My exhaust dump
#1
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My exhaust dump
Long story short, lets see the pic.
http://img54.imageshack.us/img54/8014/20090207172.jpg
http://img54.imageshack.us/img54/2371/20090207173.jpg
http://img18.imageshack.us/img18/4488/20090221181.jpg
http://img19.imageshack.us/img19/7627/20090221182.jpg
I forgot to take a pic when it's all welded up and installed on the car, but it's a good fit.
btw, the dump goes back to the right side exhaust tip, it was my friend's idea and it seems to be pretty good and clean. The exhaust valve is connected to the same vacuum source as the vfad at the front, it's been tested, it will open right at 5500rpm, and close when get back down to around 5k rpm.
http://www.youtube.com/watch?v=llp2pKO_UNk
here is a video
Update pic with it on the car (don't mind the ugly welds or the spray paint.....or the slight exhaust leak, i will try to fix it later)
http://img54.imageshack.us/img54/8014/20090207172.jpg
http://img54.imageshack.us/img54/2371/20090207173.jpg
http://img18.imageshack.us/img18/4488/20090221181.jpg
http://img19.imageshack.us/img19/7627/20090221182.jpg
I forgot to take a pic when it's all welded up and installed on the car, but it's a good fit.
btw, the dump goes back to the right side exhaust tip, it was my friend's idea and it seems to be pretty good and clean. The exhaust valve is connected to the same vacuum source as the vfad at the front, it's been tested, it will open right at 5500rpm, and close when get back down to around 5k rpm.
http://www.youtube.com/watch?v=llp2pKO_UNk
here is a video
Update pic with it on the car (don't mind the ugly welds or the spray paint.....or the slight exhaust leak, i will try to fix it later)
Last edited by dmak_el; 03-03-2009 at 11:21 PM.
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i guess almost t-boning that SUV was funny...
as for the exhaust mod, that sounds like a lot of work for something that sounds like *** and improves performance very little
as for the exhaust mod, that sounds like a lot of work for something that sounds like *** and improves performance very little
#4
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that's how rotary sounds like anyway, but any opinion is well come, rather you like it or not.
I just like to try things out, at least i know i can do it, or make things rather then paying 600bux+ for an exhaust that's also dont' improve much performance....even it sounds like *** to some people...
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#6
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#7
He's as bad as Can
#11
so its nice and quiet til 5500rpm? ....I like this idea, I have sr exhaust right now, but its still restrictive.......only problem is every honda will think i have vtec or some crap, you know how they sound, quiet till 5 or 6 grand then they sound like a rattle can on roids.
you did a good write up.
also to the OP, where did you get the materials for the valve and such?
you did a good write up.
also to the OP, where did you get the materials for the valve and such?
Last edited by notorque; 02-26-2009 at 01:09 PM.
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so its nice and quiet til 5500rpm? ....I like this idea, I have sr exhaust right now, but its still restrictive.......only problem is every honda will think i have vtec or some crap, you know how they sound, quiet till 5 or 6 grand then they sound like a rattle can on roids.
you did a good write up.
also to the OP, where did you get the materials for the valve and such?
you did a good write up.
also to the OP, where did you get the materials for the valve and such?
all the materials i got from work. The valve was from a bmw 335 muffler. The piping size is 2.25" and there is no point going any bigger in my case, since the valve is about 2 to 2.25".
Last edited by dmak_el; 02-26-2009 at 09:22 PM.
#15
i got a 08 328 in the driveway.......hmmmmm...
*grabs sawzall*
but for real, what year 335, maybe I can grab one from a junk yard. I think this would respond nicely when the nitrous is going
*grabs sawzall*
but for real, what year 335, maybe I can grab one from a junk yard. I think this would respond nicely when the nitrous is going
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I just put a switch between the vacuum solenoid and the pcm, since the pcm controls the ground to the solenoid. pcm will ground the solenoid after 5500rpm. By having that switch, i can keep the vfad and the exhaust dump close for street/normal driving. Once i close the switch, the vfad and dump will open at 5500rpm by the pcm. There are no fault memory in pcm with that switch i installed.
So the 335's come with butterfly valve on the muffler? Is it for the same reason you did this?
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Well, i just happen to have one of those valve, so i just want to see if i can make it work. and it seems to be working well. Only problem i m having is, since it's winter and have lot of snow here. I found sometimes after i park it outside for a while, when i start the car again the dump valve would be froze most likely due to all the snow melted on it from the last drive, but after about 2~3mins, once the exhaust heat up a bit, the valve works normal again. not really that big of a deal for me, but maybe i will make some kind of shield for it.....when i have time.
Last edited by dmak_el; 02-28-2009 at 05:24 PM.
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what kind of diy do you guys want? coz it's mostly welding and cutting. i will try to get some more pic next time i have the car up in the air
and then just run a long vacuum hose from the front to the valve on the exhaust.
Then to control the solenoid, when engine is running, one of the pin on the solenoid will have battery voltage(connector is only 2pins). The other wire goes from solenoid to pcm. The solenoid turns on when pcm apply ground which then turns on the vfad and in my case also my dump. All i did to keep the valve close is put a switch between the wire from the solenoid to pcm. When switch is open, the circuit is open so solenoid will not turn on.
I pick to put a switch on the ground wire, becoz it's safer since it's after the load (solenoid). So if my wiring ever broke, or shorted to ground, it's not going to burn the car down, just the solenoid wouldn't work right. since i have to run the wires from engine bay into the inside of the car.
I thought about putting relay in there, have 3 different switch positions, one position is just keep the valve always close at all time, one is let it function by the pcm(open after 5500rpm), one is just open all the time. But then it will be lot of wiring, and i wouldnt' get into it.
The easiest way to have the exhaust valve open all the time, is just unplug the vacuum hose. becoz vacuum keeps the valve close, without the vacuum, valve wont' close.
and then just run a long vacuum hose from the front to the valve on the exhaust.
Then to control the solenoid, when engine is running, one of the pin on the solenoid will have battery voltage(connector is only 2pins). The other wire goes from solenoid to pcm. The solenoid turns on when pcm apply ground which then turns on the vfad and in my case also my dump. All i did to keep the valve close is put a switch between the wire from the solenoid to pcm. When switch is open, the circuit is open so solenoid will not turn on.
I pick to put a switch on the ground wire, becoz it's safer since it's after the load (solenoid). So if my wiring ever broke, or shorted to ground, it's not going to burn the car down, just the solenoid wouldn't work right. since i have to run the wires from engine bay into the inside of the car.
I thought about putting relay in there, have 3 different switch positions, one position is just keep the valve always close at all time, one is let it function by the pcm(open after 5500rpm), one is just open all the time. But then it will be lot of wiring, and i wouldnt' get into it.
The easiest way to have the exhaust valve open all the time, is just unplug the vacuum hose. becoz vacuum keeps the valve close, without the vacuum, valve wont' close.
Last edited by dmak_el; 02-28-2009 at 05:16 PM.
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