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Old 04-11-2008, 06:48 PM   #1
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Default Poor man's exhaust cut-out

I've been wanting to do this for years and never in my imagination did I dream it could be executed so beautifully. It almost looks like the car was supposed to come that way.

Super sleeper hidden secret lever behindish the seat


Cleaned up for that OEM look.


Up in the air


Here's the rest of my exhaust BTW.


Feast your eyes upon the glory.






you cant see if unless you're under the car...I think and it actually works perfect. Im still gonna clean up the welds and stuff and attach the throttle body on there a bit better but otherwise it's done.

The muffler is super restrictive b/c I wanted it to sound close to stock. This'll help a lot.

Other pics:
I SO need to clean the garage. It's a sad sight


ugh, tire time


I need to refinish my wheels. I usually dont care so much about nice looking wheels but the powdercoating is pitted all to hell making them get dirty real fast and a serious pain to clean. So far I've done one wheel

Before


After


And heres the lexus. It's dirty. I'll get around to it. So far I've claybarred about 12sqft.
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Old 04-11-2008, 07:17 PM   #2
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are you able to reach that while driving? it looks like you would have to get out of the car to get to it...........GHETTO-TASTIC!
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Old 04-11-2008, 07:17 PM   #3
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Me likes, that's awesome. We need video's!
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Old 04-11-2008, 07:25 PM   #4
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A thottle body? That is priceless! SloS13 wins the Ghetto Fabulous award.

If that thing is open for any length of time, you might consider trying to fabricate some kind of downpipe for it. One of the guys in LA melted his bumper cover a few years ago doing something similar.
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Old 04-11-2008, 07:28 PM   #5
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your hood is broken.
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Old 04-11-2008, 07:37 PM   #6
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What size Throttle body? What did it come off of? I keep thinking about doing something similar, but have it hooked to the gas pedal so it only open above 3/4 throttle or something. Same here, going for 100% sleeper OEM look, and sound.
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Old 04-11-2008, 07:39 PM   #7
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wow that's resourcefulness. i would guess ideally you'd want to put it further up in the exhaust stream
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Old 04-11-2008, 07:41 PM   #8
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weld a spare wastegate on it and run a boost source into it instead of the cable.
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Old 04-11-2008, 07:58 PM   #9
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Quote:
Originally Posted by Braineack View Post
weld a spare wastegate on it and run a boost source into it instead of the cable.
Si. Then I could add MBC to adjust it. Might do that. Do they make wastegates that open at like 2PSI or something? Don't answer that, I'll look it up.
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Old 04-11-2008, 08:12 PM   #10
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Old 04-11-2008, 09:05 PM   #11
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thats awesome!
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Old 04-11-2008, 09:29 PM   #12
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went for a ride just now and it works absolutely perfect. no leaks and it sounds great open. It's still going through the resonator so it's not crazy loud. Actually sounds really good. I'll try and get a vid soon. Oh yeah and I can reach it without a problem. It's just slightly awkward.

I considered putting a wastegate actuator on there but I decided I'd rather just have a manual one.

It's some kind of Honda Civic throttle body. Either a D or B series. I removed the lip and it fit perfect in a 2.5" (with expanded end). Fit perfect.
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Old 04-11-2008, 09:46 PM   #13
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Cool. Turn up the amps on your welder, looks way too cold. I so wanna do this.
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Old 04-11-2008, 10:29 PM   #14
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Quote:
Originally Posted by patsmx5 View Post
Cool. Turn up the amps on your welder, looks way too cold. I so wanna do this.
Well I had to use my shitty *** flux core. Low was too low and hot was too hot but I'd rather have bird **** welds than holes everywhere

I've been too lazy to get my gas filled for the MIG.
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Old 04-11-2008, 10:38 PM   #15
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Meh, I've done plenty of flux core welding. It works. Just gotta get the heat right. I'm no great welder but when the power's too low, you have to use more gap to get the heat to concentrate.

So what's the specs on your exhaust? I'm assuming 2.5". What muffler? You gotta go make some videos.
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Old 04-12-2008, 12:40 AM   #16
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all homemade 2.5. Summit resonator and summit "turbo" muffler. Sounds real quiet. Only thing I can take videos with is my digicam :(
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Old 04-12-2008, 12:57 AM   #17
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Here's something similar on a turbo SE-R.
http://www.sr20forum.com/turbo/18425...-out-done.html

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Quote:
ATP had a neato exhaust cut out that worked off boost pressure to open it up and close it at no boost. Of course I wasn't willing to pay around $300 for this - and they are out of stock with no in-stock date known, I made my own.

You need two things to make this work - first you will need some kind of precision made butterfly device in a housing. A throttle body off a 4.6 Ford Crown Vic was big enough (2 3/4) opening and cheap - $9.99.
Second you need a turbo wastegate actuator. Brand new Dodge SRT take-off for $40 will work just fine.

So, concept is simple - it will open up based on the wastegate you choose to use (SRT is 4 psi) and of course is closed with the same tension when driving normally. Add in a bit of creative fab/cut/weld and you my friend have a effective cutout which requires no electrical wiring, no cables and no reaching under the car to open and close. Yes, you will have to route boosted air there, but 1/4 soft copper line is cheap, easy to bend and very durable.

Does it work? Damn skippy it works - and works freaking awesome! I hesitated to post this, as it has only been on the car for a couple days and I cannot prove its long term reliability.

Just thought I would give those looking for a very stealth exhaust for normal driving and a wide-open in-your-face screaming no back pressure LOW DOUGH option.
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Old 04-12-2008, 10:46 PM   #18
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awesome, sign up on homemadeturbo.com and post that now!!!!!
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Old 04-13-2008, 12:28 PM   #19
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Quote:
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awesome, sign up on homemadeturbo.com and post that now!!!!!
I've been on hmt since forever. I posted it in the fab section.
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Old 04-13-2008, 12:56 PM   #20
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unfortunately ATP hasnt had those VES valves in stock for at least 2 years... why they still advertise them on their site is beyond me.

another solution is a QTP electric cutout. if you get the controller with it you can trigger it open manually or with a button/switch. So you could have it trigger only when your WOT, etc.

http://www.quicktimeperformance.com/QTEC/index.php
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