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[pmpsht]

Originally posted on CP on 12-14-2005 (Post found on imazda.com)  
Maybe sticky this Mods?

TURBO GLOSSARY:

http://www.not2fast.com/turbo/glossa...glossary.shtml

TURBO CALCULATOR: (for choosing compressor sizes)

http://www.not2fast.com/turbo/glossary/turbo_calc.shtml

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EXCELLENT SITES

Compressor maps and theory
http://www.stealth316.com/2-3s-compflowmaps.htm

VF10/8/12 Hybrid How-to
http://www.fordlaser.com/forum/viewtopic.php?t=26377

GTX-GTR Engine and Turbo Differences
http://mazda4club.forumsplace.com/message-20.html

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RHB5 FAMILY TURBO INFORMATION

from Mazda323performance

VJ-6 Very early '85 - '86 BFMR Japanese Imports
VJ-12 Early '86 BFMR Japanese Imports
VJ-13 '86 - '87 BFMR Japanese Imports
VJ-14 American BF Model 323GTX (flows 200 cfm)
These are all about the same size. Only differences are the water lines?

VJ-16 Upgrade turbo available in the US
VJ-17 Group A turbo used in the WRC (no wastegate, external wastegate)
I believe these are both about the same size(larger/freer flowing wheels than the VJ14?). Good for 17psi on a 1.6L
Also heard they have larger bearings?

Smaller to bigger:
VJ20 - BPT turbo, sounds about the same size as the VJ16 or 17, good for 13-14psi on a 1.8L
VJ11 - MX6/626/Probe

VF10 - Subaru Legacy, VF10 is bigger than the VJ11, VF8 is bigger
VF11- automatic Subaru Legacy, same as t-bird comp?
Warner-Ishi T-bird (flows 381 cfm)
VF8/VF12 - Liberty RS (47.5mm inducer, 60mm exducer compressor wheel)

VJ23 - 323GTR, BHF6, ball bearing, (52mm inducer 65mm exducer compressor wheel, 60 mm exhaust wheel)

Hybrids I knows, (coldside/hotside) or (compressor/turbine)...
VJ11/14 - Most popular here in the states, spools up 500rpm quicker than stock, cooler intake temps (for larger comp), I've heard it will do 20psi and 19 till redline
VF10/VJ14 - A little bigger, lags slightly more than stock?
VF8/VJ14 - More lag than stock
VF8/VJ11 - Big dog, 300hp turbo; comparable to a T3?

T-Bird comp/VJ16 turbine (sounds kinda like a VJ20 with a VF10 comp)

WRX/VJ14 - The TD04 is a small turbo - comparable to a VJ20

Garrett GT/VJ14 - Custom turbo, Corksport can build these

Turbine Housings:
Don't know if it refers to a/r or trim?? But it's cast into the side of the housing.
Smaller to bigger:
VJ14/16/17 = 12r (VJ16/17 have freer flowing wheels?)
VJ20/VF10/VF11 = 15r, larger wastegate port? (*note*: the VJ20 does have a larger, octogon-shaped inlet)
VJ11/VF8/VF12 = 20r
VJ23 = larger than 20r

VF11 Turbo Specs:
Inlet Diameter: 2"
Outlet Diameter: 1.75"
Air Flow Rate: 1.4 - 10.8m3/min or 49.4 - 381.4ft3/min
Max Pressure Ratio: 2.8
Maximum Speed: 18540rpm
Compressor: 0.4 A/R, 37mm trim
Turbine: 0.52 A/R, 40mm trim
Misc Numbers:
Turbo Spec. VF 119006
Serial No. RHB5 14055W
Parts No. 14412AA070

Warner-ISHI RHB5 (T-bird turbo) Specs:
Air Flow Rate: 1.4 - 10.8m3/min // 49.4 - 381.4ft3/min
Max Pressure Ratio: 2.8
Maximum Speed: 180 x10^3rpm
Max Allowable Gas Temp: 950 oC // 1742 oF
Diesel Engine Application: 54-154Ps
Gasoline Engine Application: 73-208Ps
Flow:381 CFM

Resource
http://www.robietherobot.com/storm/..._mods_turbo.htm (I think this info is on the Ishi-Warner t-bird turbo and not the VJ11)
http://www.mx6.com/forums/forumdisp...p?s=&forumid=61 (MX6 forum)
http://www.fordlaser.com/forum/view...der=asc&start=0 (good IHI info)

I calculated the max flow of the VJ20 to be 350cfm. This is based on it being able to hold 12psi at 7000rpm on the 1.8 GTX motor. This is based on my observations as well as what I have heard from other GTX owners.

