Exhaust cutouts??
Thread Starter
Intermediate
Joined: May 2009
Posts: 47
Likes: 1
Exhaust cutouts??
I still love my 95 vette... Thinking about exhaust cutouts, just a little.
Sure I will gain noise, will i gain any hp?
Are the electronic cut out kits the way to go here??
Your thoughts?
Sure I will gain noise, will i gain any hp?
Are the electronic cut out kits the way to go here??
Your thoughts?
Safety Car
Joined: Aug 2013
Posts: 4,427
Likes: 603
From: Minneapolis Mn
My experience with cutouts go back about 45-50 years. Back then it made sense on some vehicles on the track, reduced back pressure. Today I'm not so sure with all the electronics involved in current engines, it's far more balanced than it used to be.
As far as electric or not - how are you about getting burnt removing and putting on a cap on the cutout and when the cops pull you over for running open exhaust on the street (if you do that)? They do (did) get hot enough to leave a nice burn on your hand or arm if you got too close to the wrong thing (DAMHIK).
I believe what's on units like the C7's, it's all downstream of the emissions stuff and basically bypasses the mufflers when opened so it doesn't screw up the emissions settings and how the engine runs. Probably want something like that if you don't want to screw up the way your engine runs.
Most of this is a guess on my part. I'm sure someone more knowledgeable than me will chime in on your subject.
As far as electric or not - how are you about getting burnt removing and putting on a cap on the cutout and when the cops pull you over for running open exhaust on the street (if you do that)? They do (did) get hot enough to leave a nice burn on your hand or arm if you got too close to the wrong thing (DAMHIK).
I believe what's on units like the C7's, it's all downstream of the emissions stuff and basically bypasses the mufflers when opened so it doesn't screw up the emissions settings and how the engine runs. Probably want something like that if you don't want to screw up the way your engine runs.
Most of this is a guess on my part. I'm sure someone more knowledgeable than me will chime in on your subject.
Melting Slicks
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
Noise? Sure, if that is your thing. Performance? You won't get much with just a cutout exhaust. If you're going to open up the exhaust, you need to open up the intake side as well, which can be costly (TB, intake manifold, hot cam, etc). Not much point in letting out more air if you aren't allowing in more air as well... that's where you will get a performance boost.
I'm sure someone will roast me but that's the basics...
more air in + more air out = more power. At some point in this progression, more fuel will also be needed beyond what the stock injectors can provide.
I'm sure someone will roast me but that's the basics...
more air in + more air out = more power. At some point in this progression, more fuel will also be needed beyond what the stock injectors can provide.
Advanced
Joined: Sep 2014
Posts: 59
Likes: 3
From: Berlin
cutouts in front of KAT
Hello,
does anybody know if there is any problem when I install electric cutouts into the exhaust pipes between the pre-Kats and the main Kat?
Will the engine run properly and/ or will the Kat not be damaged if the cutouts are open?
It's a '88 with L98 engine with 3 Kats.
Thx for your help
does anybody know if there is any problem when I install electric cutouts into the exhaust pipes between the pre-Kats and the main Kat?
Will the engine run properly and/ or will the Kat not be damaged if the cutouts are open?
It's a '88 with L98 engine with 3 Kats.
Thx for your help
Instructor
Joined: Jul 2017
Posts: 105
Likes: 2
From: Painesville, Ohio
Hello,
does anybody know if there is any problem when I install electric cutouts into the exhaust pipes between the pre-Kats and the main Kat?
Will the engine run properly and/ or will the Kat not be damaged if the cutouts are open?
It's a '88 with L98 engine with 3 Kats.
Thx for your help
does anybody know if there is any problem when I install electric cutouts into the exhaust pipes between the pre-Kats and the main Kat?
Will the engine run properly and/ or will the Kat not be damaged if the cutouts are open?
It's a '88 with L98 engine with 3 Kats.
Thx for your help
You might want to consider the heat where it dumps, and if the heat will effect anything around it, like your feet. (lol)
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Wouldnt put it too close to the 02 sensor. Honestly I think its a waste of time.
Get some long tube headers and a true dual exhaust for a real gain.
Get some long tube headers and a true dual exhaust for a real gain.
Last edited by cv67; Apr 13, 2018 at 08:59 AM.
Advanced
Joined: Sep 2014
Posts: 59
Likes: 3
From: Berlin
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Race Director
Joined: Apr 2003
Posts: 17,699
Likes: 1,667
From: moraga ca
If you want noise, go with cutouts. It's easier to put them before the mufflers instead of before the converters. If you want power, go with long tubes. You'll only gain a couple of hp over stock with cutouts.
