Holset turbo info

roachie

roachie

Taco Master
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Nov 2, 2007
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Trying to gather info on all the Holset models for sizing and interchange reasons. (for the triples). Any info or part numbers you can contribute will be appreciated.

WG:Waste Gated
NG: No Internal Waste Gate

Refer to this thread for flow rates: http://competitiondiesel.com/forums/showthread.php?t=2577

HX35 56mm inducer.
Compressor Housings interchange with HX40 (modification)

Exhaust housings: 9cm WG, 12cm WG, 14cm NG, 18cm NG, 22cm (?)


HX40 60mm inducer. multiple compressor wheels
Compressor Housings interchange with_____

Exhaust Housings: 14cm WG

HX50 63 and 67mm inducers
Compressor Housings interchange with_____

Exhaust housings can interchange with an HX40, need modified. 17cm WG is the smallest OE.

HX55 67mm inducer

exhaust housings: 20cm _____

HT3B 76mm inducer multiple wheels

Exhaust housings. 20cm NG, 22cm NG, 26cm NG, 28cm NG, 32cm NG

HT60 76mm inducer
(supersedes HT3B)

Exhaust housings. same as HT3B, possibly interchange

HX60 83mm

No info.

This is all from my memory, add or correct as possible.
 
I know we run HT80's on our vehicles at work. I have no specs but if I can run them down I will post them.
 
HX35 are 8 blade 56mm on the pre 98.5 models. On 98.5-2002 they are 7 blade 54mm.
 
there are also WAY more compressor wheels for the HX40 than the 60mm... there are HX40 comp wheels that are smaller than 56mm, and if you can show me a 14cm HX40 turbine housing, I'll kiss your ass
 
I don't have a pic of the 14cm housing for the HX-40 but I had one a few years back, I believe it had come from Bill Robbins.
 
Piers took a gated 14cm housing for a 35 and machined it for a 40, runs that with a 3B on his 12V 78 Ford.

Jim
 
HT3B's have different size compressors too, I know mine has a 74mm and I have seen 77mm.
 
WUnderwood said:
do you care about the rotation of the compressor wheel? HX vs HT?
Click to expand...

I doesn't matter except for the interchange.

Forrest Nearing said:
there are also WAY more compressor wheels for the HX40 than the 60mm... there are HX40 comp wheels that are smaller than 56mm, and if you can show me a 14cm HX40 turbine housing, I'll kiss your ass
Click to expand...

Maybe it was 16cm? We do need a full list of hx40 wheels, although I don't see why you would want them.
 
Forrest Nearing said:
there are also WAY more compressor wheels for the HX40 than the 60mm... there are HX40 comp wheels that are smaller than 56mm, and if you can show me a 14cm HX40 turbine housing, I'll kiss your ass
Click to expand...

x2.

There was also mention of turbine wheels either, which can vary as well.

Jim Fulmer said:
Piers took a gated 14cm housing for a 35 and machined it for a 40, runs that with a 3B on his 12V 78 Ford.

Jim
Click to expand...

I've thought about trying this, haven't had a need to yet though.
 
Truck No Run! said:
I doesn't matter except for the interchange.



Maybe it was 16cm? We do need a full list of hx40 wheels, although I don't see why you would want them.
Click to expand...

Because there is a 56mm billet comp wheel that will out flow and spool way faster than a 60mm comp wheel. :poke:
 
Also HX50 can be with 17cm non-wastegate houssing.

HX50 exhaust housing can machine to fit to HX55. (turbine exducer is bigger)

I made this conversion and I run HX55 with 17 housing, ( very laggy and will hit very hard when lites)


Hx35 can be with 16cm nonWG housing
 
Truck No Run! said:
Trying to gather info on all the Holset models for sizing and interchange reasons. (for the triples). Any info or part numbers you can contribute will be appreciated.

WG:Waste Gated
NG: No Internal Waste Gate

Refer to this thread for flow rates: http://competitiondiesel.com/forums/showthread.php?t=2577

HX35 56mm inducer.
Compressor Housings interchange with HX40 (modification)

Exhaust housings: 9cm WG, 12cm WG, 14cm NG, 18cm NG, 22cm (?)


HX40 60mm inducer. multiple compressor wheels
Compressor Housings interchange with_____

Exhaust Housings: 14cm WG

HX50 63 and 67mm inducers
Compressor Housings interchange with_____

Exhaust housings can interchange with an HX40, need modified. 17cm WG is the smallest OE.

HX55 67mm inducer

exhaust housings: 20cm _____22cm

HT3B 76mm inducer multiple wheels

Exhaust housings. 20cm NG, 22cm NG, 26cm NG, 28cm NG, 32cm NG

HT60 76mm inducer
(supersedes HT3B)

Exhaust housings. same as HT3B, possibly interchange

HX60 83mm

No info.

This is all from my memory, add or correct as possible.
Click to expand...

See red lettering
 
HX50 housings - 17, 19, 22, and 25 all NG.

HX60 housings - 25, 27, 32, and 36 all NG.

Not sure on WG housing options for these.
 
HX55's can be had with a 65/98mm compressor wheel. Exhaust wheel is a 87/77mm wheel. 22cm factory housing, an s400 housing can be machined to fit.
 
Here are some interesting facts directly from Holset engineering, the 67mm billet compressor wheel in the HX52 flows up to 1200 cfm and the 71mm compressor wheel found in the PRO52 and most HX55s flows up to 1450 cfm.
 
Last edited:
Thanks.

I'm starting to think Holsets are very under rated.

What applications used HX52 ?
 
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