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T4 exhaust housing for GT3076R 56T

Yeedogga

By Yeedogga,
in Engines & Forced Induction

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Yeedogga Experienced

Yeedogga

Posted
Posted

HI SAUers,

I have an R33 with a GT3076R on stock manifold with external gate welded to the exhaust housing.

It was worked well but I am now upgrading the manifold to a high mount 6boost because my studs/nuts keep coming loose and I've had enough.

I need to buy a new rear housing when I upgrade manifolds because the way the gate is welded to the current one means it wont fit.

I have found a fair priced used 6boost manifold but it is a T4 twin entry (not twin scroll as it has only one gate provision?)

QUESTION:

Can I buy a T4 flanged rear housing that will fit the GT3076 in .82?

Will it give me any benefit over the T3 flanged housing?

Should I just buy a brand new T3 flanged 6Boost and get a T3 flanged housing.

 

Thanks all

Chris

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Dale FZ1 Veteran

Dale FZ1

Posted
Posted
20 hours ago, Yeedogga said:

 

Should I just buy a brand new T3 flanged 6Boost and get a T3 flanged housing.

 

If you're completely satisfied with the GT3076 (and there's still a lot to like about that turbo on a RB25), then stay T3 high mount and be happy. 

Bear in mind there's a fair bit of fab work to get the piping right and even the gate in correct position.  So it'd be good if future turbo changes allow for direct bolt in spec changes (eg move to a GT35 or something within reason).

I'd suggest you do the homework on alternative brands in the same price or performance range too.  You "might" move away from the Honeywell gear given what the cost of a bare housing is and the funds you could recoup on sale of existing gear.

Besides the higher priced options (EFR, PTE), you'd be mad not to look at BW S256/257, Masterpower/Borghetti MPR54/59, and the Kinugawa range.  There are T4 options amongst those, and the dimensions of a T4 hole may allow for a nicer transition in the collector area of a high mount. 

I don't think T3 single vs T4 single will make much difference to overall performance given your current turbo is going to top out around the 300rwkW mark.  A proper split pulse setup probably will make a difference, at a cost.  

Bottom line for me, you've got to price up the alternative setups and gauge what's most attractive and within your budget.  They are all going to perform differently but no dogs there.  

Garrett preferred? - T3 single scroll, single gate.  Easy move to a GTX3071 or GTX3576 in future.  Don't look back.

Bigger budget? - T4 split pulse, EFR 7670 IW. 

Bigger again? - T4 split pulse, EFR or PTE twin external gates.

Smaller budget? - T4 split pulse, BW S257SXE twin external gates

Smaller again and open mind? - T4 single scroll, BW S257SXE or Masterpower MPR545, single gate.  

Smallest budget, still open minded? T3 single scroll, Kinugawa TDO6-25G, single gate.

  • Like 2
Yeedogga Experienced

Yeedogga

Posted
  • Author
Posted

Thanks heaps for taking the time to reply Dale- i very much appreciate it.

I decided to keep the 3076 as it meets my needs for now.

I have ordered a brand new 6boost with a single entry T3/ ext gate and got a new T3 / V band rear housing to go with it.

I'm interested to see if it increases power/response but will be happy with just an increase in reliability and decrease in likelihood of turbo falling off the manifold!!

Cheers!!

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