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Discussion Starter · #1 ·
OK...I'm starting the build for my 86 GLHS and I think I want to go with a holeset. Lets assume we are going forged pistons, HD T2 rods, 3bar, Stage 5 ECU, AFPR, ported head w/+1mm, ported 2 piece intake, ported exhaust, all ARP with a big enough FMIC.

Obviously the OEM T2 wont be able to fill this engine w/the amount of air it would be capable of breathing but I also don't want a low end pig either because I put too big a turbo on it that only builds big power after considerable lag and more RPMs build.

What are the options for a Holset that would support something in the 300-400 HP (at the crank I guess) range?

Is it pretty much a bolt on opperation or any fabrication needed?

I've seen a number of versions mentioned here such as the HE351CW.

Remember it's going in an L-body (Omni) it's kinda tight back there at the firewall.....
 

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HY35

Smaller turbine housing, so it should fit easier. Spools faster than an HX35 because the hot side is smaller. Will flow plenty for 300-400HP, and will also move the spool lower in the rev-range if you don't want a 'pig'. With all the porting you describe, it should run just fine.

Bigger cam would likely work well in that setup also.
 

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Discussion Starter · #4 · (Edited)
Some more common versions and their specs:


HX35- By far the most popular. It seems to be the cheapest and easiest to find (which is likely a big factor in its popularity). It comes in the 8-blade (older) and 7-blade (newer) varieties. The larger exducer of the 8-blade will help it to spool faster, which is definitely a good thing with the A/R of the HX35.

HY35- It uses the HX35 7-blade compressor with a smaller turbine and A/R. Less power potential but better spool time.

HE351- The big dollar one of the bunch, but for the money it is (at least on paper) a good turbo. It uses the same quick-spooling turbine and A/R from the HY35, but a larger compressor wheel (although it maintains the same trim). In theory, it should spool quick and pull HARD. I guess the price is higher and there aren't as many of them, so that's why I haven't seen too many others.

I also found that specs for these turbos are particularly difficult to come by, so I thought I would post those all in one place as well.

HX35 8-blade:
A/R- 0.89
Compressor inducer- 56mm
Compressor exducer- 83mm
Compressor trim- 46
Turbine inducer- 69.5mm
Turbine exducer- 60mm
Turbine trim- 75

HX35 7-blade:
A/R- 0.89
Compressor inducer- 56mm
Compressor exducer- 76mm
Compressor trim- 54
Turbine inducer- 69.5mm
Turbine exducer- 60mm
Turbine trim- 75

HY35:
A/R- 0.65
Compressor inducer- 56mm
Compressor exducer- 76mm
Compressor trim- 54
Turbine inducer- 65mm
Turbine exducer- 58mm
Turbine trim- 80

HE351:
A/R- 0.65
Compressor inducer- 60mm
Compressor exducer- 84.582mm
Compressor trim- 54
Turbine inducer- 65mm
Turbine exducer- 58mm
Turbine trim- 80

HE341:
HY35 and HE341 are identical (some people often mistake one for the other). They use the same compressor and turbine wheels and would perform in a very similar fashion. The only differences I know of are in the housing. The HY35's exhaust discharge differs from the HE341 and the HE341 has a different wastegate. This is a non-vgt turbo

CREDIT THREAD:
Holset Turbo Specs. HY, HX, H1C/WH1C, H1E/WH1E - D-series.org

Holset HX30

The HX30 is suitable for engines of up to 5 litres capacity requiring up to 0.35kg/s of air at 3.0:1.

Aimed at medium duty applications, the HX30 is a well proven turbocharger on many 4 cylinder automotive, bus, agricultural and industrial applications.

