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HX35 question

6.5L

6.5L

Old Iron Runner
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Location
Northwest Wyoming
Did they make a lot of different HX35's? I keep reading online that they are like 56-58mm inducers. If I recall correctly, mine measured 54mm. Is there anywhere I can type in the serial number on the compressor housing and get some more information?
 
That question I cannot answer explicitly. Only thing I can do is measure the one I have. Where are you measuring exactly?
 
Holset has a site... it should work for ya...

The BAE site also has specs for all the stuff also...

There are many HX numbers that can be made into different configurations .....
 
Yes, there are at least 3 different compressor wheels, I have them here, 6/7/8 blade units. I wrote down their sizes somewhere. Count your blades.
 
Ok, so I am bringing this thread back up. I finally got off my lazy butt and did some digging. According to Holset part numbers, my turbocharger was off a 1999 Cummins with an Automatic, rated at 215hp. It is a 7 blade unit. Some of the places say it is suppose to be a 56mm inducer, but when I measured, I could have swore it only came up around 53-54mm. Am I missing something? Also attached a link to a page I found. Assembly # is 3590104. Serial Number is c01057955 (not sure if "c" is suppose to be in there?)

View attachment 40285
 
They didn't really list sizes under compressor wheels. Just said OE replacement. But I did look under upgrades. Shows I can get a choice of compressor wheels with housings for about $250. I may just have to do that. I thought all Cummins came with a 56mm inducer. Maybe I was wrong. Shows I can get a 60mm inducer with a 86mm exducer OR a 62mm inducer with 86mm exducer. Which would anybody recommend. Comes with polished compressor housing as well ( no other choice but sweet ). I was thinking the 60mm inducer and 86mm exducer would be nice. Wouldn't that basically make it a HX40 compressor side with a HX35 turbine side? So a Hybrid? I'd like to keep the 12cm housing.
 
If you look at the 60/86 HX 35 wheel, look at the "more info" tab, they list all the specs for it... not on all part # as you said..

And no, it isn't the same wheel spec wise as the 40 comp wheel..different tip height so different cover needed to fit 40 blade..
 
The 60mm wheel kit comes with a new cover for it but I think the back plate for the center section would need to be modded since mine right now isn't an 86mm exducer. That's what they said on the site.
 
Even though the 7 blade is smaller, it actually flows more from what I've read. The 60mm wheel is Super HX40 wheel, the HE351 is 58.5mm. As you can see in my sig, I have a factory billet 56mm 6 blade wheel with its matching cover and it made a big difference over the 7 blade 53mm wheel I had earlier. It made boost faster and more of it, way more under the curve. My next upgrade is the HE351 wheel then the 60mm wheel. A decent turbo shop can machine your cover, saving money. My local shop charges around $80 to machine, the wheel cost me $40 IIRC.

Oh, and the back cover, I took a squared off die grinder bit and carefully machined it out, it doesn't need to be perfect.

pics083_zps4975d5ff.jpg

Picture121_zpsc226682f.jpg
 
Is there any way I can put a larger compressor wheel on then and not have to do any machining? or is that completely out of the question? You said it is small but flows more? Compared to what?

And as far as "grinding it out", wouldn't that be pretty hard since the back of the plate is curved to match the compressor wheel? Or Maybe I am just lost at what you are saying
 
6.5L said:
Is there any way I can put a larger compressor wheel on then and not have to do any machining? or is that completely out of the question? You said it is small but flows more? Compared to what?

And as far as "grinding it out", wouldn't that be pretty hard since the back of the plate is curved to match the compressor wheel? Or Maybe I am just lost at what you are saying
Click to expand...

No, the compressor housing has to match the wheel, otherwise the wheel will self machine itself, NOT good or it won't fit correctly and it will be very inefficient.

The 7 blade is smaller than the 8 blade, mm wise, but flows more lbs/hr than the 8 blade. The 6 blade out flows them both, then of course, the HE351 and Super HX40 wheels outflow them all.

The backing plate is flat, but its stepped where the wheel resides, hit up ebay and look at housings, you'll see what I mean. You simply need to make the circle larger for the larger exducer wheel. Its really simple, took me 5 mins with a die grinder.

See the blue box? Far right is the bit I used.

https://www.google.com/search?q=die...2Fpowertoolsa.co.za%2FACCESSORIES.htm;277;320
 
I'm not worried about the compressor housing. The upgrade kit I was looking at comes with a compressor housing to fit with the compressor wheel. it is the backplate I was wondering about. Another question I had, and I emailed BAE about this, was weather the new compressor housing will fit my HX35w. I found the upgrade kits under the HX35w section, and in the title of the upgrade kits, it lists the HX35w, but under fitment it says HX40. So I don't know. Hopefully they email back sometime today. But it is gonna have to wait. Probably gonna have to rebuild my NV4500 soon. 4th has been starting to go for a while now. Tranny has 407,000+ miles on it, all original. I think some synchros are going out. Plus while we have it apart, might as well rebuild the whole thing.
 
HX35 and HX40 use the same shaft diameter and bearing housing's, so it all interchanges, with some minor work, as mentioned earlier.
 
So I also did some digging around. You said the wheel was a Super 40 wheel so I did find a compressor map for a Super40 and did some calculating. Going by a formula I found online (probably wrong) I calculated roughly a 55lb/min airflow need for my engine at 3500rpm and 18psi. Going by the map for the Super 40 at a pressure ratio of 2.25, it does fall within a very good area of the map. I think I would be happy going with that wheel if I ever do so.
 
6.5L said:
So it will fit as long as I just modify it to accept the 86mm exducer on the backplate?
Click to expand...

Correct. If the turbo you have has a 12 point nut holding the compressor wheel on, you can simply swap wheels with no balancing issues. If it has a 6 point nut, then it has to be balanced as a unit.

6.5L said:
So I also did some digging around. You said the wheel was a Super 40 wheel so I did find a compressor map for a Super40 and did some calculating. Going by a formula I found online (probably wrong) I calculated roughly a 55lb/min airflow need for my engine at 3500rpm and 18psi. Going by the map for the Super 40 at a pressure ratio of 2.25, it does fall within a very good area of the map. I think I would be happy going with that wheel if I ever do so.
Click to expand...

That wheel will be awesome. I can't wait to try one out.
 
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