Gains from only a DP and TP?
Gains from only a DP and TP?
Tried searching, but what would the gains be from just a 3" downpipe and testpipe mated with the stock IX exhaust?
I know having a full TBE is best but I'm strapped for cash right now and this seems to be the cheapest exhaust upgrade for the time being.
I know having a full TBE is best but I'm strapped for cash right now and this seems to be the cheapest exhaust upgrade for the time being.
Newbie
Joined: Mar 2008
Posts: 54
Likes: 0
From: sac
i was also wondering about this. Just installed a dp and tp on my evo9. boost comes quicker but I cant really feel much power difference. Besides the slight fluttering noise, its quiet as stock. No exhaust leak, hoping the sound is normal after the upgrade.
I was planning on installing the downpipe and test pipe with a hallman. Are you saying that just a test pipe and a MBC will net you around 30hp?
Evolving Member
Joined: May 2007
Posts: 123
Likes: 0
From: Sacramento
I would think that you would see some gains but it would be minimal because you are still restricting your DP and TP with the stock catback piping. Stock catback piping is smaller in diameter and has some nasty bends to restrict airflow even more.
I have also heard that your exhaust system will only flow as well as its weakest link, which also makes sense. Which means that you wont be making any gains at all with that stock catback.
I'm not sure which theory to believe exactly because they both make sense.. But I'd like to think you made some minimal gains.
I have also heard that your exhaust system will only flow as well as its weakest link, which also makes sense. Which means that you wont be making any gains at all with that stock catback.
I'm not sure which theory to believe exactly because they both make sense.. But I'd like to think you made some minimal gains.
MaxKanisha is right, Leaving the stock cat back would choke up whatever gain you made with the DP and TP.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.
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Evolving Member
Joined: May 2007
Posts: 123
Likes: 0
From: Sacramento
MaxKanisha is right, Leaving the stock cat back would choke up whatever gain you made with the DP and TP.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.
. I guess what my real question should have been was will i notice anything with the butt dyno? Someone already said they didn't notice anything though. damn...
do it or jus wait to buy a complete tbe kit...
buy Megan racing or hell even the ebay tbe
better to have one whole kit rather than jus piecing together one makes life easier
i was like you once haha... i bought the DownPipe and TestPipe and jus ran them open till i bought a catback haha
buy Megan racing or hell even the ebay tbe
better to have one whole kit rather than jus piecing together one makes life easier
i was like you once haha... i bought the DownPipe and TestPipe and jus ran them open till i bought a catback haha
Newbie
Joined: Mar 2008
Posts: 54
Likes: 0
From: sac
MaxKanisha is right, Leaving the stock cat back would choke up whatever gain you made with the DP and TP.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.
Free flowing from turbo back is what you are trying to do, think of it as a busy highway going from a 4 lanes to a two lane, regardless of where along the line it happened, it's gonna create traffic.
If anything, you want the furthest part (from the engine) of your exhaust to be the least restrictive part of the system, not the other way around.