What's the pro's and con's other than the sound it makes? I was thinking about making my W/G open but I'm not really sure if I should or not. Thanks
Recirculated WasteGate vs Open WasteGate?
- Thread starter Boosted Supra
- Start date
7mgte1988;1375742 said:
he means when the wastegate dump tube goes straight to the atmosphere or when its recirculated back into the downpipe farther down.
Hey Manny,
Where does yours recirce back in? I know that if it does not join very gradually/at a shallow angle it can cause turbulance and excess back pressure hurting spool. It is best to recirce it into the bend at the bottom of the DP so you can have the gasses flowing right with flow as they enter. Obviously there is a drastic difference in noise as I am sure you already know!
So what are you doing? 3.5" or 4" DP? New wastegate with good spring finally? lol
HTH,
Seth
Where does yours recirce back in? I know that if it does not join very gradually/at a shallow angle it can cause turbulance and excess back pressure hurting spool. It is best to recirce it into the bend at the bottom of the DP so you can have the gasses flowing right with flow as they enter. Obviously there is a drastic difference in noise as I am sure you already know!
So what are you doing? 3.5" or 4" DP? New wastegate with good spring finally? lol
HTH,
Seth
I've always been under the impression that a properly made open dump will always be a bit stronger than directing it into the exhaust. It just kind of makes logical sense when thinking about the exhaust.
Make sure you are dumping it away from things that dont like fire.
Make sure you are dumping it away from things that dont like fire.
LOL Seth. My w/g is actually connected like this
I'm sticking with the same setup, no looking to spend extra $$$ when what I have is good and plenty, lol.
I'm sticking with the same setup, no looking to spend extra $$$ when what I have is good and plenty, lol.
Last edited:
Backpressure doesn't exist (you DON'T want figgie to bitchslap you).
As the WG is there to LIMIT power, it really doesn't matter too much on how it enters the rest of the exhaust.
After owning a DDP for a number of years, I have grown to hate it most of the time, but love it some of the time. It will be changed eventually...
As the WG is there to LIMIT power, it really doesn't matter too much on how it enters the rest of the exhaust.
After owning a DDP for a number of years, I have grown to hate it most of the time, but love it some of the time. It will be changed eventually...
Poodles;1376029 said:
Backpressure DOES exist, you just don't want it on turbocharged engine, as the pressure differential goes down, so does turbo response.
hey manny wats up well you heard my open wastegate at the ne2k9 meet.... and if you dont mind the noise then i would go for it in my opinion...
pros: more power, you can scare people lol.
cons: noise smell but not really if you route the dump tube in the right direction
pros: more power, you can scare people lol.
cons: noise smell but not really if you route the dump tube in the right direction
No, backpressure does not exist 
Don't make me page figgie...
Personally I'd rather go rerouted with a cutout if I want the noise, but I don't forsee myself doing that.
Don't make me page figgie...Personally I'd rather go rerouted with a cutout if I want the noise, but I don't forsee myself doing that.
Poodles;1376266 said:No, backpressure does not exist
Personally I'd rather go rerouted with a cutout if I want the noise, but I don't forsee myself doing that.
http://en.wikipedia.org/wiki/Back_pressure
It does. We just don't want it
Thats why people run open WG(Even though it sounds like a jet when the WG opens). And run 3",4" exhaust and beyond for high hp turbo engines.
:: facepalm :: wikipedia is NOT a good way to back up your argument.
and as poodles says, it's not backpressure, its exhaust flow. when people say something increases backpressure, what it ACTUALLY means is a restriction in flow.
if you still don't believe me, go take a mechanical engineering course.
"backpressure" is to fluid dynamics as "centrifical/centrifugal force" is to physics.
and as poodles says, it's not backpressure, its exhaust flow. when people say something increases backpressure, what it ACTUALLY means is a restriction in flow.
if you still don't believe me, go take a mechanical engineering course.
"backpressure" is to fluid dynamics as "centrifical/centrifugal force" is to physics.
Hey Manny,
Yea you might find minimal gain in figuring out a way to get the angle of entry not so sharp as it is 90 degrees now and can cause turbulance in the flow.
As for the back pressure issue why does a 4" DP help spool? Less back pressure on the turbine blade so in theory if the WG is causing turbulance which causes some back pressure on the turbine it could hurt boost.
With that said seeing the numbers you are making it is not hurting you too much
Seth
Yea you might find minimal gain in figuring out a way to get the angle of entry not so sharp as it is 90 degrees now and can cause turbulance in the flow.
As for the back pressure issue why does a 4" DP help spool? Less back pressure on the turbine blade so in theory if the WG is causing turbulance which causes some back pressure on the turbine it could hurt boost.
With that said seeing the numbers you are making it is not hurting you too much
Seth
JPsToyota;1375813 said:
Only if the rest of the exhaust is restrictive.
As for "back pressure" it's just a term used to describe a restriction in flow ie: 4" dump into a 2.5" system with mufflers, where it becomes an issue is when you have ex manifold pressures = to or greater than intake pressure in a turbo motor.