the A/F as clean as possible as fast as possible between the fuel adjustments

The thought that. Oh there are WAY more things that we need to worry about before we get concerned with this issue. Dosn't fly but it should be noted.

Also the global warming thing. ha ha ha ya its aug 6 and its 72 as apossed to last few years 92. The trend depending on who you talk to actually shows the cooling of the earth over the next 4 years.

But all in all. I do have to agree. Removing the pre cat should be more then enough Vs the small amount of power left on the table with the main cats in the way

I agree, just wanted to put something out there for whoever to ponder.

[PBallard]

Yeahh. I was planning on getting the chip down the road but I deff. dont want the CEL on all the time so I will be chipping the S pretty soon after the Exhaust setup is on. Wish I knew the sound difference in the Non-Res and Res Catback with Gutted DP's. Does anyone take a guess and gimme an example. Haha. Just last thought. Ordering around noon soo will be making the decision then.

[cbdsm95gst]

You'll need to get your ECU retuned with a rear cat delete file. I have one on my JHM tune, it takes some fine adjustment to get it right, but once it's all set you won't have a CEL anymore.

And as far as sound volume levels go, gutting the cats will really open up the sound a lot. So like Justin said, if you are worried about it being too loud I'd advise you to get a resonated exhaust to start.

Thats what I did with my B5 guys. Bought the borla system and like 3 weeks later I chopped the resonator out. My B6 system is running what it states in my signature and I think its perfect. Decent power gain too.

[PBallard]

Just put the order into JHM.
FI DP's no Cats and FI Catback Resonated.
Cant wait to get it and slap it on the car.
Gonna sound mean!