Topic: Electric exhaust cutout (Read 30304 times)

SloS13 · « **on:** January 25, 2012, 05:36:37 PM »

Finally got around to installing this hoss. Sorry no pics.

VG30 drive-by-wire throttle body, 3" exhaust. I had to port the TB in order to get 3"ID piping to stick in it then used an exhaust band clamp to keep it snug. I made a harness from an old S13 engine harness. Had to modify it a bit and use some mechanics wire to keep the harness in. Basically just ran 12v to it. We'll see how she holds up.

Electric cutout

MantisX · « **Reply #1 on:** January 25, 2012, 05:47:21 PM »

That seems to work great. My question was always around how to get something like this inspected. Do they give a shit?

SloS13 · « **Reply #2 on:** January 25, 2012, 05:48:50 PM »

Quote from: MantisX on January 25, 2012, 05:47:21 PM

That seems to work great. My question was always around how to get something like this inspected. Do they give a shit?

I live in SC. You could drive a hollowed out log with 4 wheels if you want.

ratcityrex · « **Reply #3 on:** January 25, 2012, 07:18:14 PM »

Nice, do you have a write up on how to build it with all the parts needed?

PhilStubbs · « **Reply #4 on:** January 25, 2012, 08:09:22 PM »

why didnt you make a flange, weld the flange on to the exhaust and bolt it on?

sounds like it reacts pretty quick. it would be sweet to have a full throttle switch along with dash mounted switch.

SloS13 · « **Reply #5 on:** January 25, 2012, 08:56:46 PM »

Quote from: ratcityrex on January 25, 2012, 07:18:14 PM

Nice, do you have a write up on how to build it with all the parts needed?

I sure don't. It's pretty simple. The part is a VG30 DBW throttle body. (I lucked out and got one for $20 shipped from egay. They come on Altimas and Maximas and some infiniti shit. Took 12v from radio and put it on a switch.

It's this part:
http://www.ebay.com/itm/Maxima-Altima-I35-Murano-350Z-G35-Fuel-Injection-Throttle-Body-3-5L-/180800127325?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AAltima&vxp=mtr&hash=item2a1887015d#ht_2424wt_1037

Looking at the throttle body, the pins needed are the two at the right. Straight 12v

Quote from: SecksyPeePee on January 25, 2012, 08:09:22 PM

why didnt you make a flange, weld the flange on to the exhaust and bolt it on?

sounds like it reacts pretty quick. it would be sweet to have a full throttle switch along with dash mounted switch.

It's almost instantaneous. I bought a T4 4-bolt downpipe flange which I could have technically adapted (would have been a PITA) but I don't have the greatest tools so I went the "shove it in there" route.

ratcityrex · « **Reply #6 on:** January 25, 2012, 09:55:39 PM »

Sweet!

HiProfile · « **Reply #7 on:** January 25, 2012, 11:44:39 PM »

Looks like a winner. I've never liked motor-on-cutout designs because it sees all that heat, dirt, and speed bumps. Just beware the bearings on the shaft, most bearings degrade at the temps exhaust gets to, even near the rear of the car.

Random Hero · « **Reply #8 on:** January 27, 2012, 02:11:17 AM »

I have 30 or so GM 8.1 fly by wire throttle bodies volvo penta recalled due to a "chance" they could get stuck WOT because of water intrusion during assembly. 30 bucks each! +s/h if anyone wants them.

92CXyD · « **Reply #9 on:** January 27, 2012, 08:41:13 AM »

Quote from: Random Hero on January 27, 2012, 02:11:17 AM

I have 30 or so GM 8.1 fly by wire throttle bodies volvo penta recalled due to a "chance" they could get stuck WOT because of water intrusion during assembly. 30 bucks each! +s/h if anyone wants them.

What size are those?

Random Hero · « **Reply #10 on:** January 27, 2012, 09:21:03 AM »

quick google search will tell you, but either way they are bigger then you need.

All GM V8 fly by wire throttle bodies are the same.

92CXyD · « **Reply #11 on:** January 27, 2012, 09:59:30 AM »

Quote from: Random Hero on January 27, 2012, 09:21:03 AM

quick google search will tell you, but either way they are bigger then you need.

All GM V8 fly by wire throttle bodies are the same.

75mm sound right?

Random Hero · « **Reply #12 on:** January 27, 2012, 11:30:55 AM »

its between 65 and 75. dunno where, dont care.

