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Old 09-20-2005, 10:57 AM   #1
TrizzyDizzy
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Join Date: Oct 2003
Chapter/Region: South East
Location: Montgomery, AL
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04 STi Conversion

Default Are Electronic Cut-outs bad for turbo cars?

I want to keep my stock exhaust, i like it quiet. But then again, id also like to scare teh shiet outa a V8 when they rev at me or whatnot. And just the fact of more hp when i want it. So i want to get an electronic cut-out. I plan to place it right before the cat and after the downpipe. Do you think this would be a bad idea?
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Old 09-20-2005, 11:03 AM   #2
Sparks
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Get to modifing the car and you can shoot flames out the muffler (without a cat).

Do you really want that happening under your seat
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Old 09-20-2005, 11:09 AM   #3
bhamwrxman
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Quote:
Originally Posted by Sparks
Get to modifing the car and you can shoot flames out the muffler (without a cat).

Do you really want that happening under your seat
t3h winnAr.
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Old 09-20-2005, 12:38 PM   #4
depreciated
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what would be better is to install a Y-Pipe somewhere and a valve that opens and closes a straight pipe...so your midpipe would look something like this: --<==>--

just put an electronic valve in the middle to switch between catted and straight =)

-Chris
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Old 09-20-2005, 04:30 PM   #5
TrizzyDizzy
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Default

THats more along the lines of what i was talking about. "cut out" is just more known.

I dont plan on modifying this subaru too much. Its just gonna be stage 2 all teh way, possibly some of 3, but thats it.
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Old 09-20-2005, 09:44 PM   #6
DeadBolt Enterprises
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Be careful, too little backpressure can cause boost creep if you use it while driving/under load.
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Old 09-20-2005, 10:15 PM   #7
TrizzyDizzy
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Default

Ok, cool. So is there a way i can prevent it from creepin, while still using a cutout?
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Old 09-20-2005, 10:20 PM   #8
roburXunitas
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Quote:
Originally Posted by DeadBolt Enterprises
Be careful, too little backpressure can cause boost creep if you use it while driving/under load.
what is boost creep?
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Old 09-20-2005, 11:36 PM   #9
STiTuner
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I suggest putting the cutout BEFORE the turbo....
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Old 09-20-2005, 11:49 PM   #10
dropmech
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Quote:
Originally Posted by STiTuner
I suggest putting the cutout BEFORE the turbo....
Now, you KNOW there are people around here who would actually do that
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Old 09-21-2005, 08:38 AM   #11
Rated R1
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Old 09-21-2005, 08:38 AM   #12
Calamity Jesus
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Quote:
Originally Posted by dropmech
Now, you KNOW there are people around here who would actually do that
Some would even go so far as to call it a wastegate.

oh.. wait..
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Old 09-21-2005, 10:55 AM   #13
TrizzyDizzy
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Default

Wait, i can do that? haha, i kid, i kid. Hmm, sounds like it could be an awesome external wastegate though!

Well, i think im gonna give it a try. And i know to get alot of heat wrap to wrap the wires and such, so i doesnt fry on me. Its basically gonna be a Y-pipe right before the cat. And it electronically opens to aim behind the front wheels.
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Old 09-21-2005, 12:17 PM   #14
crash
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Default

Also keep in mind that it's pretty much impossible to have a cut out that doesn't leak...
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Old 09-21-2005, 12:30 PM   #15
WJM
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We have a customer that has a cutout on his EVO...

its been a trouble item...and it does leak a teeny bit when 'closed'....

I dont recommend them, but if thats what you want, then we can do it.
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Old 09-21-2005, 07:22 PM   #16
TrizzyDizzy
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04 STi Conversion

Default

I figured it would leak out air, but would that cause any sort of problem really?
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Old 09-21-2005, 10:27 PM   #17
robert trabulsi
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Default cut out

i had a qtp cut out for 2 years on ny 2002 wrx and no leaks
and nothing sounds meaner
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Old 09-21-2005, 10:46 PM   #18
flwrx
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i love my cutout. It definitely leaks a little when closed, but not bad...and no creep issues.
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Old 09-22-2005, 10:56 AM   #19
TrizzyDizzy
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Default

I mean, i know its gotta leak just a little air. But, would that cause any problem really? It just wont be quite as quiet as before.
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Old 09-22-2005, 12:19 PM   #20
QTP
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There is no down side to a cutout on a turbo car. Turbo cars when properly tuned do not want any back pressure. We see an average of 1.5psi increase open vs closed. Call us and we help you out on the location which is best.
Quick Time Performance
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Old 09-26-2005, 01:23 PM   #21
04blkbeauty
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^^^

Don't do business w/ this guy. He's a shady businessman! Ask around and you will find out.
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