internal to external wastegate
 

ok so i must be misunderstanding how you change an internal wastegate to an external wastegate. I have a 5 bolt exhaust with a flapper for an internal wasteagate, i also just put on an external wastegate cause i wanted to get rid of the internal one. i took the internal wastegate off so i am just left with the little flapper thing and a extra spring to hold the wastegate flapper shut. well i didnt mess around with it for a while until i noticed that i wasnt getting boost until like 4500-5k, when i used to start getting boost at 2500rpms. so what i did was take off the spring that was holding the internal wastegate flapper and chained it up so it was basically fully shut. well i took it for a test run and now i am not getting any boost, well maybe 2psi but at 7000rpms!!! i thought that when you changed from an internal wastegate to an external, that you had to weld that little flapper shut. and i basically did that but now i am not getting any boost??? wtf is goin on?

i have some pictures but the camera blows and they are kinda blurry.
they are just showing that i chained it up to the manifold brace

Attachment 26328

Attachment 26329

Re: internal to external wastegate
 

You understand correctly, but you are just ------- something up.

Do it the right way and get a block off plate.

Re: internal to external wastegate
 

how could i be ------- something up??? why is the spring working better than when I block it off?

Re: internal to external wastegate
 

sounds right.
only issues would be vacuum line to ext. wg or arm for flapper being held the wrong way. but that's so simple it's a given.
or. the diaphragm in the ext. wg it torn.
just get 5bolt flange w/blockoff.
good luck

Re: internal to external wastegate
 

i have the side wastegate nipple routing to the Mboost controller. and the top nipple is bleeding into the atmosphere.

Re: internal to external wastegate
 

I would rule out the mbc first.
you have the black plastic mbc?

Re: internal to external wastegate
 

im betting youre just not holding it all the way shut....weld it

Re: internal to external wastegate
 

ya but the spring didnt hold it tight all the way either and i got like 10psi more with the spring and no wastegate actuator arm. i am ------- lost!!! :S

Re: internal to external wastegate
 

because the spring actually had pressure up against it...im betting that chain setup you rigged on there is leaving a gap. Just weld it or find some other way to securely shut it, or get a blockoff flange.

Re: internal to external wastegate
 

stop being a ----- and weld it shut!!! you obviously are not getting a tight enough seal so just weld it up and be done

Re: internal to external wastegate
 

stop being a -----? :l you have a tig welder just laying around that i could use to weld CAST IRON didnt think so...... ::)

Re: internal to external wastegate
 

you dont need a tig, especially just to lay a quick bead to hold the actuator shut

Re: internal to external wastegate
 

a tig?? what country are you from.. everyone in the US know you dont need a tig to weld your actuator shut just a shitty sears mig welder will suffice.. oh and yes i do have a tig lying around ;D

Re: internal to external wastegate
 

Bitch nog, I had no problem welding my downpipe to a cast exhaust housing. Take your grannie panties off and get the ---- done. -----

http://img25.echo.cx/img25/5954/dp18kw.jpg

Re: internal to external wastegate
 

the big question is, is that unit still being used as it was in the picture?

Re: internal to external wastegate
 

are you shitting me jackoff? those are the shittiest welds in the world, those are the ugliest bird ---- welds i have seen to date!!! hahaha :l :S :X

Re: internal to external wastegate
 

You moron, those are professional tig welded. Get it right fool.