DMH Electric Exhaust Cutouts, interesting! Options

[hellsyphon]

My friend just sent me this link and I think this thing is pretty interesting!

http://www.dmhperformance.com/

Heres also some clips on what it sounds like on a G35

http://www.havill.net/G35/dmh/socalted_G35sedan_DMH1.AVI
http://www.havill.net/G35/dmh/socalted_G35sedan_DMH2.AVI

[playr158]

yea i plan on using this for my turbo setup

[hellsyphon]

cool i cant wait to hear it on a celi

[97sccelica]

unless you turbocharge your celica and run the factory exhaust and cat. a cut out wont do anything but make the car annoyingly loud and kill power

[playr158]

yup thats exactly my plan that lil butterfly valve is goin to allow me to keep stock cat and exhaust but still kick a nice high psi turbo (ebc will run low boost for when its shut and high when its open)
and it will decrease spool time so i'll get better numbers since i will place it on the dp and that way the gases cmoe straight out the DP and don't have to go the full length of the car making a better spool time

[Drocay]

my boy has that on his 240 its nice, he's got sr swap and full sleeper even running stock exhuast after his 3 inch downpipe and cutout.

[Mike]

alright, that is just about the coolest thing i've ever seen, i'm buying one, i don't care too much about the performance aspect of it, i'm more intrested in the sound, that is just amazing!

[playr158]

put it on after your cat if your goin to run full stock exhaust
that way you still have enough backpressure

[Mike]

stupid question but what would happen / be the problem with very low backpressure? (ie. if i put the cutout before the cat)

[playr158]

lose power

[Hanyo]

what would be cool is have that on the intake pipe to bypass the turbo and intercooler piping so the car will not have boost lag.

Once the turbo spools.. the intake valve closes and the exhaust valve opens.

[playr158]

that probably isn't efficient
probably get more power with boost lag

[Supersprynt]

stupid question but what would happen / be the problem with very low backpressure? (ie. if i put the cutout before the cat)
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lose power
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Why the hell would you want backpressure? This is such a horrible myth it needs to stop. Backpressure is not something you want.

what would be cool is have that on the intake pipe to bypass the turbo and intercooler piping so the car will not have boost lag.

Once the turbo spools.. the intake valve closes and the exhaust valve opens.
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I dont get what your trying to say here...how do you bypass the turbo and expect any power? I think im missing something. If the exhaust is closed, your turbo cant spool, and your car will probably explode.

This post has been edited by Supersprynt: May 16, 2005 - 8:26 AM

[playr158]

on an NA motor you do actually want some back pressure other wise your powerband shifts entirely and you lose a good chunk of it...

turbo motor you don't want any

[Drocay]

heres the problem, your termanology is incorrect backpresure isn't the word to use dan. I don't know wut it is but i clearly remmeber a post back in the day by either kwanza or Spedtoe (evilspeed) explaining everything perfectly.

[Mike]

I was just looking on their website, it's too bad their systems won't fit out exhausts

is there any way to modify our exhausts to make those cutouts fit?

[Kwanza26]

You need interia to keep the engine running... not backpressure. The best exhaust is no exhaust... unfortunately the header is part of the exhaust, and that's the only part that affects intertia, and that gets all confused with backpressure.

[Hanyo]

What I mean was.. to have one of those valve right next to the throttle body with a filter connected to it.. So when there is no boost. The valve will be open and the engine will suck air through the open valve and filter.

When boost starts... the valve closes and the presurized air is allowed in to the engine.

I dont get what your trying to say here...how do you bypass the turbo and expect any power? I think im missing something. If the exhaust is closed, your turbo cant spool, and your car will probably explode.
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This post has been edited by Hanyo: May 17, 2005 - 5:45 AM

[Mike]

will their 2'' cutout fit our 5s-fe exhausts?

This post has been edited by Mike: May 17, 2005 - 1:23 PM

[playr158]

yes