To4e Upgrade To To4z

[Light]

Hi mates,

I am thinking of changing my turbo from TO4E to TO4Z but wondering if I will need to do any modification to my downpipe and headers???

Edited December 20, 2006 by Light

[Full-Race Geoff]

if your t04e is a divided, twin scroll T4 turbo, no changes are necessary.

otherwise, to properly use a t04Z, you will need a divided twin scroll t4 manifold. dual wastegates are best. it might make more sense to use a different turbo however

[R31Nismoid]

Depends what type of T04z, Garrett or HKS and the rear housing etc.

I dont think the dimensions of either are the same as a T04e

Although, i dont see how dual wastegates are better than a single if you properly design it all and the manifold is correctly made

[B-Man]

Garrett and HKS rear housing v-bands are definitely different.

Oil line might need a different fitting too.

[discopotato03]

Technically speaking Geoff is right , a propper "TO4E" turbo uses a T4 turbine and T4 turbine housing . For the record so does the TO4Z turbocharger which has the TO4 "P" trim turbine and any T4 turbine housing profiled for the P trim turbine wheel . If you had a TO4E with the P trim turbine its housing would interchange with a TO4Z turbo/cartridge .

Where TO4E turbo's got confusing is that small shaft TO4 and T3/TB31/TA34 turbines all use the same basic shaft dimensions and so the T3 etc/TO4E hybrids grew out of interchangeability . Mind you just because they fit together doesn't mean they work very well , sell yes , work maybe .

TO4 P trim type turbine housings are availabe in single and dual entry T3 , T4 and T4 International stud/flange pattern . HKS's unique housings are large T4 twin entry (though open to single entry not far inside) housings with a particular V band size . Garrett makes TO4 housings in a variety of outlet styles including four bolt , six bolt , V band and slip ring type .

Basically what the feller that started this needs to ask himself is do I need a 700 odd Hp capable turbocharger or would a 500 Hp one do the job required , that's the real issue here .

Cheers A .

[Light]

thanks guys for the replies

the turbo I was thinking of is the garrett t04z (not sure about proper rear housing for my application though)

do I need a 700 odd Hp capable turbocharger or would a 500 Hp one do the job required

the 500 HP will do

[R31Nismoid]

well get the smallest GT30 then with the GT series wheel, 500hp rating.