Does the exhaust upgrade make a difference?
#81
Banned
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I know im a little late, but to be specific, I called CT Engineering once about the B-Pipe and they told me that when Comptech changed over to CT Engineering, CT decided to not sell it because they did a test with and without the B-Pipe and found that there was no HP gain with it.
#82
Suzuka Master
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I know im a little late, but to be specific, I called CT Engineering once about the B-Pipe and they told me that when Comptech changed over to CT Engineering, CT decided to not sell it because they did a test with and without the B-Pipe and found that there was no HP gain with it.
#86
ah damn so if i have the xlr8 high flow cat i dont need the test pipe? ill have to return it when it arrives if that is the case. Wish i knew more about exhaust.
A test pipe replaces the cat. So you'll want to use one or the other.
This is our exhaust:
Headers-cat------------resonator----(split into two pipes to mufflers)
If you want a complete 2.5" exhaust then you'll have to upgrade all the piping to 2.5". Our stock exhaust is 2.25".
This is our exhaust:
Headers-cat------------resonator----(split into two pipes to mufflers)
If you want a complete 2.5" exhaust then you'll have to upgrade all the piping to 2.5". Our stock exhaust is 2.25".
#88
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Hell I know when I was in Japan for a little bit we never ran with cats on our track cars, it was a waste of time trying to tune with it on there and what not, so we just welded up a solid piece of pipe with flanges was GG after that.
#91
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I have no CAT and i love it and I did feel a difference. The smell at first is horrible but after a while call me crazy but i like it. It stands out it really doesnt bother me.
#92
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I'm getting a 3" catback installed this Saturday so I'll let you know what the butt dyno says. Also, 3 inch on N/A works fine on RSX K20As with bolt ons so why not a motor that is 30% larger. The highest WHP 3.2 CL has a 3 inch exhaust as well. I hope to get on the dyno at some point in early '10 after my 105k service.
#93
Suzuka Master
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I'm getting a 3" catback installed this Saturday so I'll let you know what the butt dyno says. Also, 3 inch on N/A works fine on RSX K20As with bolt ons so why not a motor that is 30% larger. The highest WHP 3.2 CL has a 3 inch exhaust as well. I hope to get on the dyno at some point in early '10 after my 105k service.
#95
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Will do, I dont have a baseline dyno but based on other bolt on CLS6's, we should be able to derive any major differences. If they have a dyno at the shop I am getting the exhaust swapped at, I might consider a before and after to put the issue to rest.
#97
Suzuka Master
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3'' exhaust on a N/A motor is overkill and a waste of money and performance wise. but hey knock yourself out. unless maybe you got a 3.5 swap.
Last edited by p.diddy; 12-02-2009 at 06:31 PM.
#98
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I was poking around and found an interesting article on exhaust theory by Dinan. Feel free to check it out.
http://www.dinancars.com/assets/File...%20Exhaust.pdf
http://www.dinancars.com/assets/File...%20Exhaust.pdf
#99
I really want to personalize the sound of the car and i think Comptech is the way to go.
my question is, are there a noticeable power increase or is it like .. barely anything.
Comptech states 6-8 whp... I'm asking if any of you noticed that?
I want to get the last few HP out of my car, so when i hit the track next year it's GOOD results.
and should I do the XLR8 cat also or what.?
shoot me ur advice... i got a few months to ponder this.
I think I may buy the exhaust new, since I don't like scratches when it comes to CHROME exhaust.
unless anyone wants to sell me their MINT set?
my question is, are there a noticeable power increase or is it like .. barely anything.
Comptech states 6-8 whp... I'm asking if any of you noticed that?
I want to get the last few HP out of my car, so when i hit the track next year it's GOOD results.
and should I do the XLR8 cat also or what.?
shoot me ur advice... i got a few months to ponder this.
I think I may buy the exhaust new, since I don't like scratches when it comes to CHROME exhaust.
unless anyone wants to sell me their MINT set?
