So... about some electric cutouts.... I wanna make some.

[HooverSA]

I have always been kinda intrigued by the cutouts on older cars and how mean they sound and how they get better low end torque with them open... I recently met someone with "electric cutouts" on his 350z. Granted its twin turbo and its mainly for when he races due to the pressure in his pipe. I got to looking at it and i swear to you that i looked like a throttle body with a headlight motor to move it. I found a few kits online and I am considering buying two of them at some point in time to put behind my cats but before I do, I figured I would consult the NICO Gods first haha.

Few questions to start.
<1> Will it improve MY torque since my car relies on pressure every where?
<2> What kind of negative effects can it have on the Q?
<3> If I were to take on the task of making one... is there a way to make it air tight in one direction until it opens if I use a THB?
<4> Could I get away with using a similar system to a window switch to control how "open" it is?
<5> Has anyone ever used a cutout on a Q to date?


These are just a few of the many questions i have... I think that if I build this for real, I'll need to spend some time on the R&D of it before I jump in headfirst. My biggest fear is that I will have an exhaust leak around the valve if I make it... or that once open it will do damage to my motor OR lose back pressure and it become counter productive other than a beastly sound.... Suggestions, tips, advice... please let it start flowing!!!! Thanks!!


Andy

[HooverSA]

Anyone? lol please?

[Skibane]

I got to looking at it and i swear to you that i looked like a throttle body with a headlight motor to move it.

Aluminum throttle body ain't gonna last long in those temperatures - and neither is a headlight motor.

In the truck industry, plenty of manufacturers make exhaust brakes - which look a lot like an exhaust cut-out. They use cast iron for the housing. The actuator is usually an air cylinder, because an electric solenoid won't survive the kind of temperatures it would see.

[HooverSA]

now what is the catch? price lol i know most run between 150-250 per side... also is this vacuum driven or just a small air tank?

[qship96]

What exactly, are you trying to accomplish by doing this?

[Skibane]

now what is the catch? price lol i know most run between 150-250 per side... also is this vacuum driven or just a small air tank?

Paying $1K plus isn't unheard of. Solid, reliable hardware ain't cheap!

Most diesel trucks already have an onboard air supply, so the cylinder is usually air-driven.

Another consideration: How ya gonna mount your cutouts? Where on the vehicle is there enough room to squeeze them in?

[HooverSA]

well when i was working on my car a long time ago, i noticed my oem cats were bad (made it over heat they were so stopped up) so i cut them off and drove a mile to the shop and had some put on that are magnaflow high-flow. they are about 1/4 the length of the oem cats. then i had my two resonators removed and left the suitcase muffler on the back. When i heard it open header, it was really really awesome although i had no back pressure. Now since i have the two heat sheilds under my car where the cats used to be and have about 12 or so inches left over, I am going to mount them behind the cat so that i still get enough back pressure but i can get that mean sound i once heard. Flip a switch and tada its closed.

Here is one example of what I am going for... granted it is on a dodge, its the same principal.
http://www.youtube.com/watch?v=PeVQJ8Hw ... re=related

Also, here it is installed.
http://www.youtube.com/watch?v=TRTPPNPs ... ature=plcp

I have found MANY electric cutouts including factory installed on the ford svt raptor... I like the thought of fabricating them from start to finish but if i have to purchase them, then so be it. I just want to do something that not too many people have done here in my city, PLUS i love the way this v8 sounds... never driven a v8 prior to this car because if they have an exhaust they crackle and sound like crap but this one is a very crisp, very distinct sound. <3


so to answer you question, i want the sound of open header, with the back pressure of side pipes and the ability to go back into "Q" mode for lack of a better way of putting it... after all, it is named after a Q-Ship... gotta stick with the sleeper image some how