PhilStubbs · « **Reply #13 on:** January 27, 2012, 12:12:34 PM »

Damn that's tempting. If I had a street driven turbo car I would be all over it. I just have a drag car.

HiProfile · « **Reply #14 on:** January 27, 2012, 08:35:02 PM »

Quote from: Random Hero on January 27, 2012, 09:21:03 AM

All GM V8 fly by wire throttle bodies are the same.

I have a question for both you and SloS13: do your throttle bodies seal with zero power, or are they cracked open a hair?

I think the GM tb is, but not sure about the Nissan.

SloS13 · « **Reply #15 on:** January 27, 2012, 08:39:51 PM »

Quote from: HiProfile on January 27, 2012, 08:35:02 PM

Quote from: Random Hero on January 27, 2012, 09:21:03 AM
All GM V8 fly by wire throttle bodies are the same.

I have a question for both you and SloS13: do your throttle bodies seal with zero power, or are they cracked open a hair?

I think the GM tb is, but not sure about the Nissan.

From the factory it's cracked open but there's a loctited adjustment. After adjusting it, it's sealed with 0 power.

HiProfile · « **Reply #16 on:** January 27, 2012, 08:58:26 PM »

Interesting. I might get a QR25 tb for my teg when I get the SC on. From what I've found the QR has a 2.35" plate, and the VQ has a 2.85" plate. I think even 2.35" and a stock-ish muffler would add up to be enough for a 3" exhaust. A 16ga 3" pipe is about 2.88" ID.

One more question, what's the overall size?

Random Hero - if you could let me know the length and width of your TB's and if they can be adjusted to seal, I might be interested in 2.

SloS13 · « **Reply #17 on:** January 27, 2012, 10:08:17 PM »

Quote from: HiProfile on January 27, 2012, 08:58:26 PM

One more question, what's the overall size?

8 inches erect. I'll have to remember to take some measurements tomorrow.

Random Hero · « **Reply #18 on:** January 28, 2012, 11:17:08 AM »

I'm not interested in measuring them, if you want you can go somewhere and measure them.

SloS13 · « **Reply #19 on:** January 28, 2012, 12:20:42 PM »

ratcityrex · « **Reply #20 on:** January 28, 2012, 12:38:42 PM »

Fuck yeah, looks good!

HiProfile · « **Reply #21 on:** January 29, 2012, 12:41:24 PM »

Quote from: Random Hero on January 28, 2012, 11:17:08 AM

I'm not interested in measuring them, if you want you can go somewhere and measure them.

It would take you 15 sec to eyeball the blade angle and another 15 to get a rough measure. My extra searching only found the earlier TB's have fragile gears, so I'm not going to risk it. Besides there's two on ebay atm for $18 and $20.

SloS13, thanks. Random Hero, no thanks.

Random Hero · « **Reply #22 on:** January 31, 2012, 01:32:59 AM »

Perfect! Go fuck yourself

SloS13 · « **Reply #23 on:** February 01, 2012, 12:42:48 PM »

Motor shit the bed already

HiProfile · « **Reply #24 on:** February 01, 2012, 01:34:27 PM »

The car's motor or the cutout's motor?

ratcityrex · « **Reply #25 on:** February 01, 2012, 01:43:07 PM »

Quote from: HiProfile on February 01, 2012, 01:34:27 PM

The car's motor or the cutout's motor?

SloS13 · « **Reply #26 on:** February 01, 2012, 03:14:57 PM »

Quote from: HiProfile on February 01, 2012, 01:34:27 PM

The car's motor or the cutout's motor?

oh sorry, the cutout's motor. Car's motor is fine. Just upped the boost yesterday. its nice.

ratcityrex · « **Reply #27 on:** February 01, 2012, 03:18:53 PM »

shitty $:-\$

SloS13 · « **Reply #28 on:** February 01, 2012, 04:34:52 PM »

got a TB from an old Explorer coming, I'll either hook it up to a cable or do some vacuum shit or something

92CXyD · « **Reply #29 on:** February 01, 2012, 06:54:35 PM »

Quote from: SloS13 on February 01, 2012, 04:34:52 PM

got a TB from an old Explorer coming, I'll either hook it up to a cable or do some vacuum shit or something

Looking at getting at a TB from a Caddy Northstar motor that is just junk laying around my buddy's shop.

Try it with a waste gate actuator I have laying around.

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Author Topic: Electric exhaust cutout (Read 30304 times)