have a turbo ls wondering to run open dumptube or not, more power, sounds cool but really loud. How many of you run dumptubes?

 

many people do some dont. i do

 

ive always ran open dump tube, its not loud in my opinion, but than again i have a loud exhaust so i never even hear it open up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devine &raquo;</TD></TR><TR><TD CLASS="quote">ive always ran open dump tube, its not loud in my opinion, but than again i have a loud exhaust so i never even hear it open up.</TD></TR></TABLE>
damn your exhaust must be loud!

Open dump is the only way to go imo

 

i hate open dump , its loud and it stinks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">
damn your exhaust must be loud!

Open dump is the only way to go imo </TD></TR></TABLE>

yeah it is loud, its a 3 inch cat back from kteller but my flex pipe broke in my downpipe so its pretty loud, not nearly as loud as open downpipe but atleast i can carry on a conversation and drive at the same time, if i go wot thats another story haha

 

haha damn. I really want the kteller 3 inch

 

I'm running an open dumptube....

It really does stink though... but my car stinks anyways because of the test pipe... that and I'm running pretty rich...

The only reason I'm open right now is because it was going to be to much of a pain to route the dumptube back into the exhaust, I just didn't feel like doing it at the time... I still don't care, it doesn't bother me enought to take the time to route it back into the down pipe...

 

yea mine stinks like a bitch, but only when i'm WOT.

 

Yea I run open too...mine doesn't stink though so I'm not sure about that one.

 

Yep i do.......I love it......And the turbo loves it too. I spool like 500 rpms faster.

 

i dump it out, the guy that I'm making manifold/downpipe also wants an open dumptube.

 

I had one and really didn't mind it, except it did make a shitload of noise. Smell wasn't an issue. The real problem I stumbled upon was the inability to hear detonation at WOT. You really have to have a trained ear to hear it over an open dump. Also, part throttle driving became really annoying, so I re-routed it. I like the new, refined sound.

Matt

 

what's the difference if your not running a cat. . . .

Which most people just run test pipes. . .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jason190 &raquo;</TD></TR><TR><TD CLASS="quote">Yep i do.......I love it......And the turbo loves it too. I spool like 500 rpms faster. </TD></TR></TABLE>

i cant understand how that is physically possible?? care to elaborate??

 

my dp..is bolted directly to the exhaust and my car doesnt smell, and i have an open dump staright to the ground.

why do people say having a test pipe/ or running with out a cat, makes your car smells ???

isnt everything bolted up nice and tight? must be an exhaust leak you guys dont know about or dont care to fix, and you just blame it on having a testpie/no cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Johnyquest &raquo;</TD></TR><TR><TD CLASS="quote">I had one and really didn't mind it, except it did make a shitload of noise. Smell wasn't an issue. The real problem I stumbled upon was the inability to hear detonation at WOT. You really have to have a trained ear to hear it over an open dump. Also, part throttle driving became really annoying, so I re-routed it. I like the new, refined sound.

Matt</TD></TR></TABLE>
why is part throttle driving annoying?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">
why is part throttle driving annoying?</TD></TR></TABLE>

Maybe his wg is messed up and it also dumps in vaccum?
This remind me of some smart guy who said you will smell the exhaust from the dumptube at redlight stops

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LostCRX &raquo;</TD></TR><TR><TD CLASS="quote">

Maybe his wg is messed up and it also dumps in vaccum?
This remind me of some smart guy who said you will smell the exhaust from the dumptube at redlight stops </TD></TR></TABLE>

Or he has an SSAC gate. . .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Johnyquest &raquo;</TD></TR><TR><TD CLASS="quote">The real problem I stumbled upon was the inability to hear detonation at WOT. You really have to have a trained ear to hear it over an open dump. </TD></TR></TABLE>

Ummm... I don't think I've ever heard detonation but my understanding is that if you hear it your engine is pretty much a done deal...

Do you detonate often? You are talking about pre-ignition right? Where the fuel ignites before the spark plug fires?

Maybe I'm confused

 

I do and I love it... Cant hear it over the open DP either

 

I only dump into the atmosphere when I can't find a toilet.


ha ha I am funny.

anyway, I ran open downpipe and could still hear the internal wastegate open up (but only when there was a barrier next to me). it was very rewarding. couldn't hear my bov though. it was a dsm, and mounted on the charge piping in the bumper, pre-ic.

I should post pictures of my set up some day. it's worth a laugh.

 

Id like to know more about this subject

I was under the impression it had absolutely no effect on performance

Does it?

Or is everyone just lazy to make it go back into the exhaust or have its own exit?

 

Open dumptube compared to dumptube routed into downpipe was a 40whp difference on an H22A turbo, tests done by FMAX back like 5 years ago. Turbonetics now sells F Max turbo kits badged as their own

 

Im assuming open downtube was the lesser of the 40whp? I just dont see how it makes a difference