New Turbo No Boost

[dsmnthamakin]

Hey guys im stuck. I recently Purchased a super 20g turbo from e-bay because the waste gate actuator arm on my stock turbo rusted and broke off, causing my car not to boost. So i decided to upgrade. when i got my new turbo it would not produce any boost, all my vacuum lines are good, checked my piping to the front mount, i also tried hooking my MBC to try and change it but it did nothing. I checked the waste gate actuator and it seemed okay, so i thought maybe there is something internal on the turbo. I sent it back got it warrantied. Now i just installed my new one and still have nothing. plenty of vaccuum but still no boost i just Bent all new Piping for my front mount. i work at a shop so i have access to All-Data to do most checks but i am out of ideas. i have done all the basic checks except a boost leak test. but i figured since i just made all new piping that would kind of eliminate that right? Could there be something stuck in my intake manifold no letting it boost. because my BOV does not vent like it is supposed to, it still releases air but not the high pitch it would do under normal boost. this is my setup if it helps.
90 GSX
3in Turbo back exhaust
Stock 2.0 Block
GM MAF Translator ( so i can vent my HKS Ssqv)
Apexi Safc
Aem Uego
MBC (not hooked up right now just till i figure out whats wrong)
Front Mount (with 2.5 piping)
Walbro 255lph
Any help would be apprecitaed. I tried to find other forums but nothing that pertains to what i have.

 

[noonan98turbo]

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Check out this video I found in regards to an ebay turbo and see if this answers your question.

 

[soccerplayaz16]

yea if i had to guess i would say its the wastegate

 

[dsmnthamakin]

Hey thanks alot i swear thats what i thought it was i am going to try it 2morrow thanks again

 

[soccerplayaz16]

yeah believe it or not my MHI 16g had a stuck wastegate when it came in brand new. good luck!

 

[dsmnthamakin]

question i had my turbo has the port for the flap welded does it have another way for the exhaust gas to get around. i kno on the stock turbo it has another port for the gas to come out of straight into the exhaust well this one does not?

 

[soccerplayaz16]

ok it sounds to me like you bought a turbo that needs an external wastegate.....do you have any pictures of the turbo you bought? If the flapper has been welded shut you will need to purchase and install an external wastgate

 

[dsmnthamakin]

see i got a whole kit from e bay with manifold and everything and the exhaust pipe that connects to my down pipe

 

[dsmnthamakin]

that is the exact turbo. exact item. i got tubular manifold that does not have a spot for an external waste gate and the pipe that attaches to that end of the turbo to the exhaust.. could i just open that port an weld a pipe from that to the exhaust?

 

[No_Skillz]

That turbo has the port for the flapper welded shut. It is set up for an external gate mounted on the exhaust manifold (pre-turbo).

You will either need to modify your manifold to accept an external gate or buy one with the provisions to mount one.

You can open up the hole, but you no wastegate actuator or arm. It's even questionable if the flapper is in there. With an opened wastegate port, you have the option of mounting an external wastegate on the 02 housing (post-turbo) but have eliminated the option of a manifold wastegate.

Research before you buy.

 

[dsmnthamakin]

I did and when i saw that i called the company before i bought it. they insisted that it was internally gated. i questioned them a couple times because im fairly new to upgraded turbos but i could see the obvious difference. but they assured me just install and go.

 

[soccerplayaz16]

well you have 2 options...return it and try to get your money back or get an external wastegate

 

[dsmnthamakin]

another pic if it helps this is the full view.

 

[dsmnthamakin]

okay thank you guys i really appreciate it alot. i was at a loss on ### else to do. thanks again

 

[No_Skillz]

Second picture you posted is very different from the first one. It is indeed internally gated. The first picture has a welded plug where the wastegate port is and NO wastegate actuator nor arm.

 

[dsmnthamakin]

it is the same just the first pic is taken at an odd angle if you look you can just barley see the end of the arm on the first pic.

 

[dsmnthamakin]

that is exactly why i called the company because it had a waste gate actuator but the plug was welded shut. It made no sense to me. But they assured me that it would work, and it did not. the pics u see are the same exact turbo. and being the way it is , is whats got me confused.

 

[noonan98turbo]

The second picture clearly shows that the turbo is internally gated. But for some odd reason I have a feeling that they could have also welded the flapper shut and you happened to receive a turbo that was a defect from the manufacturer. If I were you I would call the company again and let them know that it is indeed internally gated but the flapper has also been welded shut. That is deff a good reason why you are not building any boost.

 

[soccerplayaz16]

yeah call the company....they might have made a simple mistake....who knows gl

 

[Jeff99GS]

If you have the wastegate acuator then just Grind off those welds and open that hole up!

It almost looks like the inside of the turbine outlet connects to the side where the wasgate flapper is?

If you look in the Turbine exit hole can you see the wasgate flapper?

 

[JusMX141]

That turbo has the port for the flapper welded shut. It is set up for an external gate mounted on the exhaust manifold (pre-turbo).

That style of turbine housing uses an internal flapper beneath that welded plug that isn't visible without looking up into the turbine housing outlet.

The first and second photos he posted are of the same turbine housing.

I have at least (3) of these housings at my shop if you'd like me to take photos to clear up the mess.

 

[dsmnthamakin]

thank you. I will probably call them tomorrow because i knew that it did not look right. if they can send me a new mani with external waste gate would you recommend that? and with it being internally gated would it cause any problems if they do decide to just send me a mani with the external waste gate? or would i be able to just throw the mani on with external gate as is an be fine?

 

[dsmnthamakin]

That style of turbine housing uses an internal flapper beneath that welded plug that isn't visible without looking up into the turbine housing outlet.

The first and second photos he posted are of the same turbine housing.

I have at least (3) of these housings at my shop if you'd like me to take photos to clear up the mess.

so are you saying it is supposed to work that way ? i would appreciate pics if u have them. thanks in advance.

 

[JusMX141]

If you have the wastegate acuator then just Grind off those welds and open that hole up!

The welds you are seeing IS NOT THE FLAPPER. The flapper is just beneath the welded plug.

If he were to remove the plug, there would be a huge exhaust leak as the downpipe they give you does not cover the hole.

This is simply a knockoff version of a Hahn Super 20G.

 

[JusMX141]

so are you saying it is supposed to work that way ? i would appreciate pics if u have them. thanks in advance.

Yes, this is how it is supposed to be.

Being that the actuator is adjustable, verify that the proper tension is set. It could simply be that the actuator is set too loose and the flapper is hanging open.

With the actuator arm off and the flapper completely closed, it should offset the diameter of the hole by about half it's distance so you'll have to pull out slightly on the actuator arm in order to hook it on the flapper lever.