#102
YO... we should meet up so i can hear that puppy run?!?!?
meet at a wendy's or something after work.
u makea me jealous with all ur FULL comptech exhaust
I dunno I am addicted to that company, or that name, or maybe just the quality of their shit. But I NEED more comptech, that's all i know
and I'm guessing u got a 6 speed so i'd have to be even more jealous LOL...
in that case CAN YOU TAKE ME FOR A SPINNN?
and we are LINING up our cars on a backroad... see how things pan out :-) I'm curious
meet at a wendy's or something after work.
u makea me jealous with all ur FULL comptech exhaust
I dunno I am addicted to that company, or that name, or maybe just the quality of their shit. But I NEED more comptech, that's all i know
and I'm guessing u got a 6 speed so i'd have to be even more jealous LOL...
in that case CAN YOU TAKE ME FOR A SPINNN?
and we are LINING up our cars on a backroad... see how things pan out :-) I'm curious
#103
Whats up with RDX owners?
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Definately not really loud. Theres a subtle tone when accelerating, louder at full throttle, but near stock at cruising speeds.
#104
Instructor
#105
Suzuka Master
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dont need them for comptechs
not loud at all. I think they are too quiet sometimes and would like to add an aftermarket resonator to replace my mid-muff. Like what was said above, its nearly stock sounding on the freeway and nice and low when accelerating. loudest is about 2-4k. Sounds like a quiet V8, I always look foward to firing my car up. comptech is the quietest sounding exhaust out there, if its too loud then go back to stock because there would be no reason in getting the exhaust other then for sound for this car.
not loud at all. I think they are too quiet sometimes and would like to add an aftermarket resonator to replace my mid-muff. Like what was said above, its nearly stock sounding on the freeway and nice and low when accelerating. loudest is about 2-4k. Sounds like a quiet V8, I always look foward to firing my car up. comptech is the quietest sounding exhaust out there, if its too loud then go back to stock because there would be no reason in getting the exhaust other then for sound for this car.
#106
hence why I wanna do the piping TOO the stockies. including the cat.
I am really debating about the mid muffler change to magnaflow. (i had magnaflow on my probe and u could hear it at the other end of the 1/4 mile when it's at the start line and ur at the finish line)
so the exhaust is pointing the other way and STILL u can hear it NO problem.
I loved it for that type of car, but the CL is no tru sports car so I wanna keep it classy
I am really debating about the mid muffler change to magnaflow. (i had magnaflow on my probe and u could hear it at the other end of the 1/4 mile when it's at the start line and ur at the finish line)
so the exhaust is pointing the other way and STILL u can hear it NO problem.
I loved it for that type of car, but the CL is no tru sports car so I wanna keep it classy
#109
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2.5 inch magnaflow high flow bottle cat and 3 inch cat-back installed yesterday.
The good: I was finally able to open it up today going up a hill leaving my house. Butt dyno says it was well worth it and it made a big difference. Not sure if it's because it's cold and I have summer tires but the tires broke loose at V-Tech and spun through second (which it never did before).
The bad: It's loud, I mean, really loud, lol. Oddly, it seems to get quieter above 3k but I mostly operate in the 1500-2500k range and the drone in that range is killer. Currently it is a 3 inch straight pipe to dual 2.5 inch Magnaflow mufflers so I am adding a Magnaflow 18 inch resonator asap to hopefully reduce the crazy low RPM drone. I want to hear my exhaust but I also want to hear my passengers. Fingers crossed.
Hopefully I can hit a dyno early next year. I'll try to take it up to the altered alliance meet on Thursday.
The good: I was finally able to open it up today going up a hill leaving my house. Butt dyno says it was well worth it and it made a big difference. Not sure if it's because it's cold and I have summer tires but the tires broke loose at V-Tech and spun through second (which it never did before).
