Electric Exhaust Cut Out

[Field93]

Does anyone have any experience with this on a 93?

[wtfwill]

i do believe a member here used a mechanical cut off.. like a butterfly valve.

it didn't sound that great though.. and in a turbo'd car like ours, back pressure is pretty important.. to a degree. i don't see any performance or audible (much less visible) improvement.

[titeness]

http://www.saabcentral.com/forums/sh...d.php?t=125603

It was fun for maybe a month, it still is at times, but it really doesn't have a purpose. It's very loud when open, not particurlarly a cool sounding loud either, but more like diesel truck loud.

[Wilder]

You dont need backpressure with a turbo engine.

On a 9-3 ( an a lot of other car) you will need to instal you cute out after your second O2 sensor ( read after your cat) so you will only bypass your rear muffler.

And your sound will be like this (no muffler on my car).

http://s78.photobucket.com/albums/j8...t=MVI_1213.flv

It's quietter than a stock Srt-4....

[Field93]

Forgive my ignorance, but what would installing an cutout include? I imagine it requires tampering with the pipe leading to the muffler.

[wtfwill]

all you're doing is basically making a cut/blocking off the pipe that leads to the muffler and installing a diverter valve for the ehaust fumes to exit from. it's the same sound as basically reomving the entire exhaust system from the down pipe back.

it's not safe, legal or really that smart. i guess it's kind of safe.. but you will probably shoot some flames and risk getting sick from the exhaust fumes having no where to go.

[Discreet]

Originally Posted by wtfwill

and in a turbo'd car like ours, back pressure is pretty important.. to a degree. i don't see any performance or audible (much less visible) improvement.

Disagree with both of these comments....
I've seen dynos where a cutout proves to make more power simply by relieving pressure. Have had one myself on another car that made a quite a bit a difference in power and spool up time. I will say most difference was noticed jumping from my cars stock psi of 6 to 15. Would be interesting to see what it does on this car.

If these things wouldn't do anything would so many tuners have them installed....from corvettes, subbies, Evo's to muscle cars.

[wtfwill]

if you say so.. i know turbos don't exactly like back pressure, but i can't imagine it being the safest albeit long-term mod to improve hp for your engine on the whole..

[turbosupra12]

the point of cutouts are nott o drive around with them open all the time. it's for when you need more power. ie. you're at the track, etc. it just means no exhaust restriction... so i'd say there's a point of them.

cutouts can do quite a bit, dpeending onthe car... someone should give it a shot with a saab.. who knows, might get a few hp when it's open.

[wtfwill]

Originally Posted by turbosupra12

the point of cutouts are nott o drive around with them open all the time. it's for when you need more power. ie. you're at the track, etc. it just means no exhaust restriction... so i'd say there's a point of them.

cutouts can do quite a bit, dpeending onthe car... someone should give it a shot with a saab.. who knows, might get a few hp when it's open.

of course, but i was commenting on the member here who had a manual one. which meant he had to crawl under his car and cover up the cut out every time. an electronic one would be neat, i guess.

[turbosupra12]

Originally Posted by wtfwill

of course, but i was commenting on the member here who had a manual one. which meant he had to crawl under his car and cover up the cut out every time. an electronic one would be neat, i guess.

yeah true enough.. guess manual ones would only be good if you were running at the track.