As there seem to be some interest in these humble beasts, here is few photos of my shelf.
In the pictures are featured HX35 and HX40 (#20 exthousing) You also see the modification to oil input, suggest that mod to all turbos, easyes installation and maintenance. There is also few pictures of the #18 exthousing.
One thing I like to point out and make a simple point, if you look the shape of the exhaust housing it is wide as h*ll, compare that to the normal "garret" type housing, they are taller and narrower. When you compare A/R ratios as they are ratios of volume of the housing and radius of the exhaust wheel +housing radius.
http://holsetit.nosturi.net/holset-10.jpg
http://holsetit.nosturi.net/holset-11.jpg
http://holsetit.nosturi.net/holset-12.jpg
http://holsetit.nosturi.net/holset-13.jpg
http://holsetit.nosturi.net/holset-14.jpg
And If you bothered to read this far, the point being: as the turbo is "centrifugal force" trusting device, what is better to have lot of wing surface area to the tips of the wings or middle of the wings? Think that and gives an input
(disclaimer: I'm NOT an expert, just one enthustiast and I'm just telling what i THINk)
In the pictures are featured HX35 and HX40 (#20 exthousing) You also see the modification to oil input, suggest that mod to all turbos, easyes installation and maintenance. There is also few pictures of the #18 exthousing.
One thing I like to point out and make a simple point, if you look the shape of the exhaust housing it is wide as h*ll, compare that to the normal "garret" type housing, they are taller and narrower. When you compare A/R ratios as they are ratios of volume of the housing and radius of the exhaust wheel +housing radius.
The turbine housing A/R (area/radius) ratio is the area (A) of any turbine inlet scroll cross-section divided by the distance from the center of that cross-section to the center of the turbine shaft (R). For any given turbine housing, A and R vary in the same proportions, so all As divided by their corresponding Rs yield the same dividend--which is the A/R ratio.
http://holsetit.nosturi.net/holset-10.jpg
http://holsetit.nosturi.net/holset-11.jpg
http://holsetit.nosturi.net/holset-12.jpg
http://holsetit.nosturi.net/holset-13.jpg
http://holsetit.nosturi.net/holset-14.jpg
And If you bothered to read this far, the point being: as the turbo is "centrifugal force" trusting device, what is better to have lot of wing surface area to the tips of the wings or middle of the wings? Think that and gives an input
(disclaimer: I'm NOT an expert, just one enthustiast and I'm just telling what i THINk)
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