The bad: It's loud, I mean, really loud, lol. Oddly, it seems to get quieter above 3k but I mostly operate in the 1500-2500k range and the drone in that range is killer. Currently it is a 3 inch straight pipe to dual 2.5 inch Magnaflow mufflers so I am adding a Magnaflow 18 inch resonator asap to hopefully reduce the crazy low RPM drone. I want to hear my exhaust but I also want to hear my passengers. Fingers crossed.
Hopefully I can hit a dyno early next year. I'll try to take it up to the altered alliance meet on Thursday.
#110
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2.5 inch magnaflow high flow bottle cat and 3 inch cat-back installed yesterday.
The good: I was finally able to open it up today going up a hill leaving my house. Butt dyno says it was well worth it and it made a big difference. Not sure if it's because it's cold and I have summer tires but the tires broke loose at V-Tech and spun through second (which it never did before).
The bad: It's loud, I mean, really loud, lol. Oddly, it seems to get quieter above 3k but I mostly operate in the 1500-2500k range and the drone in that range is killer. Currently it is a 3 inch straight pipe to dual 2.5 inch Magnaflow mufflers so I am adding a Magnaflow 18 inch resonator asap to hopefully reduce the crazy low RPM drone. I want to hear my exhaust but I also want to hear my passengers. Fingers crossed.
Hopefully I can hit a dyno early next year. I'll try to take it up to the altered alliance meet on Thursday.
The good: I was finally able to open it up today going up a hill leaving my house. Butt dyno says it was well worth it and it made a big difference. Not sure if it's because it's cold and I have summer tires but the tires broke loose at V-Tech and spun through second (which it never did before).
The bad: It's loud, I mean, really loud, lol. Oddly, it seems to get quieter above 3k but I mostly operate in the 1500-2500k range and the drone in that range is killer. Currently it is a 3 inch straight pipe to dual 2.5 inch Magnaflow mufflers so I am adding a Magnaflow 18 inch resonator asap to hopefully reduce the crazy low RPM drone. I want to hear my exhaust but I also want to hear my passengers. Fingers crossed.
Hopefully I can hit a dyno early next year. I'll try to take it up to the altered alliance meet on Thursday.
Last edited by OperationDarkie; 12-07-2009 at 11:38 AM.
#112
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Lol, my butt dyno is not laser accurate but I can tell you that it sounds good, feels more powerful in upper RPM range, and there is no apparent loss of tq driving around normally. If anything, the engine is now peppier at low RPM. I understand people being sceptical of whether or not it's beneficial over a 2.5 inch exhaust and honestly, I have no idea if 3 inch is any better. All I am saying is that 3 inch will not perform worse than 2.5 inch and if you're doing custom anyway, why not add a little breathing room for future mods. I definitely dont want to start an argument as I'm not an auto engineer and have no hard numbers to support my "butt dyno", all I am saying is I'm happy with it and I figured people should know.
#116
3.5 psi
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i'm getting the wifey-to-be a new (slightly used) car this month. She drives a 99 sentra that is leaking a bit of oil. It's not really bad, but i'm going to use it as a winter beater now
We're looking at so many cars...CR-V, Rav4, Forrester, MDX (she wishes). But now i get to do a big project to the CL over the winter!
We're looking at so many cars...CR-V, Rav4, Forrester, MDX (she wishes). But now i get to do a big project to the CL over the winter!
#117
Missing My CL-S
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i'm getting the wifey-to-be a new (slightly used) car this month. She drives a 99 sentra that is leaking a bit of oil. It's not really bad, but i'm going to use it as a winter beater now
We're looking at so many cars...CR-V, Rav4, Forrester, MDX (she wishes). But now i get to do a big project to the CL over the winter!
We're looking at so many cars...CR-V, Rav4, Forrester, MDX (she wishes). But now i get to do a big project to the CL over the winter!
btw, i just had a new Rav 4 rental and i knida liked it
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