Is 3" all around too much?
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TRELOS
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From: S. WPB Fla.
Is 3" all around too much?
I am looking into a 3" cat-back exhaust for our cars. I read up on the Greddy cat back and they only have a 60mm pipe, translated thats only 2.3", not even a 2.5 . Some people also said that 3" maybe alittle too excessive on our cars w/o a Turbo or SC? I can understand seeign a loss in back-pressure, but wouldn't aftermarket mufflers cover the loss of back pressure?
Juker008
Juker008
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Re: Is 3" all around too much?
Originally posted by Juker008
I am looking into a 3" cat-back exhaust for our cars. I read up on the Greddy cat back and they only have a 60mm pipe, translated thats only 2.3", not even a 2.5 . Some people also said that 3" maybe alittle too excessive on our cars w/o a Turbo or SC? I can understand seeign a loss in back-pressure, but wouldn't aftermarket mufflers cover the loss of back pressure?
Juker008
I am looking into a 3" cat-back exhaust for our cars. I read up on the Greddy cat back and they only have a 60mm pipe, translated thats only 2.3", not even a 2.5 . Some people also said that 3" maybe alittle too excessive on our cars w/o a Turbo or SC? I can understand seeign a loss in back-pressure, but wouldn't aftermarket mufflers cover the loss of back pressure?
Juker008
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TRELOS
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From: S. WPB Fla.
Would the use of 3" also cause missfires?
And about the mufflers, if I were to install a muffler box with a tip that had a 2.25" neck into a 3"tip wouldn't that give me enough back pressure?
Juker008
And about the mufflers, if I were to install a muffler box with a tip that had a 2.25" neck into a 3"tip wouldn't that give me enough back pressure?
Juker008
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TRELOS
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From: S. WPB Fla.
2001CL,
As for the cat, as we both know we have no more emissions. But I am totally against runnign without a cat all the time. If I were to have a custom exhaust made I would have the cat replaced with a removable straight pipe. That way when I got to the track I can remove the cat and replace it with a straight pipe.
moomaster_99,
The exhaust thatI am thinking of is of larger diameter, with the resonator removed, and plugging the ends with performance mufflers.
But like I said before would a 2.25" neck on a 3" tip be enough back pressure?
Juker008
As for the cat, as we both know we have no more emissions. But I am totally against runnign without a cat all the time. If I were to have a custom exhaust made I would have the cat replaced with a removable straight pipe. That way when I got to the track I can remove the cat and replace it with a straight pipe.
moomaster_99,
The exhaust thatI am thinking of is of larger diameter, with the resonator removed, and plugging the ends with performance mufflers.
But like I said before would a 2.25" neck on a 3" tip be enough back pressure?
Juker008
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From: Somewhere between here and there, yet neither.
Originally posted by JRock
Well that's sort of a logical falacy since if the note is changing, so is the flow, but it's true it's not enough to matter.
Well that's sort of a logical falacy since if the note is changing, so is the flow, but it's true it's not enough to matter.
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TRELOS
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From: S. WPB Fla.
Originally posted by rydewitme
i have 2.5" piping and i have enough back pressure, especially in second and good low end
i have 2.5" piping and i have enough back pressure, especially in second and good low end
Custom exhaust or aftermarket? How loud is ur 2.5" ? I am asuming that it is 2.5" all around is that correct?
Juker008
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From: .
Originally posted by Juker008
Plz explain.
Juker008
Plz explain.
Juker008
Don't worry about it, just trying to make sure moomaster isn't defying logic since he has trouble with that sometimes.
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TRELOS
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From: S. WPB Fla.
Originally posted by JRock
Oh I was just pointing out that it's logically impossible to say the flow hasn't changed when the sound has changed but nothing new was done to the engine.
Don't worry about it, just trying to make sure moomaster isn't defying logic since he has trouble with that sometimes.
Oh I was just pointing out that it's logically impossible to say the flow hasn't changed when the sound has changed but nothing new was done to the engine.
Don't worry about it, just trying to make sure moomaster isn't defying logic since he has trouble with that sometimes.
Juker008
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From: Ninth Gate & So Cal
http://www.nsxprime.com/FAQ/Miscella...austtheory.htm
http://www.uucmotorwerks.com/html_pr...torquemyth.htm
http://www.burnsstainless.com/Xdesign/xdesign.html
http://www.hondalife.com/articles/Ba...nal%20Area.htm
tidbit:
http://www.uucmotorwerks.com/html_pr...torquemyth.htm
http://www.burnsstainless.com/Xdesign/xdesign.html
http://www.hondalife.com/articles/Ba...nal%20Area.htm
tidbit:
Code:
Here are the numbers for 16g tubing: OD (in.)....ID (in.)...Area....%Increase......HP.......HP/in^2 2.25........2.120.......3.53.....0%...............200.......56.66 2.50........2.370.......4.41.....25%..............275.......62.34 2.75........2.620.......5.39.....22%..............318.......59.00 3.00........2.870.......6.47.....20%..............400.......61.83