switching to external wastegate...

[R3B]

Hey, I was wondering if this was a good idea. I heard they are easier to maintain and that the hold a good power increase when dumped to atmosphere. I understand how they work but i was wondering how i could add one to the stock turbo ? i figure you have to reroute a line? I was considering the PG garage manifold flanged for 38 to 44mm wastegate. also what size would be the most productive? anyone else have this done?

current mods are.. fujita CAI, pg inlet, corksport dp and tp and turbosmart hybrid bpv

 

[junya1985]

You'd have to get the inside of your turbo welded shut or switch turbos and you have to get a dump tube 38mm would be fine

 

[R3B]

o i would actually have to get it welded. is it worth it?

 

[creedns]

Don't external gate a bad k04. Only need to worry about boost creep steppin up to bigger turbos man

 

[bykeryder4life]

dude do some reading about wastegates and the difference from internal to external. yes you gotta weld it in, and weld the flapper shut on your turbo's stock WG(internal type). You will have to route a few vac lines too. the actual external WG isnt going to get you any power gain, it just has the capability to hold/control boost much better than the stock internal WG. the power comes from being able to properly tune the car and take advantage of its ability to hold steady boost. and they sound badass too...

 

[socks]

dude do some reading about wastegates and the difference from internal to external. yes you gotta weld it in, and weld the flapper shut on your turbo's stock WG(internal type). You will have to route a few vac lines too. the actual external WG isnt going to get you any power gain, it just has the capability to hold/control boost much better than the stock internal WG. the power comes from being able to properly tune the car and take advantage of its ability to hold steady boost. and they sound badass too...

Thats not exactly correct.

Running an external gate vented to atmosphere can give a power increase. Why? because at full boost, all that exhaust gas that goes out the external wastegate does not have to go through the Turbo's small exhaust flange, thus allowing more efficiency for the engines exhaust gasses required to spool the turbo.

You can do so without welding the gate shut. You can remove the factory wastegate actuator, and connect the actuator arm to the actuator bracket. a few on 6 club have done so with good success. (MS6COP)

Anyways, for the k04, you wouldnt need anything more than a 38mm wastegate. I ran a 44mm (and will soon again) when i was spraying nitrous, because the internal gate of my 3071r was far too small. boost would go over 30 pounds with the internal gate set to 15!

anyways, have fun with it. its very loud. some like it, i didnt. My next external gate will be rerouted into my downpipe.

 

[bykeryder4life]

Nice info. I didnt think about the exhaust gases going out of the EWG and how that would affect the turbo's efficiency not having to pass them through the exhaust flange. that would for sure make a little power difference.

 

[socks]

that would for sure make a little power difference.

Especially when you're talking about an exhaust flange opening as small as the k04 uses.(silly)