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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

What happens when you fit too big a compressor wheel?

Old Oct 18, 2013 | 03:41 PM
  #21  
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Originally Posted by delcbr
I am thinking of converting my td04L-13t to a 19t is this too big in relation to the turbine? what happens when you increase the size of the compressor without increasing the turbine will this lead to any problems do I need to port the wastegate or is that just for boost creep?
The stock 13t wastegate is pretty big to begin with so it can probably cope with the increased mass flow when a 19t wheel is fitted.
I'm guessing the 08 wrx td04-19t uses the same wastegate size as the earlier 13t ones?
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Old Oct 18, 2013 | 03:57 PM
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Yep.

And if its enough not to overboost on a big 'ol 2.5L that generates a bunch more exhaust gasses than our 1.8 BP, I'm pretty sure you won't have any problems.
Old Oct 18, 2013 | 05:12 PM
  #23  
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18psi, Leafy.. you have convinced me!

Just ordered this Turbo Compressor Upgrade Kit SUBARU WRX Forester TD04L-19T Extra 30% Torque & Top End
Old Oct 18, 2013 | 05:25 PM
  #24  
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Nice. Post before and after results if you can
Old Oct 18, 2013 | 05:26 PM
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In for 300whp td04 miata results.
Old Oct 18, 2013 | 06:41 PM
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I'm assuming this item can fit the 13T as well?

Mitsubishi TD04HL Turbine Wheel 9 Blades Spool faster

And if so, how much real benefit is there?

Leafy, can you link to the STS turbine you speak of?
Old Oct 18, 2013 | 06:45 PM
  #27  
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Originally Posted by karter74
I'm assuming this item can fit the 13T as well?

Mitsubishi TD04HL Turbine Wheel 9 Blades Spool faster

And if so, how much real benefit is there?

Leafy, can you link to the STS turbine you speak of?
You already did.
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