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3T-GTE
Regular


Location:
Melbourne
Registered:
August 2003
Re: 1jz dyno... whats wrong!? Fri, 05 March 2004 03:46 Go to previous messageGo to previous message
It could be the turbos.

I have had many problems with the standard turbos once I started tweaking them past stock boost.

First I would say, I know from experience that the standard twin CT-12As won't last very long if you're running them past 11psi. They have quite fragile ceramic wheels, which are prone to falling to bits once they are stressed too much. Yes, you can run it up to 16 psi, yes they will do it, but don't expect them to last long.

My suggestion would be that if you want more power, to replace them sooner rather than later - you will save yourself from lots of headaches later.

I also had a problem with the cat converter ended up collapsing & blocking the exhaust flow... I didn't really notice until I started getting more power out of the engine.

If you really want to stick with the standard turbos make sure you have a twin dump pipe setup & if you want to go to the little extra effort to tweak the CT-12As (without a full rebuild / Highflow - which I would say would be a complete waste of time) I would also suggest the wastegate mod to ensure it can cope with the higher boost levels without spikes etc..

So if you don't have any luck with other solutions, try the ones I have mentioned above.
Let us know how you go.

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SubjectPosterDate
Read Message   1jz dyno... whats wrong!? 240jzWed, 03 March 2004 16:25
Read Message   Re: 1jz dyno... whats wrong!? lumpyWed, 03 March 2004 22:50
Read Message   Re: 1jz dyno... whats wrong!? Celia-SueThu, 04 March 2004 02:50
Read Message   Re: 1jz dyno... whats wrong!? 240jzThu, 04 March 2004 11:13
Read Message   Re: 1jz dyno... whats wrong!? HedgehogSandwichThu, 04 March 2004 12:32
Read Message   Re: 1jz dyno... whats wrong!?  3T-GTEFri, 05 March 2004 03:46
Read Message   Re: 1jz dyno... whats wrong!? wil8115Tue, 09 March 2004 08:24
Read Message   Re: 1jz dyno... whats wrong!? 240jzTue, 09 March 2004 09:47
Read Message   Re: 1jz dyno... whats wrong!? wil8115Tue, 09 March 2004 10:44
Read Message   Re: 1jz dyno... whats wrong!? 240jzTue, 23 March 2004 17:00
Read Message   Re: 1jz dyno... whats wrong!? wil8115Tue, 23 March 2004 19:08
Read Message   Re: 1jz dyno... whats wrong!? 240jzWed, 24 March 2004 09:31
Read Message   Re: 1jz dyno... whats wrong!? celicamadWed, 24 March 2004 10:04
Read Message   Re: 1jz dyno... whats wrong!? 240jzWed, 24 March 2004 14:37
Read Message   Re: 1jz dyno... whats wrong!? celicamadWed, 24 March 2004 20:49
Read Message   Re: 1jz dyno... whats wrong!? 240jzThu, 25 March 2004 09:39
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