adjusting wastegate

[optional187]

I'm about to install a big 16g and was reading around on the forums doing a little research. I've seen a couple people say that you need to adjust the wastegate arm before installing the turbo. Anyone have a link on how to do this? I've searched the forums aswell as vfaq and haven't found anything, any help would be helpful.

 

[ummdsmwhat]

never heard of that. show me

 

[8urv8]

You'll just want to check to make sure the wastegate isn't opening up too far or not opening enough. If it's too tight, it will boost spike like a mofo. If it's too loose, it will bleed off or creep. On my wastegate there is a threaded rod with a locknut against another piece that run's on the threads and has a hole on the end that hook's to the flapper on the turbo. Hope this make's some sense. It's kinda hard to explain. You'll want to pull the cotter pin (or whatever is holding the rod to the turbo) and remove the rod from the turbo and adjust it in or out so that the flapper is all the way closed tightly. You'll should have to use some pliers to grab it and hook it back to the turbo since you will be figthing the spring tension. Hope this help's.

 

[optional187]

http://www.dsmtuners.com/forums/new...6g-photos-probably-lots-questions-inside.html

post #10: ebay turbo - good luck. make sure you install a boost gauge; you definitely don't want to boost more than ~10psi on the stock fuel system and this turbo's prone to creep. you're going to have to adjust the arm on the wastegate actuator to make it function properly, as well.

there's a few other topics i've seen with people talking about having to adjust the arm in order to avoid problems. i dont really understand why though? i figured that its already adjusted if the flap is fully closed when there's no pressure, so when there's pressure it should open correctly. i'm kinda lost and half dont know what i'm talking about anyway.

 

[optional187]

You'll just want to check to make sure the wastegate isn't opening up too far or not opening enough. If it's too tight, it will boost spike like a mofo. If it's too loose, it will bleed off or creep. On my wastegate there is a threaded rod with a locknut against another piece that run's on the threads and has a hole on the end that hook's to the flapper on the turbo. Hope this make's some sense. It's kinda hard to explain. You'll want to pull the cotter pin (or whatever is holding the rod to the turbo) and remove the rod from the turbo and adjust it in or out so that the flapper is all the way closed tightly. You'll should have to use some pliers to grab it and hook it back to the turbo since you will be figthing the spring tension. Hope this help's.

helps a lot actually, thanks. how do i even know if i need to do this? the turbo's going on the car tomorrow and i'm *hoping* for little to no problems. the flapper is fully closed, havent tried to move the wastegate arm or anything though. should i be able to move the arm and open the flapper with my hands?

 

[daren_p]

Is this a real MHI 16g? If so they don't normally come from the factory with an adjustable actuator. Normally these will have the correct pre-load set correctly from the factory but if for some reason you need additional seat pressure you can add a washer or two under the mounting points between the WG actuator & the compressor cover (you shouldn't need to do this unless your trying to run big boost & you have a ported WG hole/flapper, etc).

 

[optional187]

Is this a real MHI 16g?

no sir...i'm actually risking an ebay version.

 

[8urv8]

helps a lot actually, thanks. how do i even know if i need to do this? the turbo's going on the car tomorrow and i'm *hoping* for little to no problems. the flapper is fully closed, havent tried to move the wastegate arm or anything though. should i be able to move the arm and open the flapper with my hands?

No you can't move the arm with your hand's. The spring tension will be too tight. You can just take off the cotter pin and pull the arm off the flapper (with pliers). If you do this you will be able to figure out exactly what I mean.