Hey guys,

Thought I would share something that I did to correct an issue that I experienced on my Greddy TT kit. The coupler that connects to the passenger side turbo is very very close to the turbo manifold. It took 2 years for it to finally happen but the coupler ruptured and in a pretty big way as you can see. I did not have heat wrap on the manifold or turbo IC piping before this either.

I figured to completely eliminate this from ever happening again (since it is a complete PITA to fix), I just welded the elbow directly to the turbo. If any one in doing an install (re-install) I would highly suggest this as a preventative measure. I did not even notice this problem until I started to not hold boost to redline. I thought my turbos were on their way out, but this was the issue.

 

Oh snap, my car recently started holding 2psi less boost than normal...thanks for the heads up Joe

 

I havd thought about that, but does it make getting the turbo out of there difficult? with the pipe welded one, can you still install/remove the turbo without pulling the motor?

 

^^^^

I am not sure about that... But, I always pull the motor when I have to do something to the TT kit. Which hopefully won't be for a long time! lol

 

That is exactly what mine was doing... I would def check that coupler when you get a chance.

 

Very good advise. SGP did this on my car when they installed the new motor.

 

Thanks for sharing. Great pics. Nice work.

 

You guys know way more than I do about this stuff but isn't the coupler there to allow for some flexing and to absorb vibrations and bumps while driving? Would this cause the pipe to crack over time? By the way....those welds look sweet!

 

Nah it's just there so they can use an off the shelf compressor housing with the Z-specific turbo piping. Any vibrations would just be absorbed by the next coupling down the line, a few inches away after the bend.

 

SGP has been doing this for a long time now and its done on my car too. I dont think anyone has ever had a problem with it.

 

about 2.5 years, I ran into CrazyG at the track and he was complaining about cooking through that same coupler. His car was built at SGP back then. I guess they weren't doing it 2.5 years ago.

 

Thanks!

SGP gave me the idea to do it, but I have done this before on Supras...

Sounds like this is a pretty common problem!

 

EXTREMELY common problem. i even had my manifold double wrapped, and about 1/4" gap between the manifold and that coupler, and mine still went through.

 

you sure you haven't popped another plenum?

 

i know what ill be doing this spring

 

Sweet find as i know what i will have done when i build my motor this winter.Also im gonna heat wrap the crap on anything near the turbos or even close to them.

 

Maybe you could get a turbo jacket in addition to wrapping the manifolds.? Just a thought.

http://www.thezstore.com/page/TZS/CTGY/PTC09

 

personally i'm not sure i will go the welding route as there is still a few more things i will do this time around, but if it goes this time, welding is the only answer.

 

the turbo housing is not the prob, the manifold in that area is very close. hence the reason for solid mounts outside of the benefits from them by themselves. with the motor mounted solid you can make a decent air gap between that joint and the manifold and not have to worry about engine bay clearance or the consisent beating against the engine bay it will take to knock it loose.

wrap the coupling with a reflective material, and keep an air gap. atleast wrap that portion of the manifold with wrap, life should be good.

 

I used this thermo tec sleeving around the coupler. Plus, I also header wrapped my manifolds.