Metal Head

TurboSmart 38mm wastegate, gt3076R turbo.
Car is not daily driven, but is street driven.

I don't really care for the open wastegate sound, but, I am looking for the MOST performance out of my car as possible.


Vent the gate or to recurculate, What is proven the best ?

I do understand that if Vented, there is no possible resrictions and no reson for boost "creep"

I do understand and know that vented wastegate is annoying (Opinion,others may be different)

I do undertsand that if dont properly the gate Can be recurcilated, I assume you want NOT to create turbulance.



Reply away.

yakuza

You are right of it being noisey, drivers all round me can hear it and some of them even move out of my way when they hear me coming from behind (something which I have to remember when the police are round). If you aiming high powers I would vent, I might be wrong but anyone else can correct me but recurculating will affect yout IAV tempteratures and hence peformance.

tegman23

Ive heard of people having boost control problems when its into the exhaust....I have mine vented and have no complants, I don't even hear it really.Tires spinning is alot louder lol

Metal Head

I used to have the gate recurculated and made 352 whp (Ford Zx2 )

I think this time I am going to vent, however, I do understand I do not want the gate ro dumb right into the engine bay, I dont want all that hot air in there. It will be dumped eather right out the front bumper or run along the exhaust and dump from behind the trans.

I wonder if one can put a "Muffler" on the tube, Mabey a lawn mower muffler?

MikeySpec

Vibrant has a listing for a wastegate muffler

sp00led

I have a GT3076R on a full-race ramhorn manifold. Tial V44 wastegate with a dump tube ran back past the oil pan.

I can't seem to get boost to run any lower then 13psi. When trying to setup gear dependent boost for street tires it kind of sucks not being able to make less then right under 400whp...

I can't remember who, locash or miller come to mind but they posted in a thread a while back about having a similar street car setup. When they recirculated the dump tube into the down pipe they were able to run 4psi on the 3076r solid. They couldn't when it was open vent.

Another thing that sucks. Sometimes depending on the conditions you can see exhaust coming through the floorboard or firewall. Not much but kinda sucks when you got a chick in the car...

I'd love to try it on my setup but i'm hesitant to hack up my full-race 3" downpipe.

96 GSR-T

Vibrant has been coming out with that WG muffler for a year now, I wish there was a muffler that would work, I love the sound of just turbo and exhaust.

Metal Head

as far as performance wise go, vent or not ?

ABK

more power and control vented.

Metal Head

Sound !

srmofo

its not so much the heat that is bad, its the fact that it is exhaust gas and contains little/no oxygen....if your trying avoid restriction than any muffler you put on there is not going to work....just run it past the oil pan and put a turn down on it, you would be surprised at how much quieter it is(in the car anyways,lol)

0project dc2

iTrader: (1)

i personally enjoy recirc

i hate exhust smells and loud screaming noises


my supra holds 13 psi rock steady on a 72mm twin scroll turbo

Metal Head

cool

Dartanian

Mine dumps under the oil pan. At WOT when my wastegate is opening up, sound is the last thing on my mind. Honestly, vtec engaging is louder than my wastegate opening up.

Joseph Davis

Recirculate the dump towards the end of the downpipe, have it come in at a shallow angle. It's always worked for me, and besides there isn't any power "lost" by recirculating, you merely lose some lower pressure ratio efficiency. As boost comes up and the bulk of the exhaust passes through the turbine instead of across the wastegatem the system efficiency comes back in line with an external dump system. Recirc vs non-recirc is merely a noise vs correctly designed for boost control argument.


Kind sir, have you heard of motorcycles?

robbieshonda

Ive ran recirced and VTA on multiple cars and never ran into any issues as long as it was far enough from turbo to avoid turbulance 6 inches+.
I like mine Recirced alot quieter the car is loud enough on its own

LastGenEK

Hahaha that is the truth!!!

I like it open dump!

Joseph Davis

I've always heard 18 inches, but never got adventurous and experimented nor have I had any issues with them even if under that number. I've only done it to four cars, and tuned a handful (six?) more that were brought to me with a recirculated dump. One of them was right at or under 6" from the turbine, but he had a ~13 psi spring and everything worked out the way it should.

Not anything definitive, wish I'd been through more of the setups to know better.