So Im about to install the wastegate, just a 38mm, and I was wondering what I should do, just dump the wastegate into the atmosphere(straight down via a pipe) Or Re circulate it back into the exaust after the turbo?
What are the advantages and dissadvantages of each?
Thanks for all the help!
how much boost are you going to be running?
I've ridden in boosted cars with WG's dumped to atmosphere, and it sounded awesome.
The only problem is, if you're only running say 6lbs of boost, its going to be open a LOT more often then if you were running 13lbs, for example.
daily driving, can you stay away from 6lbs of boost? I know I can, but cops beside you may not like it if you happen to not notice them.
edit:
yeah its also very loud, and would get annoying if you're driving it all the time.
Edited 1 time(s). Last edited Sunday, August 13, 2006 3:31 PM
if you drive this thing daily do not just have it dump .... tie it back into the exhaust... it sounds like crap! if you dont.. i was stuck with an open dump for 2 days and i have never walked to so many places... i couldnt STAND to drive my car... and if i did i went VERY light on the gas so it wouldnt spool and open up
The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno
Its not my daily driver, although id like to be able to take it out on the weekends and not have to worry about a noise violation, I was thinking, what if I ran it thorugh a small motorcycle muffler? Just an idea, but it would alow it to flow pretty good, quiet it down plenty. if that sucks then Ill just run it back in the exaust, the exaust is only a 2.5" downpipe back to the firewall then flanges to 3.5" straight back to the axle and has a turn down. No cat, no resonator.
And yes it will be set for 6PSI
its going to be stupid loud already, so whats more racket, right?
especially with just a turn down and nothing else.
I've got 2.5" DP to the firewall, and 3" all the way back with a magnaflow muffler. Its still too loud for daily driving.
if you're set for 6psi... route it back through the exhaust
remember though, the less bends in your dump tube the better.
I am going to be running 16 psi tuned. I had ran for 10 psi for a long time. I had it routed into the exhaust, its good because you never really hear it. But I am going open dump now for the new setup...
its personal prefference really
LE61T PTE6262 Powered 
I have my wastegate opening straight into the atmosphere.......Loud?.....Yes.....but it sounds insane....you hear the turbo spool and then the gate open....i love it...i dont think i would ever want to route it into my exhaust but, thats just me...
i have a pipe routing straight to the ground
actually i believe i heard, (only heard because i've never read the book) but in Maximun Boost, there is something about the dump tube being 18in long with a slash cut into the exhuast, will yeild the most gains...
note that this is just hearsay, and i don't know exactly what it said, and no i don't believe it exactly because it's probably one of those things that need to be tuned, like an intake or exhaust mani runner length to see any gains from it
I miss my open dump.....
Its awsome to see the look on the driver's face, in the car next to you, when the dump opens.......
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
I am running 2.5 full turbo back magnaflow resonator and exhuast.... wastegate open to atmosphere.....
my car is very very quite when im cruising around... not as quite as stock, but its a real low tune.... but... when i floor it.... i scare the $417 out of people...
i cant want anything else....
|Forged 8.9:1 Wiseco Pistons|Forged Eagle Rods|HPTuners|60trim|Tial Wastegate|
|Precision Intercooler|2.5" Exhaust|2.5" Charge Pipes|630CC Mototron Injectors|
|Stock: Fuel Pump, Transmission, Manifold, TB, Head, Head Gasket, Ignition, Suspension...|
Well I think Ill just run it with a atmospheric dump for now, its gona drop down right next to the downpie so if i cant deal with it i can always dump it back in later.
Im going to pick up the pipe today to weld in the wastegate flange to the manifold.
something about exhaust tips having an angled cut on th exit actually nets you greater flow (could free up power maybe?)
theres a reason most tips are slash cut.
im only running 7psi for now and i have a tial 38mm and it is externally dumped out of a tube down toward the downpipe ,yea its loud but that is half the fun . it sounds like its one pissed off sunfire.
Open Dump = One car that sounds Pissed off........
SpyderWizard,
What size turbo are you running?
I vote for open dump
275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!
Im running a .42 compressor/.48 A/R Turbine T3
Nothing Crazy, Just what I need.
Im going to have the dump pipe for he wastegate bent tommrow and weld it on tommrow night.
To this:
Anyone by chance have some sound clips or Videos Of an Open dump??
i can try to get some for you tonight if i remember... my camera needs batteries though...
|Forged 8.9:1 Wiseco Pistons|Forged Eagle Rods|HPTuners|60trim|Tial Wastegate|
|Precision Intercooler|2.5" Exhaust|2.5" Charge Pipes|630CC Mototron Injectors|
|Stock: Fuel Pump, Transmission, Manifold, TB, Head, Head Gasket, Ignition, Suspension...|
is that wastegate going to clear your hood?!?!?!
yup, with about 4" to spare
well, I think I'll end up going that route with mine next year.
a friend of mine has a 91 Talon TSI, and when his wastegate opens up, flames shoot out from underneath the car. it's pretty awesome
