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ZX Turbo problems


Boog

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Hey everyone, I'm on my phone and I just got done typing up a huge post only to lose it, so I'll keep this short and to the point. I got an 83 for a turbo swap into my 76 280z, and it starts and idles. The car on a cold start idles but when the throttle is pressed, it chokes and dies. When warm, it revs up, but painfully and only to max 4k rpm. I replaced cap, rotor, plugs, not it. Did an oil change, not related. Took apart the intake, the turbo doesn't spin. I'm now in the slow process of taking off my intake manifold to replace the turbo with one I have. I'm wondering if a stuck turbo would explain my problems, and if not, what else could be an issue? Let me know what other info I can provide, and thanks in advance!

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To run the ZXT with a turbo that is seized..you:

1) Remove the turbo.

2) pull the rotating assembly out.

3) tap the center section for plugs, and lug cold and hot side.

4) reinstall everything

5) use a vice grips to crimp the oil feed line under the intake where it's virtually invisible.

 

 

This will render it as driveable as any NA ZX, to the point where someone will spend hours flogging it through a ditch with his bro-in-law in the passengers seat saying "it seems fine to me" while you are cursing, swearing, and repeating "THIS SOB IS NOT MAKING BOOST! It's way down on power!!! DAMNIT!!!"

 

A SNAPPED off compressor wheel can "pinwheel" and return some drive ability.

 

A SEIZED one will choke performance to a noticeable extent.

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To run the ZXT with a turbo that is seized..you:

1) Remove the turbo.

2) pull the rotating assembly out.

3) tap the center section for plugs, and lug cold and hot side.

4) reinstall everything

5) use a vice grips to crimp the oil feed line under the intake where it's virtually invisible.

 

 

This will render it as driveable as any NA ZX, to the point where someone will spend hours flogging it through a ditch with his bro-in-law in the passengers seat saying "it seems fine to me" while you are cursing, swearing, and repeating "THIS SOB IS NOT MAKING BOOST! It's way down on power!!! DAMNIT!!!"

 

A SNAPPED off compressor wheel can "pinwheel" and return some drive ability.

 

A SEIZED one will choke performance to a noticeable extent.

Totally agree . I did a turbo by-pass on my 84 , bought it with a bad turbo and the engine was extremely dirty . Figured I by-pass turbo ( as mentioned method ) and drive it for awhile before installing a new turbo . With low compression ratio and some restriction on intake and exhaust , it had performance of a 3 cylinders , at best . 

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Or you could make a block off plate that installs into the turbine housing, where the center section would have. ;)

I've seen that done a couple times, easier than all of the work to keep the center section compressor for looks.

 

2012-11-04171156.jpg

 

OR

 

IMG_1264.jpg

Edited by Six_Shooter
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