Turbo identification questions

[soobscript]

In my years of research on here and working on these cars, I have in my head that EA82s have a VF-7 and EA81s have a VF-4 then early Leggys get a VF-11. If that is wrong we can end the discussion. It is also my understanding that the EA81T VF-4 was oil-cooled only.

Well, I pulled the turbo from my 88 RX. The unit is clearly marked as VF-4, and it is water-cooled. I'm pretty sure that it is the same turbo that came in the RX with ~120k miles. The previous owner had it for a couple years and thought that it was an original motor. It could be from a different EA82, or maybe bonus junk from another car purchase, but I'm pretty sure it was my first one and daily driver.

Could it be a rebuilt VF-7 with a VF-4 compressor housing (where the marking are)? One of my motors is one of the JDM imports, could it be a JDM-only legit water-cooled VF-4?

 

[86BRATMAN]

I remember reading that the ea81t's had either a tsb or recall to install a water cooled turbo.  Its quite possible the replacement units were the same as early ea82 turbos

[scoobiedubie]

That turbo is an EA82 turbo and is both oil and water cooled.

[soobscript]

That turbo is an EA82 turbo and is both oil and water cooled.

So do EA82s normally get a VF-4?

[MilesFox]

IHI RHB5 from what i have seen

[soobscript]

There are dozens of different RHB5s.

RHB5 is a IHI frame size that was used in many turbos:

The RHB52w is found in our Mx6/Probe's with the VJ11 from 89-91. A
Warner Ishi RHB52w was also used in the TBird from 87-88 (VC32M -for
manual trans and (VC32A) for auto) *(NOT a VJ17 which are from the non-U.S 323 GTX)*.
Other RBH52w's include: 85-90 Isuzu I-Mark (VI-55), 84-87 Isuzu
Impulse(Piazza)(VI-34), 90-94 Subaru Legacy (VF-11) and all 1.8L T
subarus from 86-91. The VJ20 is in the 1.8L Mazda GTX the 88-98 1.6L 323
had a VJ-14 and the 86-87 2.0L 626 had a VJ-5.



The RHB52 was used in the 84-86 turbo Escorts(VC-31), the 88-89
Chevy Spectrum (VI-55), 91-94 Ford Laser-Capri (VJ-14), 84-95 Mercury
Lynx (VC-31), Ferrari 208, and Bugatti EB110(x4). Fiat used them and
it's a popular turbo for motorcycles. It was also going to be used in a
TT version of the DeLorean, but the company supplying the parts went out
of business before they could build them.

The RHB51w is found in the 84-91 Maserati BiTurbo(VM-3 and VM-4)

Some known RHB52 part numbers:

subaru turbos:

VF10 - RHB52XW - 5200 2 P15NR BRXLL4225CFZ 39.5mm/56mm

VF11 - RHB52XW - 5200 2X P15NR BRLL4016EZ 37.5mm/52.5mm

VF8 - RHB52XW - 10000 3X P20NR BRXLL4625CFZ 43.5mm/56mm

VF12 - RHB52XW - 10000 3X P20NR BRXLL4726CFZ 45mm/56mm
 

Isuzu turbos:

VI34 - RHB52A-10000 3 P25NR BRL3911EZ

VI37 - RHB52W-10000 3 P25NR5 BRL3911EZ

VI23 - RHB52A-10000 3 P25NR BRL3911EZ
 

and the mazda turbos:

VJ11 - RHB52KW - 5200 2K P20NR5 BRL3911EZ 38mm/52.2mm

VJ14 - RHB52MW - 5200 2M P12NR5 BRKL3711EZ

VJ16 - RHB52MW - 5200 2M P15NR5 BRKL3911EZ

VJ17 - RHB52BW - 10000 3B P25NR5 BRL4016EZ

VJ20 - RHB52UW - 5200 2U P15NR5 BRUL3911EZ 36.5/52.5mm
 

Here's a TON more I found:
www.turbomaster.info

More RHB5 compressor/turbine dimensions:
turbointernational.com

^^^ from http://www.angelfire.com/extreme4/mattmouth182_rag/mx6/page.html

[naru]

In my years of research on here and working on these cars, I have in my head that EA82s have a VF-7 and EA81s have a VF-4 then early Leggys get a VF-11. If that is wrong we can end the discussion. It is also my understanding that the EA81T VF-4 was oil-cooled only.

Well, I pulled the turbo from my 88 RX. The unit is clearly marked as VF-4, and it is water-cooled. I'm pretty sure that it is the same turbo that came in the RX with ~120k miles. The previous owner had it for a couple years and thought that it was an original motor. It could be from a different EA82, or maybe bonus junk from another car purchase, but I'm pretty sure it was my first one and daily driver.

Could it be a rebuilt VF-7 with a VF-4 compressor housing (where the marking are)? One of my motors is one of the JDM imports, could it be a JDM-only legit water-cooled VF-4?

 

That is wrong.

The strictly oil cooled EA-81Ts were VF1s.

 

Early EA-82s were VF2s.

I pulled a VF2 from an 85/86, IIRC.

 

VF4s and VF7s followed in later years.

 

The VF1 has noticeably smaller wheels.

The VF2,4,and 7 are almost indistigushible.

 

They are all RHB5s.

RHB52s are a slightly different breed.