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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 04-11-2009, 07:44 PM   #1
francone13
 
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Exhaust Valve Bypass

What does everyone think about installing one of these?

http://www.dmhperformance.com/
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Old 04-11-2009, 08:12 PM   #2
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i cant wait to get one...
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Old 04-11-2009, 08:14 PM   #3
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speakers are crappy but i think i would have to hear it in real life
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Old 04-11-2009, 08:15 PM   #4
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wondering how legal it would b lol
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Old 04-11-2009, 08:20 PM   #5
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Only if your building an offroad racer. Will void your engine warranty and it not street legal.

It's a bad idea for a new car.
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Old 04-11-2009, 08:23 PM   #6
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Never had one personally.

As with all exhaust cutouts they are subject to local laws... I know here they are not illegal as long as the are manually operated, i.e. not vacuum or electronically controled. As for sound, depending on where they are placed, they sounds like open exhaust. If you will be racing they are fine, although with newer cars with little to no mods, they might actually hurt performance. For the 99% of the time you aren't at the track, I would stick with an aftermarket catback.
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Old 04-11-2009, 08:24 PM   #7
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cops around here would write you up in a heartbeat. According to the law any modification to the exhaust system is illegal
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Old 04-11-2009, 08:29 PM   #8
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GM has addressed lot of the bottlenecks with emissions. Both engines would not have good HP without a good flowing intake and exhaust. It's not a performance bottleneck like it was back in the day.
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Old 04-11-2009, 08:31 PM   #9
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Thanks guys...im probably gonna stick wit an after market cat back
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Old 04-11-2009, 08:42 PM   #10
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exhaust valve bypass.... never heard a cutout called that before.
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Old 04-11-2009, 08:49 PM   #11
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Once again, the only problem with these is the possibility of the motor getting burnt out and issues with it sealing properly when closed.

The main problem is that the driver has no way to tell when the butterfly is closed and will continue to hold the switch in the 'Close' position even after the butterfly has made contact, thus overloading the electric motor.

They work great for a while, but eventually they will burn out unless they have an automatic sensor that stops the current when the valve is closed.

I think either going with a regular cutout with the wing nuts or a cable operated version is a little more reliable...(or maybe making a setup like they have on the Vette using the GM parts)
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Old 04-11-2009, 09:16 PM   #12
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I can speak with experience.

I have electric cutouts on my '67 Camaro. The style you are listing has it share of sticking problems. Over time, You'll find you will find that you have to work them by hand while opening and shuting them repeatly with the button to un-stick them. The butterfly style just seems to build up carbon real bad. Sometimes only one side will open (or close) and you won't like the sound of that! If your going to get them, then spend the extra money and get the "DOUGS". They are built to last much longer. You will enjoy them much better than "any others out there", because they are built with a "Rack and pinion drive mechanism".

Be prepared for the price though!


This is a much better performing set. Follow the link below for a set of "Doug's 304 Stainless Steel Electric Exhaust Cutouts".

http://www.jegs.com/p/Doug%27s+Headers/759640/10002/-1
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Old 04-11-2009, 09:25 PM   #13
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Quote:
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I can speak with experience.

I have electric cutouts on my '67 Camaro. The style you are listing has it share of sticking problems. Over time, You'll find you will find that you have to work them by hand while opening and shuting them repeatly with the button to un-stick them. The butterfly style just seems to build up carbon real bad. Sometimes only one side will open (or close) and you won't like the sound of that! If your going to get them, then spend the extra money and get the "DOUGS". They are built to last much longer. You will enjoy them much better than "any others out there", because they are built with a "Rack and pinion drive mechanism".

Be prepared for the price though!


This is a much better performing set. Follow the link below for a set of "Doug's 304 Stainless Steel Electric Exhaust Cutouts".

http://www.jegs.com/p/Doug%27s+Headers/759640/10002/-1



to the Doug's cutouts. they rock all night long.
but they are expeeeeeeeeensive.
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Old 04-11-2009, 10:12 PM   #14
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Which brand is it that closes the opening to the tailpipes at the same time it opens the cutout? It also can be dialed in to partial openings. I read it somewhere on these posts but did not write down the name of the manufacturer.
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Old 04-12-2009, 04:26 PM   #15
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Which brand is it that closes the opening to the tailpipes at the same time it opens the cutout? It also can be dialed in to partial openings. I read it somewhere on these posts but did not write down the name of the manufacturer.
http://www.camaro5.com/forums/showthread.php?t=7027
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Old 04-12-2009, 04:40 PM   #16
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to the Doug's cutouts. they rock all night long.
but they are expeeeeeeeeensive.
dude have u seen the prices of catbacks? borla is selling their set of shiny pipes for a ridiculous $1500+S&H. The borla catback for the 00 camaro SS was only $600. screw those price gouging scumbags. Ill probably end up getting KOOKS LT's, off road X pipe with cut outs installed somewhere in between the stock catback and xpipe. DOUG's look good thanks for the link.
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Old 04-12-2009, 09:45 PM   #17
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I drove a escalade with that and its pretty freakin cool, had a button in the cup holder and with one click it would open and close.
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Old 04-12-2009, 11:53 PM   #18
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Only if your building an offroad racer. Will void your engine warranty and it not street legal.

It's a bad idea for a new car.
How is this different from any other exhaust modification that couldn't be proven to cause catastrophic engine failure?
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Old 04-13-2009, 02:10 AM   #19
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My buddy has a 99 WS6 with electrical cut outs like these. I'll see if I can post pics and maybe a video with what it sounds like up soon.
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Old 04-13-2009, 04:23 PM   #20
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Quote:
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dude have u seen the prices of catbacks? borla is selling their set of shiny pipes for a ridiculous $1500+S&H. The borla catback for the 00 camaro SS was only $600. screw those price gouging scumbags. Ill probably end up getting KOOKS LT's, off road X pipe with cut outs installed somewhere in between the stock catback and xpipe. DOUG's look good thanks for the link.
the borla catback for the 00 camaro was also a two into one into two setup. with this car being true duals from the factory, it raises the price.... to an extent. I do think that $1500 is a bit pricey. which is why I wont be going with them.
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Quote:
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Nobody makes CamaroSpike happy. You just disgust him a little less than other people.

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Read that link that Spike posted, it'll tell you everything you need to know.
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Post count is truly an accurate measure of how cool someone is on the Internet.
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Originally Posted by Greg Norris View Post
I piss excellence
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Quote:
Originally Posted by BowtieGuy View Post
Nobody makes CamaroSpike happy. You just disgust him a little less than other people.
"You can think I'm wrong, but that's no reason to quit thinking.”
Quote:
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Old 04-14-2009, 09:07 AM   #21
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Thank you. That is exactly the type of system I was looking for. (the one by noweeds.net) PM sent.

Link to pics of stock exhaust system:
http://www.ls1tech.com/forums/2010-c...age-shots.html
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