Muffler
01-23-2007 | 03:15 PM
#32
Three Wheelin'
Joined: Mar 2002
Posts: 1,555
Likes: 0
From: NY
[QUOTE]If I do not replace that pipe with a 3" now is there any benefit from going with a 3" in/out muffler as opposed to a 2.5" in/out for the pipe I have on there now?
What if any gains would there be from going with a 3" pipe between the cat and muffler? how much for just that pipe?
QUOTE]
There isn’t much of a gain, if any going to a 3” from the cat back. Most of the gain is from the test pipe. If you just want the sound I say stick with the muffler and get a test pipe down the road. A full 3” can give you as much as 10%, but I don’t think you would see that much in a relatively stock car.
As mentioned you do loose some mid range going to a 3” as it takes longer to spool the turbo with less backpressure.
What if any gains would there be from going with a 3" pipe between the cat and muffler? how much for just that pipe?
QUOTE]
There isn’t much of a gain, if any going to a 3” from the cat back. Most of the gain is from the test pipe. If you just want the sound I say stick with the muffler and get a test pipe down the road. A full 3” can give you as much as 10%, but I don’t think you would see that much in a relatively stock car.
As mentioned you do loose some mid range going to a 3” as it takes longer to spool the turbo with less backpressure.
01-23-2007 | 03:21 PM
#34
Three Wheelin'
Joined: Mar 2002
Posts: 1,555
Likes: 0
From: NY
for a thousand bucks you can get speedforceracing or lindsay's cat back system, plus a cat plus installation, and have some $ left over i think.
01-23-2007 | 03:34 PM
#36
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: May 2001
Posts: 10,227
Likes: 123
From: Mile High
Originally Posted by Wormhole
Not for a SS system. Lindey has a cheap steel one, but I don't think you will find a cheaper complete SS sytem.
01-23-2007 | 03:38 PM
#37
Thread Starter
Race Car
Joined: Oct 2003
Posts: 3,907
Likes: 0
From: Long Island, NY
[QUOTE=Wormhole]
Last question and I will make my decision: Should I get a 3" muffler and use a reducer to install to my 2.5" pipe. Would there be a loss of power with just the 3" mufler?
If I do not replace that pipe with a 3" now is there any benefit from going with a 3" in/out muffler as opposed to a 2.5" in/out for the pipe I have on there now?
What if any gains would there be from going with a 3" pipe between the cat and muffler? how much for just that pipe?
QUOTE]
There isn’t much of a gain, if any going to a 3” from the cat back. Most of the gain is from the test pipe. If you just want the sound I say stick with the muffler and get a test pipe down the road. A full 3” can give you as much as 10%, but I don’t think you would see that much in a relatively stock car.
As mentioned you do loose some mid range going to a 3” as it takes longer to spool the turbo with less backpressure.
What if any gains would there be from going with a 3" pipe between the cat and muffler? how much for just that pipe?
QUOTE]
There isn’t much of a gain, if any going to a 3” from the cat back. Most of the gain is from the test pipe. If you just want the sound I say stick with the muffler and get a test pipe down the road. A full 3” can give you as much as 10%, but I don’t think you would see that much in a relatively stock car.
As mentioned you do loose some mid range going to a 3” as it takes longer to spool the turbo with less backpressure.
01-23-2007 | 03:49 PM
#38
Burning Brakes
Joined: Nov 2003
Posts: 966
Likes: 0
From: Mahopac, NY
Originally Posted by jeeper31
Like?
(What are you doing here? heh heh)
(What are you doing here? heh heh)
I still like to check in on your guys....besides.....not as much action on the 911 forum.
01-23-2007 | 03:53 PM
#39
Three Wheelin'
Joined: Mar 2002
Posts: 1,555
Likes: 0
From: NY
Tom, if you add the testpipe and catback from SFR it is over 1K, unless I was missing something else. I was taking about a complete SS system which also should include the downpipe, I think SFR has that for 300 alone.
Dan, a 3" muffler alone won't make much of a difference. The stock muffler is actually a straight through design.
Dan, a 3" muffler alone won't make much of a difference. The stock muffler is actually a straight through design.
01-23-2007 | 03:55 PM
#40
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: May 2001
Posts: 10,227
Likes: 123
From: Mile High
Originally Posted by Wormhole
Tom, if you add the testpipe and catback from SFR it is over 1K, unless I was missing something else. I was taking about a complete SS system which also should include the downpipe, I think SFR has that for 300 alone.
Dan, a 3" muffler alone won't make much of a difference. The stock muffler is actually a straight through design.
Dan, a 3" muffler alone won't make much of a difference. The stock muffler is actually a straight through design.
01-23-2007 | 03:55 PM
#41
Official Bay Area Patriot
Fuse 24 Assassin
Rennlist Member
Fuse 24 Assassin
Rennlist Member
Joined: Nov 2001
Posts: 31,653
Likes: 119
I didn't report any gains or losses with the Flowmaster Super 40 2.5" However, it did sound a lot nice. It's a gas mileage killer for the straight through mufflers. Hope that helps Jeeper. Oh and on a side note, I used to have a straight through Dynomax on a very good engined 1984 car before someone T-boned it. I took that muffler right off when I felt the loss in pickup!
01-23-2007 | 04:06 PM
#42
Drifting
Joined: Oct 2002
Posts: 2,373
Likes: 1
From: Memphis, TN
With a turbo, I'd go with a 3" all the way back if possible. Do you have any mods to the engine or do you plan on any mods? At least a 3" down pipe would help it breathe better if nothign else.
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
01-23-2007 | 04:19 PM
#43
Thread Starter
Race Car
Joined: Oct 2003
Posts: 3,907
Likes: 0
From: Long Island, NY
Originally Posted by RMills944
With a turbo, I'd go with a 3" all the way back if possible. Do you have any mods to the engine or do you plan on any mods? At least a 3" down pipe would help it breathe better if nothign else.
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
it is going on my turbo. it's funny but the car seems really slow on the low end. i have to realize this when pulling out into traffic. it doesn't have the pep my 944S had
01-23-2007 | 07:36 PM
#44
AutoX
Joined: Oct 2006
Posts: 13
Likes: 0
Originally Posted by RMills944
With a turbo, I'd go with a 3" all the way back if possible. Do you have any mods to the engine or do you plan on any mods? At least a 3" down pipe would help it breathe better if nothign else.
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
I know with my TDI, a down pipe and 2.5" or 3" exhaust help keep the engine gas temps down and that's on just a little 1.9. Letting the turbo breathe is a good thing as long as you don't lose all backpressure. You need something for the exhaust to scavenge with, but a lot less pressure is necessary for a turbo. Everyone recommending sizes for piping needs to keep in mind this is going on a turbo, not the NA in your signature.
For a NA, I recommend a 2.5"
for a turbo I recommend a 3"
