Holset Turbine Housings
 

Does anyone know how to convert Holset turbine figures (ex: 16cm^2) to A/R?

try this link lafinrat and let me know if it helps: http://not2fast.wryday.com/turbo/glo...rbo_calc.shtml

http://www.turbofast.com.au/javacalc.html


this one is interesting......................

I've been to both of those, and other places, and can't seem to find any data on how Holset measures their turbine housings. I'm going to call ht turbo tomorrow if I get time.

I just found out a lot about this...

There is NO direct relationship between Holset's measurements and A/R. And even two different model Holsets with the same ex measurement will have different A/R. The only way to tell what you have is to measure it; either with expanding foam molds or other methods.

I was told the approx A/R of a HX35W with a 16cm^2 housing is .90-.95,
14cm^2 is ~.80 A/R, and 12cm^2 is ~.70 A/R.

That sounds about right.

That's great info man..........

here is some info I found about holsets....

Model:........Compressor/Turbine
Holset H1D....1.85/2.165
Holset H1D....1.969/2.165
Holset H1D/E..1.969/2.165
Holset H1D/E..2.047/2.165
Holset H1D/E..2.126/2.165
Holset H1C/E..2.126/2.244
Holset H1C/E..2.283/2.244
Holset H1C/E..2.126/2.362
Holset H1E....2.205/2.362
Holset H1E....2.283/2.362
Holset H1E.... 2.362/2.559
Holset HX40... 2.362/2.559 ........... 60-1……2.324/3.000”
Holset HX50... 2.48/2.835 ........... 62-1………2.441/3.000”
Holset HX50... 2.638/3.031 ............ Tso4……..2.300/3.304”
Holset HX55... 2.638/3.031 ............ T-61……..2.382/3.544”
Holset HX55... 2.835/3.031 .......... T-64……..2.490/3.670"
T-66…… 2.580/3.584”
T-70………2.720/3.850”
T-72………2.840/4.030”
T-76……..3.020/4.030”


Turbo______CFM______Racing HP____Daily HP
HX35______600________420_________330
HX40______800________560_________440
T66_______800________560 _________440
B1________900________630_________495
H2E_______1000_______700_________550
HX50______1000_______700_________550
HX55______1050_______735_________578
HT3B______1100_______770_________605
T76_______1350_______945 _________743
HT60______1400_______980_________770
B2________1500_______1050________825
HX60______1550_______1085________853
T88_____1450-1750__1015-1225____798-963
HT4B______1800_______1260________990
Big Brother_1900_______1330________1045
T91_______2000_______1400________1100
HC5A/HX82_2450_______1715________1348
T100______2600_______1820________1430
T105______2900_______2030________1595

damn, that is great info too.

If anybody is looking for a holset intake housing, I have 60mm that I will sell pretty cheap. When I ordered my hp turbo kit I ordered the stage 2 and they sent me the wrong one and they never asked for it back. So let me know.

There is some awsome stuff in this thread. I think this pic might help, I saved it a while ago. TO check it for accuracy I would like to perform the measurement on a turbo of known size.

http://www.outlawperformance.com/uploads/turboratio.jpg