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Thanks Hinton!! That is the component everyone who wants a bolt on HX35 needs. Are they actually available though? Show's price as 0 on the website I checked, assuming that means not in stock or not in production?
Edit: Available and in stock here for 228 + free shipping!
Can anyone who has a turbo laying around with a stage 5 wheel, can you measure the height? The stage 5 wheel has a 62.35mm exducer and a 68.00mm inducer.
The HX35 turbine is 58mm exducer, 70mm inducer, and 11mm tip height. So long as the height isn't a problem, it looks like the HX35 turbine will pretty much drop into a stage 5 hotside. I don't think a 2mm larger inducer is going to be a problem. We're talking ~ 17 hundreths on the exducer and just 78 thousands of a difference on the inducer.
edit: Stage 5 tip height appears to be 10.3mm. A 28 thousandths increase in tip height with the holset turbine could prove problematic.
edit: I measured my 7 blade HX35 and the turbine is actually 60mm/69mm with a 53.65/77 compressor.
Can anyone who has a turbo laying around with a stage 5 wheel, can you measure the height? The stage 5 wheel has a 62.35mm exducer and a 68.00mm inducer.
The HX35 turbine is 58mm exducer, 70mm inducer, and 11mm tip height. So long as the height isn't a problem, it looks like the HX35 turbine will pretty much drop into a stage 5 hotside. I don't think a 2mm larger inducer is going to be a problem. We're talking ~ 17 hundreths on the exducer and just 78 thousands of a difference on the inducer.
edit: Stage 5 tip height appears to be 10.3mm. A 28 thousandths increase in tip height with the holset turbine could prove problematic.
Did you check the stage 3 housing? I know I have seen a thread somewhere with specifics and pictures of what needs to be done. It did require some slight machining on the turbine outlet, which I believe they simply did with a Dremel. I'm trying to track it down.
Did you check the stage 3 housing? I know I have seen a thread somewhere with specifics and pictures of what needs to be done. It did require some slight machining on the turbine outlet, which I believe they simply did with a Dremel. I'm trying to track it down.
I had an orginal turbonetics replica #8 housing/stage 3. I sold it because no one would touch it, it needed a LOT of machining. It wasn't even close in any dimension, as the stage 3 wheel is MUCH smaller. The stage 3 housing is not useful here. The stage 5 housing is the answer, that is the housing Sid used on what I believe was the world's first HX35 install on a 951.
quoted directly from Sid:
"The proper way to go about it is to use the whole Holset minus the turbine housing. You cannot use the HY variety though.
You can use a kkk replica housing and use the hx 35 turbine wheel. It requires slight machining of the exducer (small side) of the turbine opening and slightly reducing the od of the center section of the turbo where it slides into the t- housing .
All of this can be done with a dremel and a DA sander.
I havnt tried to use a factory kkk hot side yet. It's been awhile since I've messed with it.
The real benefit in addition to the turbine wheel design is the durability of the thrust bearings.
Or you can easily change the flange and use a t3 housing. We used a .63 on daves and that thing spooled very quick!!!"
and later from the same thread: "I couldn't tell you off hand what the 8cm hot side difference is but iirc the wheel is much smaller. The t3 housing you need is for a stg 5 wheel."
As far as reducing the OD of the holset CHRA to fit the garrett sized hotside (the replica housings are made for garrett CHRA's for anyone reading this in the future); I assume Sid meant this area I circled in red here. I wonder how to turn that diameter down using a sander or dremel without rendering it out of round?
And likewise here: I wonder how you'd know when you've taken enough off? There must be a room temperature clearance spec between housing and turbine blade so we would know when to stop grinding/sanding the exducer portion of the housing?
Well maybe this thread can serve as the definitive resource moving forward. That is if we can figure it out! Thanks for all the great info thus far. If it can be done without reinventing the wheel it seems like a lot of performance potential for about half the price of a super series, precision etc.
My kkk hotside ended up being too damaged to use, when I source another one I'll continue moving forward. This has been on the back burner, behind other work on the 951.
Some more info; the Holset CHRA measures 82.00mm OD where it meets the hotside. Can anyone measure a garrett or super series ect CHRA or just the ID of opening of the hotside where the CHRA would meet it?
is there supposed to be any additional clearance for the minor? When are you pulling the trigger?
I dont believe so. The turbine wheel should physically fit so long as the extra 1.29mm blade height and 2mm larger inducer of the holset turbine doesnt prove to be an issue.
The numbers I stated where just to physically fit the CHRA to the hotside. I probably will pull the trigger on this, but I'm not sure when. The numbers seem to all be there though and we have confirmation from Sid that this does work, so with time I plan to document it and get the word out.
I dont believe so. The turbine wheel should physically fit so long as the extra 1.29mm blade height and 2mm larger inducer of the holset turbine doesnt prove to be an issue.
The numbers I stated where just to physically fit the CHRA to the hotside. I probably will pull the trigger on this, but I'm not sure when. The numbers seem to all be there though and we have confirmation from Sid that this does work, so with time I plan to document it and get the word out.
nice! My engine is at the machine shop right now, going the 2.85 hybrid stroker route. Thinking this could be a pretty solid setup.
Strike out. Seems that website was wrong, the repro hotsides are not available anywhere. I called THmotorsports, lindsey racing, and turbonetics themselves.
Strike out. Seems that website was wrong, the repro hotsides are not available anywhere. I called THmotorsports, lindsey racing, and turbonetics themselves.
Well there goes that plan. Thanks for doing the research!
The Precision K26 hot housings are available but are .82A/R and would best suite a larger than 2.5 turbo build. They would also need to be machined but should fit just fine. There is also plenty of room in the casting to go with a bigger turbine if so desired.
09-07-2016, 09:59 PM
