Straight pipes
09-19-2006 | 02:34 PM
#12
Thread Starter
Registered User
Joined: Feb 2004
Posts: 1,714
Likes: 0
From: Yea
Originally Posted by importkid,Sep 19 2006, 02:25 PM
back pressure
The goal is to gain power, lower weight, keep stock look. Sound (loud) is an unfortunate addition. The stock look would help in warding off the popo.
An invidia would just be loud with no benefits.
The reason for all this is I rather modify the stock exhaust for gains than spend ~$600-$2000 for an exhaust that will give me the same benefits if not less performance even.
09-19-2006 | 02:41 PM
#13
Registered User
Joined: Feb 2006
Posts: 518
Likes: 0
From: Ellicott city, MD
It's more to do with the flow speed of the exhaust gases. My car feels noticebly faster at higher rpm when running open header after the testpipe versus with the connected stock exhaust. At the low rpm it's definetly losing a few ponies.
09-19-2006 | 02:48 PM
#15
Thread Starter
Registered User
Joined: Feb 2004
Posts: 1,714
Likes: 0
From: Yea
Originally Posted by xman03,Sep 19 2006, 02:41 PM
It's more to do with the flow speed of the exhaust gases. My car feels noticebly faster at higher rpm when running open header after the testpipe versus with the connected stock exhaust. At the low rpm it's definetly losing a few ponies.
09-19-2006 | 04:02 PM
#18
Registered User
Joined: Apr 2004
Posts: 2,029
Likes: 1
From: Tampa
On a street car, running no mufflers is not the best idea.
1) You lose low end (i've proven that in my own car, although an Integra)
2) You can attract unwanted attention (this didn't happen with my car, cops would look but never got pulled over).
3) It's way too loud. I would let people borrow my car to go get some beer and hear it drive to the gas station, shut off, then start and drive back. The gas station was 3/4-1 mile away.
4) Depending on where you terminate the piping, you'll have one hell of a resonance, about 3k-3.5k in my integra, the car was completely and utterly annoying at that RPM, 4k was nice, so I went 80mph everywhere unless it was a 40mph or lower speed zone.
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.
1) You lose low end (i've proven that in my own car, although an Integra)
2) You can attract unwanted attention (this didn't happen with my car, cops would look but never got pulled over).
3) It's way too loud. I would let people borrow my car to go get some beer and hear it drive to the gas station, shut off, then start and drive back. The gas station was 3/4-1 mile away.
4) Depending on where you terminate the piping, you'll have one hell of a resonance, about 3k-3.5k in my integra, the car was completely and utterly annoying at that RPM, 4k was nice, so I went 80mph everywhere unless it was a 40mph or lower speed zone.
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.
09-19-2006 | 04:44 PM
#19
Registered User
Joined: Aug 2006
Posts: 76
Likes: 0
From: Corona, CA
Originally Posted by Dave-ROR,Sep 19 2006, 05:02 PM
1) You lose low end (i've proven that in my own car, although an Integra)
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.
If you guys have ever taken a look at a/f ratio plot before and after converting to something like open header or a larger exhaust or one with less restrictions, you will see how the AFR curve is affected.
09-19-2006 | 05:12 PM
#20
Thread Starter
Registered User
Joined: Feb 2004
Posts: 1,714
Likes: 0
From: Yea
Originally Posted by Dave-ROR,Sep 19 2006, 04:02 PM
On a street car, running no mufflers is not the best idea.
1) You lose low end (i've proven that in my own car, although an Integra)
2) You can attract unwanted attention (this didn't happen with my car, cops would look but never got pulled over).
3) It's way too loud. I would let people borrow my car to go get some beer and hear it drive to the gas station, shut off, then start and drive back. The gas station was 3/4-1 mile away.
4) Depending on where you terminate the piping, you'll have one hell of a resonance, about 3k-3.5k in my integra, the car was completely and utterly annoying at that RPM, 4k was nice, so I went 80mph everywhere unless it was a 40mph or lower speed zone.
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.
1) You lose low end (i've proven that in my own car, although an Integra)
2) You can attract unwanted attention (this didn't happen with my car, cops would look but never got pulled over).
3) It's way too loud. I would let people borrow my car to go get some beer and hear it drive to the gas station, shut off, then start and drive back. The gas station was 3/4-1 mile away.
4) Depending on where you terminate the piping, you'll have one hell of a resonance, about 3k-3.5k in my integra, the car was completely and utterly annoying at that RPM, 4k was nice, so I went 80mph everywhere unless it was a 40mph or lower speed zone.
On the plus side, I did gain 5whp from ~6500 up. And lost about 25whp 4000-5500.
Needless to stay, I am running a regular exhaust now.