H1C/H1E Hybrid... Lets Call it the H1D...
 

Just a quick over view of what goes into making a holset hybrid turbo. Luckly Holset uses 4 8mm bolts on the rear of alot of the backing plates for the compressors allowing you to simply swap them. So grab a beer and hang on!

Here is the H1E turbo
Attachment 56834

Start by removing the V-Band Clamp that holds the compressor housing on...
Attachment 56835

Then pull it off revealing the compressor wheel
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Next I removed teh 4 bolts holding on the exhaust housing...
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The housing does not bolt to teh center section, there are two clamps that hold it. this allows you to clock the center section so the oil flow is correct for you application.
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If you are not working with a new turbo you might have to persuade the exhaust housing off... Thsi might be as easy as a few light taps with a deadblow hammer to a last resort of breaking out a torch, if you do this you run a REAL high risk of baking the seals and having to rebuild the turbo.
Attachment 56839

Now we can take off the compressor wheel... these a left hand thread... that mean you turn the not clockwise to remove it. on the H1E the compressor and exhaust nuts are 12 point and on my stock 89 H1C the nut on the exhaust is 12 and the compressor is 6. This will be very important when you reassemble it you need to torque teh nut to 150 in. lb. if it's a 6-point nut, 135 in. lb. if it's a 12-point nut. After removing the wheel you can pull teh exhaust wheel and shaft out as one piece
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After the shaft is out of the way we can start taking off the backing plate. Here are the 4 bolts I was just talking about that makes this swap pretty easy.
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After removing them the backing plate comes right off! and you are left with this...
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Do the same steps to the H1C then reverse it to put the compressor wheel, backing plate, and compressor housing off the H1E onto the H1C.

And this is what you get... Looks like I'm gonna need a custom cross over pipe!
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Whats the size of the compressor on the H1E? Also what size exhaust housing are you running on it?

Excellent !!

18cm housing
Compressor inducer: 58.05mm
Compressor exducer: 81.57mm

Just got word from my machinest that the new flange for the intake is done. Good timing too because the sylicone boots should be here tommorow and I will be able to button this thing up! Only went with 2.5" tubing for the intake. We tried 3" but the bender crimped it way to much. Will flow more than stock and I have some other things up my sleave for latter.

Hey rswords, do you think the compressor from a H1E would fit a hx-35? or is there some problems? I can probably get ahold of a H1E pretty easy and i have My old H1C at the farm on the shelf. Maybe i could use the H1C middle the hx-35 hot side and the H1E compressor?! Did i just answer my own question? Help me straighten this all out! Thanks
ez

i think u r gonna have trouble mixing h and hx series parts. hx35 with an hx40 compressor wheel and housing work well

hhhmmmm... Not sure. I think I would do the HX40. The only reason I am even messing with this thing is the H1E was Free and no one realy has done a whole lot with them. Only found one other person that was made teh H1C/H1E hybrid. Just trying new things. Never know might be a bust of could be the new hot thing! If you want to see what all will work start taking things apart! :D Wont ever know if yuo dont try!

what are you trying to accomplish doing this hybrid? Sorry I am not a turbo expert and was just wondering what benefits this "may" acomplish.

thx


nice write up by the way:rocking: