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T3 holset Hx40

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Old 03-27-10, 05:02 PM
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Question T3 holset Hx40

I have a t3 holset hx40 turbo,should i swap the t3 turbine housing to a t4 version?

Anyone have any experience on T3 type holset's in terms of performance?
Old 03-27-10, 08:39 PM
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I'm kind of wondering the same thing, I have an H1C though with a 18.5 cm housing... But then again it's probably cheaper just to buy a T3 flange cut the t4 flange off most aftermaket manifolds and weld it on.
Old 03-28-10, 03:05 PM
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Cool

Another reason for my OP is because my turbo has the internal waste gate and i want to phase it out and run an external waste gate. i can weld it shut but i don't trust my welds.

^^ ill probably be cheaper to just get a T3/T4 adapter in your case.
Old 04-01-10, 01:29 AM
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If you want a clean external setup and have a t4 manifold, buy a t4 hotside. They are rather inexpensive.

The thing that does suck about them is IF you get a vband, they are exclusive to those turbos. Meaning a 3" vband that fits a tial, hks, garrett, etc hotside will NOT fit your holset.

You'd still get stuck welding something.
Old 06-26-15, 02:05 PM
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Sorry for the revive. I'm interested in running an HX40 I have on my FC. Mine has the standard 19cm2 t4 vband hotside. NoPistons, would I run int the same issue trying to fit my RB 4" dp onto it? When I mocked it up it fit pretty tight.
I have considered going to the T3 hotside as well, but after some more research, the T4 hotside will do just fine. People are reporting 15-20 psi right around 4000rpm, so it could be worth while for you to get one.
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