It is worthwhile to note that in order to hold 15 psi on the 1.8 litre motor to 7000rpm a turbo needs to flow 385cfm.

As shown below, the VF10/VF11 hybrid which is the easiest turbo upgrade for our cars can supply 381 CFM. It is a mild upgrade but it will hold that 15psi to redline and will hold 17 psi to 6500rpm. Overall it will give a good midrange and topend gain over the VJ20 and can be used with stock GTX engine management (Although at its very limits)

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How to calculate CFM requirements for an engine

For a forced induction engine:

CFM = CID*RPM/3456*(Volumetric efficiency)*(boost%/100 above atmospheric+1)

where

CID = cubic centimeters (cc) * 0.06102
Volumetric efficiency is assume 0.85
Boost --> if you are running 14.7 psi of boost you are running 100% above atmospheric pressure

[1992xr2]

Wow, good info!

[pmpsht]

I've been told some of this info is incorrect, so please if you see something, let me know and I'll edit my post.  I took this info from another forum so it's not from me.

[Yuri]

yuri demands sticky

[Rocketman]

Sticky'd

Cory, I know 323performance said some of the info may not be 100% accurate, could you try to update this if anything is found to be different?

[rcicustoms]

excellent write up ....im very impressed..

ive seen bits and pieces on the internet, on most of that info.. but you went and collected it all up and posted it in one spot...
 good call... and yes some info is off, but close. and from being compiled from tons of other forums... theres enough info to find out what you need to know... big props...

ive kinda gone a different way, and flanged a b6t mani to hang mitsu turbos.. then i got hold of a tdo5h-14b... flow on that turbo is 408 cfm
which will hold 20 lbs to 7500 rpm if i want it to... and if i ever want more... the small 16g,,big 16g,,and 20g will all swap directly into my hotside. and quick too since mitsu turbos are v-band... ...more flow, exhaust. and compressor.
but still smaller than a t3-t4 garrett.. and should spool faster than one...
 
aggain excellent writeup.....Joe

[Gaz]

Necro'd.

I have a stock VF11 kicking around. What can I combine from the VJ14 to constitute an upgrade?

[NomakeWan]

The VJ14 hot side components. The idea is that the smaller VJ14 turbine will cause the VJ11 compressor to spool faster, thus giving you the advantage of the VJ11's airflow with the spool time of the VJ14. Details are in the pinned thread at the top of this forum:

http://teamcapri.com/forum/index.php/topic,2867.0.html

[Rocketman]

The VJ14 hot side components. The idea is that the smaller VJ14 turbine will cause the VJ11 compressor to spool faster, thus giving you the advantage of the VJ11's airflow with the spool time of the VJ14. Details are in the pinned thread at the top of this forum:

http://teamcapri.com/forum/index.php/topic,2867.0.html

VF11 is a Subaru OEM turbo. It's about the size of the T-bird compressor, if not identical.
Hybrid it with a VJ11 hot side. VJ14 hotside will choke it.
I cast adapters for the VF11 inlet, if you need one.

[NomakeWan]

Ack, I didn't see the F on there. That's what I get for not reading it twice before replying. Sorry about that, Gaz!

[Rocketman]

  It's an exceedingly easy error to make!

[Gaz]

The VJ14 hot side components. The idea is that the smaller VJ14 turbine will cause the VJ11 compressor to spool faster, thus giving you the advantage of the VJ11's airflow with the spool time of the VJ14. Details are in the pinned thread at the top of this forum:

http://teamcapri.com/forum/index.php/topic,2867.0.html

VF11 is a Subaru OEM turbo. It's about the size of the T-bird compressor, if not identical.
Hybrid it with a VJ11 hot side. VJ14 hotside will choke it.
I cast adapters for the VF11 inlet, if you need one.

How much for that adapter?

[Gaz]

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