Features:

Choice of turbine housing materials to cover a wide range of temperatures.
Compressor and turbine wheels selected for optimum airflow,efficiency and pressure ratio.
Fully adjustable compressor and turbine housing orientation.
Fully floating twin hydrodynamic journal bearings.
High efficiency compressors with broad operating ranges.
High pressure ratio capability.
Symmetrical twin flow turbine housings.
Superback compressor wheels for extended life and durability at high turbo speeds.
Variety of compressor and turbine housing flanges available.
MWE (Map Width Enhancement)compressor inlet. (Optional)
Sound suppression baffles. (Optional)
Watercooled bearing housings. (Optional)

Dimensions Holset HX30
Length mm 222
Width mm 217
Height mm 154
Smallest Mass kg 8
Largest Mass kg 10
Airflow kg/s 0.35
For Engine Capacity (litres) Up to 5
Output Range (hp) 90-240

Pictured here is an HX30 from a few different angles
 

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Discussion Starter · #5 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html

HX35:

The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

The 7blade hx35 has a 56mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEAM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.
 

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Discussion Starter · #6 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html

HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.
 

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Discussion Starter · #7 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html


HX35-40 hybrid:

Keeping the long tradition of the marriage of sportcompact and hybrid turbos, there is the hx35 turbine and the hx40 compressor. It is strongly recommended to use the large bep turbine housing or the stock hx35 turbine housing with an non-divided t3 manifold for this turbo. The small bep housing around a t31 size hx35 turbine wheel is probably not enough to merit any of the hx40 compressor wheel upgrades. 20+ psi by 4000rpms can be seen in the hx35/40 with the hx35 12cm^2 turbine housing with a non-divided t3 manifold. With the large bep housing, spool times are to be determined. But likely similar.
 

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Discussion Starter · #8 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html


HX40:

The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.
 

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Discussion Starter · #9 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html


H1E/WH1E:

The Wh1e is like it's little brother the Wh1c. It mirrors the hx40 8blade in every way except that it has a v-band compressor cover and a 4bolt chra-turbinehousing pattern. It will consequently bolt into the hx40 bep bolton turbine housing and this is plenty of flow to max out its 60lb/min compressor.

The h1e is like it's little brother the h1c. There are different size compressors. . . BUT there are also different size turbine wheels too. Check measurements before buying this turbo if you plan on running a BEP turbine housing. There are lower flowing compressors than the 58mm 8blade that are out there. So this turbo may not flow any more than an hx35 if get the wrong one. You need at least a 58mm compressor inducer for this to be a worthwhile turbo vs the proven hx35 or 8blade hx40.
 

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Discussion Starter · #10 ·
CREDIT THREAD:
http://www.d-series.org/forums/forc...lset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html


HX52:

This is a big sucker. It is commonly found on the Volvo Semis and usually has a billet compressor wheel. It flows 88lb/min. There is no bolt on housing for it. If you want a bolton housing for this turbo, then you don't want this turbo. In fact if you want a t3 flange turbine housing for this turbo, then you don't want this turbo. You DO want this turbo if you're looking at a gt4294r or gt4202r. The turbine inlet is slightly different than a t4 bolt pattern. You can still get the t4 manifold to work just fine by enlarging the bolt holes.
 

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Discussion Starter · #11 ·
Here are some external comparison pictures between the HX and HY35.

That comparison picture is still the 7blade vs 7blade bro - both are the later versions 7blade (99-02 cummins manual hx35w, automatics hy35)

Where to buy: ebay, craigslist, deiseltruckresource.com, cumminsforum.com, dsmtuners.com
 

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HY35 and HE341 for 400 WHP and faster spool, the next jump up is the HE351 for 500 WHP. Both have been known to push past these figures. They have a non divided 9cm turbine needed for 4 bangers. Boostgeek runs huge ports and a huge cam with a 12cm Holset, HX35 by the looks of it.

By design the HE341 should make for a raging street turbo, faster spool and big flow. I've seen 541 WHP from a stock turbo 05 truck, so a gas engine and a HE351 should be for making big HP numbers. Hasn't happened yet but my guess is SHADOWs Charger with HE351 will be in the 9s next year. That turbo is amazing, but too many talk of it now and I can't afford one for my truck :mad:
 
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would also add that a H1C / HX30 can be made to 60 trim and ported housing for $225 and another $65 to polish it lol. A lot is done with them.
 

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saved both PDF and stuck the thread, can you edit the post and add HE341 specs?
 
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