Turbine housing size difference in compounds

Noreaster

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Jun 13, 2007
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Thinking about swapping a smaller turbine housing in place of the 1.32 T6 on my primary turbo, will a smaller housing be different in size as far as the flange being shorter or taller from the centerline of the turbine bore that will affect fitment of the hot pipe?
 

Mpsoldier

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Mar 10, 2010
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I believe what you looking to get a 1.10ar or equivalent and if so that would be a t4 housing so yes the hot pipe flange would need a t6 to t4 adaptor.
 

Yellow Jacket

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Feb 11, 2009
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I know there the same Brian, I was referring to the flange potentially being in closer on a smaller a/r housing than the 1.32 housing & having a potential gap at the end of the hotpipe

I have swapped them 2 housings on a couple kits I built. They are direct matches on inlet and outlet locations
 

Noreaster

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Ill report back in a couple weeks
a couple weeks turned into 4 months
finally swapped housings yesterday, it does spool quicker with the 1.10 but the egts climb alot faster as expected. I dont know what the exhaust pressure is, I gave up dealing with the soot clogging up the line & eventually getting into the gauge.
 

coker6303

Keep Calm and Chive On!!
Aug 6, 2009
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I just swapped mine over Sunday night to a 1.10 housing. Bolt up, no issues.

Spool up and part throttle are much better and super clean. From a standing launch no boost, I can't tell sotp any change but if you are cruising with any boost it comes right up if you get in the throttle.

What I noticed before was the small turbo would come up and almost hesitate a little as the big turbo picked up momentum. Not anymore, the 2 are much more in sync with each other.

I can't comment on EGT's, I'll try to look today
 

coker6303

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Aug 6, 2009
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EGT's don't seem to be a concern to me. They might rise quicker, can't tell you that but as far as peak there is no issue. On the daily driver tune that runs 12.3's I am just easing past 1100F at 90mph. Might hit 1150 by 110mph. No real heat change for me.

Definitely hits harder and runs better from a roll. smoke clears up very quick if you jump off in it. :thumb:
 

Hot COCOAL

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Jun 9, 2012
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EGT's don't seem to be a concern to me. They might rise quicker, can't tell you that but as far as peak there is no issue. On the daily driver tune that runs 12.3's I am just easing past 1100F at 90mph. Might hit 1150 by 110mph. No real heat change for me.

Definitely hits harder and runs better from a roll. smoke clears up very quick if you jump off in it. :thumb:

So is this the 366/480 set up Russ?
And now the 480 is a 1.10AR, and used to be a 1.32AR?

And is the 66 a billet comp with a .90AR ?
 

JoshH

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Feb 14, 2007
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So is this the 366/480 set up Russ?
And now the 480 is a 1.10AR, and used to be a 1.32AR?

And is the 66 a billet comp with a .90AR ?
The small turbo in his setup was an S300 with a 64.5 mm FMW (billet) compressor and a 70 mm turbine in a .90 T4 turbine housing. The S400 had an 80 mm Batmo Wheel with a race cover and a 96 mm turbine that he changed from a 1.32 T6 housing to a 1.10 T6 housing.
 
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Hot COCOAL

May the farce be with you
Jun 9, 2012
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The small turbo in his setup was an S300 with a 64.5 mm FMW (billet) compressor and a 71 mm turbine in a .90 T4 turbine housing. The S400 had an 80 mm Batmo Wheel with a race cover and a 96 mm turbine that he changed from a 1.32 T6 housing to a 1.10 T6 housing.

Thanks Josh
:hug: