Owners Of Catless DPs, I have a question
duhh, there isn't a performance gain with a MD. It's simply a sound mod. I knew this and know it going into what I ordered.
I was statting that with a catless DP I'll go faster than with my stock DP, I'll be quieter than I am now and lose my gurggles, but I'll go faster.
if you have too large of an exhaust you can lose back pressure which would be bad. The stock DP is the most restrictive part of the car. That frees up enough flow for the exhaust to exit, hence 15whp gained. Our stock ID's are perfect for up to 400hp. No need to go spending $$ on something that will yield you little results (full exhaust)
I was statting that with a catless DP I'll go faster than with my stock DP, I'll be quieter than I am now and lose my gurggles, but I'll go faster.
if you have too large of an exhaust you can lose back pressure which would be bad. The stock DP is the most restrictive part of the car. That frees up enough flow for the exhaust to exit, hence 15whp gained. Our stock ID's are perfect for up to 400hp. No need to go spending $$ on something that will yield you little results (full exhaust)
Back pressure is a restriction.
And on a turbo car, you have a ridiculous amount of back pressure because of the turbo.
This is why turbos like to have like, no exhaust on them. Back pressure is the wrong word to try to describe what you are.
No, back pressure is bad in any situation.
Back pressure is a restriction.
And on a turbo car, you have a ridiculous amount of back pressure because of the turbo.
This is why turbos like to have like, no exhaust on them. Back pressure is the wrong word to try to describe what you are.
Back pressure is a restriction.
And on a turbo car, you have a ridiculous amount of back pressure because of the turbo.
This is why turbos like to have like, no exhaust on them. Back pressure is the wrong word to try to describe what you are.
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Joined: 06-28-08
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From: Clarksville
What about with a S/C? Everything stock except intake. Catless DP. Stupid question, is that the only cat we have or is there 1 farther back in the exhaust (I've never looked)
question on this downpipe conversation...People say you can run a 3" dp with the stock exhaust...would that be pointless? Or since our exhaust is supposedly pretty good, would that be a beneficial mod if one might not get a full 3" exhaust for a while? Logically the whole larger to smaller deal doesn't quite make sense to me but maybe ya'll can help.
^If you look at it that way, you'll understand the whole 3.0in to 2.5in thing.
This BY NO WAY means that just cutting off three feet of your exhaust from the back end gives the same results, cause you still have the restrictive downpipe.
However replace the downpipe with a 2.5in mendrel bent pipe to match the exhaust and then cut 3 feet off, you'll have free-er flowing exhaust.
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Joined: 11-29-08
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From: San Diego
Since I live in Cali and we have the emissions thing, could a cop smell the fumes of the catless downpipe and then i get pulled over if he was right behind me? Or if i got pulled over for having to load of an exhaust could he figure it out or is it pretty hard to figure out?
And wouldn't it make sense that if you got a 3in downpipe to get a 3in exhaust? Because im really stuck between getting a 3in exhaust with 3in dp or keeping our stock exhaust with a 3in downpipe.
And wouldn't it make sense that if you got a 3in downpipe to get a 3in exhaust? Because im really stuck between getting a 3in exhaust with 3in dp or keeping our stock exhaust with a 3in downpipe.
Last edited by eman777; Jul 22, 2009 at 01:55 PM. Reason: Automerged Doublepost
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Joined: 10-28-08
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From: New Milford, NJ
qft
i only have a measley 2.2 with a high flow and if you stand back there when its running you can sure as hell smell it.
then again i think i'm running a bit rich.
but it won't take a rocket scientist of a cop to realize youre catless. it has a very distinctive smell.
i only have a measley 2.2 with a high flow and if you stand back there when its running you can sure as hell smell it.
then again i think i'm running a bit rich.
but it won't take a rocket scientist of a cop to realize youre catless. it has a very distinctive smell.
http://www.youtube.com/watch?v=hXw1R...eature=related
http://www.youtube.com/watch?v=aCF4CLUto6A
the second vid. is WOT, the first is just the exhaust sound... i have 3' custom exhaust with out resonator and catless downpipe
you can smell the fumes like a Moda.....
http://www.youtube.com/watch?v=aCF4CLUto6A
the second vid. is WOT, the first is just the exhaust sound... i have 3' custom exhaust with out resonator and catless downpipe
you can smell the fumes like a Moda.....
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Joined: 11-29-08
Posts: 397
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From: San Diego
qft
i only have a measley 2.2 with a high flow and if you stand back there when its running you can sure as hell smell it.
then again i think i'm running a bit rich.
but it won't take a rocket scientist of a cop to realize youre catless. it has a very distinctive smell.
i only have a measley 2.2 with a high flow and if you stand back there when its running you can sure as hell smell it.
then again i think i'm running a bit rich.
but it won't take a rocket scientist of a cop to realize youre catless. it has a very distinctive smell.
Senior Member
Joined: 10-28-08
Posts: 5,068
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From: New Milford, NJ
not too sure honestly.
i would assume something along those lines. but seeing that you live in California, the most pollution crazed state in America you might go to jail.
haha jk
but really, going catless in Cali probably isn't the best idea. but that's just me.
i would assume something along those lines. but seeing that you live in California, the most pollution crazed state in America you might go to jail.
haha jk
but really, going catless in Cali probably isn't the best idea. but that's just me.
good question. I just got mine installed today thanks to rallycobalt06! He used the same exhaust gasket that was on before. there is no gasket between the turbo and the downpipe.
The CIA downpipe, is definately a WIN! :thumbsup:
The CIA downpipe, is definately a WIN! :thumbsup:
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