Single Turbo For Rb26

[discopotato03]

Frame size . Garretts BB turbos in the GT2554R to GT3582R are said to use the GT25 sized or small frame centre section . The large frame GT BB centre section from memory starts at the OEM GT3576R through the GT3782R's (two different comps) the GT3788R (all these use the diesel spec HP series turbines) to the GT4088R , the GT42R's etc . I think they are a BB mod to the GT bush bearing centre which also uses the four ears to bolt the turbine housing to . The large frame turbos (both ball and bush bearing) have a compressor backplate bolted to the comp end where the small frame BB's use a large circlip and a range of adapter rings to suit the chosen compressor housing family ie T3/T04B/T04E and T04S . The compressor end face of the small frame bearing housing is machined to accept 60/71/76 and 82mm OD compressors where in the large frame variety this is machined into a removable compressor backplate .

When you look at a small frame BB cs (centre section) its shorter and smaller in diametre than a T3/small shaft T4 or the Nissan Hitachi BB cartridge ie RB20/25/VG30 . The large frame version as a larger shaft diametre and a larger/longer bearing pack and housing . A few people have hinted to me that the large frame ball and bush bearing shaft is same/similar but not 100% sure . I do have a bush GT3576 to gut eventually but need to heat the turbine housing to get it off . One day ...

Cheers A .

[Billet Ricky]

Frame size . Garretts BB turbos in the GT2554R to GT3582R are said to use the GT25 sized or small frame centre section . The large frame GT BB centre section from memory starts at the OEM GT3576R through the GT3782R's (two different comps) the GT3788R (all these use the diesel spec HP series turbines) to the GT4088R , the GT42R's etc . I think they are a BB mod to the GT bush bearing centre which also uses the four ears to bolt the turbine housing to . The large frame turbos (both ball and bush bearing) have a compressor backplate bolted to the comp end where the small frame BB's use a large circlip and a range of adapter rings to suit the chosen compressor housing family ie T3/T04B/T04E and T04S . The compressor end face of the small frame bearing housing is machined to accept 60/71/76 and 82mm OD compressors where in the large frame variety this is machined into a removable compressor backplate .

When you look at a small frame BB cs (centre section) its shorter and smaller in diametre than a T3/small shaft T4 or the Nissan Hitachi BB cartridge ie RB20/25/VG30 . The large frame version as a larger shaft diametre and a larger/longer bearing pack and housing . A few people have hinted to me that the large frame ball and bush bearing shaft is same/similar but not 100% sure . I do have a bush GT3576 to gut eventually but need to heat the turbine housing to get it off . One day ...

Cheers A .

Billet Turbochargers core, back plate, ball bearing system and turbine shaft size don't share any common parts with the Garrett turbo's.

It's the small frame turbo's that are not in production as yet. Hopefully early next year you will see a range small frame Billet turbo's including some bolt on models for RB26's.

MR Turbo Australia / Billet Turbochargers do rebuild and high flow all makes and models of turbo's including the Garrett GT BB turbo's from the GT30R's up to the T04Z. This is done by machining out the Garrett core, then using a similar ball bearing system as the Billet Turbo's but adapted into the Garrett core and Shaft. The guys can do the same thing with the Nissan Hitachi BB turbo's (RB20, RB25, VG30)

Sincerely,

Ricky Numeyer.

[R31Nismoid]

fantasy - the results/awards etc you keep speaking of are all well and good... But you never answer the comparo questions.

Just throw up "they have won this award etc". Which really doesn't mean anything to people here as far as i see it.

[Turbz_13]

i am leaning toward the t04z...can someone tell me the smallest rear housing that ya can get with it? smaller than a .81?

[luke20t]

i am leaning toward the t04z...can someone tell me the smallest rear housing that ya can get with it? smaller than a .81?

check the garrett website.

the .81 is a good size but.

[Billet Ricky]

Comparison

Garrett T04Z = .70 A/R T04S compressor cover.

Billet Z-P = .70 A/R T04S compressor cover.

Garrett T04Z = T04Z/T04R compressor wheel.

Billet Z-P = T04Z/T04R compressor wheel.

Garrett T04Z = Cast aluminum back plate.

Billet Z-P = Anodized billet aluminum back plate.

Garrett T04Z = Cast iron core.

Billet Z-P = Anodized billet aluminum core.

Garrett T04Z = Steel ball bearings, phenolic (plastic) bearing cages.

Billet Z-P = Full complement Aeronautic grade silicon nitride (ceramic) ball bearings. No bearing cages.

Garrett T04Z = GMR P trim turbine.

Billet Z-P = Inconel P Trim turbine.

Garrett T04Z = Garrett T04 exhaust housings.

Billet Z-P = Depending on availability. Billet T04 exhaust housings, Garrett T04 exhaust housings, Precision Turbo USA T04 exhaust housings.

As you can see both of these turbo's are very similar.

Other than the obvious Billet core the main differences are the materials the turbines are made from and the ball bearing system.

Inconel is a superior more robust material for turbines.

The silicon nitride ball bearings used in the Billet Turbo's are perfectly matched Aeronautic grade ball bearings and races.

The silicon nitride balls are over 200% lighter, have a truer shape and can handle quite a lot more heat and punishment than steel balls.

Full complement ball bearings mean they do not use a bearing cage.

No bearing cage means no extra weight or drag on the ball bearings.

Because the ball bearings are lighter, they have a truer shape, are made of stronger materials and have no extra drag or weight from a bearing cage they spin up faster and can handle more punishment by design.

There is nothing wrong with Garrett's turbo's and they do a great job of mass producing turbochargers.

The Billet Turbochargers are a high end performance turbocharger.

Regards,

Ricky Numeyer

Edited October 16, 2007 by Billet Ricky