CamB

Holset compressor wheel

4 posts in this topic

So a pretty niche question, but here goes.

I have an excavator-spec HX35. The good is that it has a non-WG 12cm divided turbine housing. The bad is that it has a 46/83mm (thats 30 trim...) coldside. I have aspirations of more power than that (M10B20, built accordingly).

The compressor wheel looks like this:

99d5c5ce31d0a18342a6b642f1c94a39.jpg
So what I have found at some stage in the past is a 50/78mm wheel and housing. This was a great setup in my head until I found out the one I had was 83mm exducer (I expected 78mm). So when I put the smaller wheel on it looks like this (note the gap between the edge of the wheel and the start of the backplate):
121bfce729c76715d586e71de95af0fe.jpg
So the question is ... will that affect performance? Or am I better to go hunting for a 83mm solution, either with a matching housing (some HX35, some HX40 fit the bill in 54mm or 56mm) or possibly find a 54/83mm (54mm-ish) wheel and get one of the housings I have machined to suit by crunchy? Anyone else an expert on these things?

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No idea. But you know the man who will know. :)

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No idea. But you know the man who will know. :)

I do - I hope he sees the thread.

Had another look - having taken off the silencing ring on the 50mm inducer compressor housing I have, I can see machining out to 54mm (or possibly even 56mm) is looking pretty feasible. In the 2nd pic the tape is 57mm in diameter.

0528123c3e38a4780d92a79924c1c70e.jpg

8b68066379dce28dfa1242881ff3d192.jpg

Edited by CamB
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Speak with Steve Murch, Cam

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