Single Turbo RX-7's Questions about all aspects of single turbo setups.

help me choose a new turbo

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Old Dec 11, 2008 | 06:26 PM
  #1  
notveryhappyjack's Avatar
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help me choose a new turbo

my search is not working

are there options for a stock s5 manifold turbo upgrade. Right now I have a to4s coldside and a stock hotside which I reallly like and is nice and responcive.
Problem is the hotside is leaking oil and when I park the car then start it all the oil burn off into the exhaust and causes a huge smokeshow. This turbo has been rebuilt twice now, I'm not positive how many times you can rebuild one of these and want to research a new unit.


I'm looking to run 10-13 psi daily on this turbo and my current one seems to be working very hard at 14psi when it peaks, I want one with a higher efficenciy range where I'm not working it so hard to get similar results.
any help or opinions is appreciated.
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Old Dec 11, 2008 | 07:38 PM
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You just need to move to a full T4 turbo, not a hybrid. However that requires a new manifold, downpipe, cooling lines etc...
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Old Dec 11, 2008 | 08:19 PM
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I dont think that your turbo is causing your smoke.

Normal problems from a dead turbo seal is smoke after long periods of idling etc.

Smoke on startup sounds like water seal or dead oil control rings.
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Old Dec 11, 2008 | 09:54 PM
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when the engine is fully heated or after 70c on the pfc there is no smoke. On the other hand the last time I drove it boosted just fine, 1.02 bar which is a little higher then I have my profec set to.

I popped the hood and all the smoke coming out was in the exhaust or the rest from the turbo, you have me scared now.
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Old Dec 11, 2008 | 10:41 PM
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Turblown's Avatar
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If you have oil in your intercooler pipe its your turbo. If you have an external oil leak on the center section of your turbo, or oil in your turbine housing/downpipe its your turbo. If you have oil on your spark plugs its your engine.
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Old Dec 16, 2008 | 02:09 AM
  #6  
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after looking today I see water (condensation I believe) coming from the bottom of the turbo. Seems like I have a hairline crack on the bottom.

there is oil inside teh ic. been that way for a few months now.

I drove the car today and it didn't smoke a rediculous amount. I never shut it off until I parked it so I couldn't try to repro the huge smoke show.

Anyway back on it, what turbo could I replace mine with ?
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Old Dec 16, 2008 | 05:45 PM
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Full t4 like someone said...but if you have to have direct bolt in a BNR stage 2-3 would be good. My stage 3 gets 15 psi at 3800 rpms...the only way to get near stock spool response and have more power is a non hybrid turbo..
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