anybody have those electronic exhaust cutouts?
#1
anybody have those electronic exhaust cutouts?
been in 2 cars that have em, s2000, and volvo s40
know it doesn't do a whole lot, just increase decible noise and little performance but wonderin if anybody have it on their max
http://forums.nasioc.com/forums/show....php?t=1006623
http://www.badlanzhpe.com/
know it doesn't do a whole lot, just increase decible noise and little performance but wonderin if anybody have it on their max
http://forums.nasioc.com/forums/show....php?t=1006623
http://www.badlanzhpe.com/
#3
One org member at our last dyno meet had it. He opened the cut-out via a switch and dyno'd. No gains, you are just eliminating all that back pressure that hurts performance. And the noise is just annoying.
I wouldn't waste my time on that.
I wouldn't waste my time on that.
#4
Originally Posted by DR-Max
One org member at our last dyno meet had it. He opened the cut-out via a switch and dyno'd. No gains, you are just eliminating all that back pressure that hurts performance. And the noise is just annoying.
I wouldn't waste my time on that.
I wouldn't waste my time on that.
#6
Originally Posted by g4nismo
been in 2 cars that have em, s2000, and volvo s40
know it doesn't do a whole lot, just increase decible noise and little performance but wonderin if anybody have it on their maxhttp://forums.nasioc.com/forums/show....php?t=1006623
http://www.badlanzhpe.com/
know it doesn't do a whole lot, just increase decible noise and little performance but wonderin if anybody have it on their maxhttp://forums.nasioc.com/forums/show....php?t=1006623
http://www.badlanzhpe.com/
When we dynoed my car at JWT the difference was 21 HP more when the cutout was opened!
You guys should not make assertions about mods unless you know for sure what you are talking about. There is way too much misinformation on these forums.
#7
Originally Posted by i30krab
I have the qtp 3" cutout http://www.quicktimeperformance.com/
When we dynoed my car at JWT the difference was 21 HP more when the cutout was opened!
When we dynoed my car at JWT the difference was 21 HP more when the cutout was opened!
#8
Supporting Maxima.org Member
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
Originally Posted by DR-Max
You loose low end with it open as well on NA.
It still amazes me that people respond to threads when they have no idea what they are talking about.
#9
Originally Posted by 96sleeper
not true. You loose low end when your exhaust is too big and you lose velocity. I gained 6hp and 2 ft-lbs on the dyno with zero loss of low end. That was on the 3.0 engine. It was over 10hp with the 3.5 engine.
I like what their website said:
Each car differs on the horsepower/torque gain. It all depends on your car and what modifications you have. You can gain as little as 5 horsepower on a car that already has a high flow exhaust system to a car that needs no back pressure and gain as much as 20-30hp. It all depends on your car. But it is a guarantee that you will get all the volume you want!
They guarantee the noise volume.
Originally Posted by 96sleeper
It still amazes me that people respond to threads when they have no idea what they are talking about.
#10
Supporting Maxima.org Member
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
You can't see the difference between a bigger exhaust, and one that is the same size and just more free flowing? With the cutout that is the correct size, you maintain exhaust stream velocity which does not hurt low end. A 3 inch exhaust would hurt you because it kills the velocity, which does hurt low end. You need to do a little research to fully understand it.
I have 3 dyno graphs posted on my cardomain page. None is a direct comparison between open and closed cutout, but I have tried it every time I have dynoed and I always make more power.
I have 3 dyno graphs posted on my cardomain page. None is a direct comparison between open and closed cutout, but I have tried it every time I have dynoed and I always make more power.
#11
I'll chime in here even though i have no cutout. Everytime i go to the drag strip i undo my cat and run open y-pipe my time always improve by 2 tenths.
I have thought about getting a test pipe but i don't like how long they take to open and close. It's not a big deal for me to unbolt the cat either.
I have thought about getting a test pipe but i don't like how long they take to open and close. It's not a big deal for me to unbolt the cat either.
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