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Turbo System Tech: 4G63 turbos, Intercooling, Boost Control, Wastegates, etc.

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Old 06-26-2012, 10:34 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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2G-specific

Holset WH1C capable


so i been looking on youtube and other places but anybody have any feedback as far as how the spool characteristics are and how much power can a 2.0 dsm make out of one??

thanks guys

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Old 06-26-2012, 11:00 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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Its basically the same as a regular hx35 8 blade just with the benefits of having a t bolt clamp holding the compressor cover making it easier for rotating/install.


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Old 06-26-2012, 11:18 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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Holset Turbos, FAQ

Quote:
Originally Posted by Holset FAQ
H1C/WH1C:

In 1994, there was the Wh1c which has pretty much the identical compressor as the hx35 but with a Vband compressor cover. The turbine wheel is the same. It will bolt into the BEP bolton hx35 turbine housing. It has 4 bolts at the housing instead of 6. So you will need to buy 2 more bolts and use 6 washers cut to make a flat side. Honestly, I just used bolts that were cut a little short and the bolt head was wide enough to pull the chra to the turbine housing. No sealing issues. Since the Wh1c is for all practical purposes an 8blade hx35 the spool and flow is the same too.

I have the big h1c. It comes on the INTERCOOLED 1991-1993 cummins pickups. It has the webbing for MWE but no groove cut like the hx35/wh1c has. This turbo I term the big h1c because it has a 54mm compressor inducer and same exducer than the 8blade hx35/Wh1c. The other h1c is the small h1c found on the NON-intercooled cummins pickups. This has a 50mm inducer but only 7blades and has no webbing for MWE. Less blades helps flow, but so does a larger inducer diameter. The most whp ever recorded on a gas 4cylinder with the small h1c was done on a KA24 nissan: 411whp. Since the big h1c has a 4mm larger inducer and the same turbine wheel as the hx35, it is safe to say that it flows enough for between 411whp and 500whp. The diesel sources state that it flows SLIGHTLY less than the early hx35. So 4lb/min less than the 8blade hx35 puts the flow of the big h1c at 48-49lb/min right where a 50-trim or 20g is. The small bep housing is all that's needed to get the most from the compressor and the spool speed is 20+psi by 3500rpms


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Old 06-26-2012, 11:25 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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Wow, dude......u even posted this question in the same section as the holset faq??? Peoples laziness amazes me....

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