Open downpipe
Thread Starter
SickSilverScooby05
Joined: Feb 2005
Posts: 746
Likes: 0
Me too if you help me i'll help you its easy? What you say
__________________
Scooby05
05 Subaru WRX!
rep for the avatar if ya like booty & Rum
Scooby0505 Subaru WRX!
rep for the avatar if ya like booty & Rum
Registered User
Joined: Aug 2005
Posts: 784
Likes: 0
my car has a cutout and when the cutout is open it has alot more torque and boost alot faster.
when my O2 sensor was after the cutout and getting bypassed it popped alot but not so much now.
when my O2 sensor was after the cutout and getting bypassed it popped alot but not so much now.
__________________
6 letters spell it, 5 lifters be ticking on it, 4 cams spinning on it, 3in cutout on it, 2 heads flowing on it, 1 turbo creeping on it, SUBARU.
Osecuroms.org Opensource Stage II 2006 wrx 281 downloads and counting
Osecuroms.org Opensource Stage II 2006 wrx 281 downloads and counting
Pm me about Subaru Tuning
OH LAWD JESUS ITS A FIRE!
Joined: Aug 2006
Posts: 13,977
Likes: 0
Mine just pops.Even with the midpipe connected and everything torqued down correctly it still pops.I need a new exhaust gasket.
__________________
"You can always count on the Americans to do the right thing - after they have tried everything else."
-Winston Churchill
"You can always count on the Americans to do the right thing - after they have tried everything else."
-Winston Churchill
Registered User
Joined: Jun 2003
Posts: 1,572
Likes: 0
Incorrect. Backpressure should be minimized as much as possible post turbo. May car trapped a consistent .5-1 mph higher running open vs. full TBE. Same exact mods on the car, comparable conditions.
OH LAWD JESUS ITS A FIRE!
Joined: Aug 2006
Posts: 13,977
Likes: 0
I always thought it should be minimized on a turbo vehicle because it would impede the flow of the exhaust gases out the hot side.
__________________
"You can always count on the Americans to do the right thing - after they have tried everything else."
-Winston Churchill
"You can always count on the Americans to do the right thing - after they have tried everything else."
-Winston Churchill
Gravel fiend
Joined: Jul 2005
Posts: 1,090
Likes: 0
Thank you schoellnasty and Matt for posting that so I don't have to rip into a n00b
Warning:
content ahead
On a turbo car, you ideally want ZERO back pressure after the turbo. The turbo itself works on the pressure differential between the inlet the outlet to operate. The turbo's resistance in the exhaust stream will provide the back pressure that the engine needs. Running an open downpipe will not increase your overall boost, but it will make the car slightly faster because it will spool up quicker. Of course, this means nothing if your ECU tune can't take advantage of it.
Warning:
content aheadOn a turbo car, you ideally want ZERO back pressure after the turbo. The turbo itself works on the pressure differential between the inlet the outlet to operate. The turbo's resistance in the exhaust stream will provide the back pressure that the engine needs. Running an open downpipe will not increase your overall boost, but it will make the car slightly faster because it will spool up quicker. Of course, this means nothing if your ECU tune can't take advantage of it.
Thread Starter
SickSilverScooby05
Joined: Feb 2005
Posts: 746
Likes: 0
So then downpipe isnt that bad. I wanna put my mid pipe on anyone wanna help I know how to but need tools thats all
__________________
Scooby05
05 Subaru WRX!
rep for the avatar if ya like booty & Rum
Scooby0505 Subaru WRX!
rep for the avatar if ya like booty & Rum
Registered User
Joined: Jul 2006
Posts: 879
Likes: 0
hey just to let you know that that DP is not a bellmouth
__________________
"Light travels faster than stupidity. This is why some people appear to be smart until they open their mouths."
"Light travels faster than stupidity. This is why some people appear to be smart until they open their mouths."
