And I believe that hx30 map to be accurate, that is the exact format in which Holset releases their maps, the top flow conversion is lb/min, the lower is kg/s k/MPA

remember these turbos were designed for diesel apps so they actually move quite a lot of air at smaller wheel sizes given design factors, an hx35 has similar maxmium flow numbers but if you look at the maps, the hx35/hx40/he351ve(ce) map is much broader towards the surge line vs how narrow the hx30 map is, especially around the 3.2PR 34-35lb/min point, the map gets very narrow around that point but it will still flow well

I'll try to map my motor on the HX30 map to show you

 

JESUS! I figured any turbo specialty shop would be able to do some sort of compressor map. I will shoot him a pm. I know you, him and a couple others such as turbo-ls, lightingteg,ect. know your stuff, but there has be hesitation to send a pm because I know y'all get tired of people asking stuff. But If he has a map I'd love to see it.

 

now you know why name brand (except Precision, they've flat out said they will never have compressor maps made)turbos cost a good bit of money, a lot of R&D and man hours go into every unit. Hell even TheShodan is having compressor maps made

it takes a very specialized, very expensive piece of equipment to build a compressor map... and it takes up the space of a small home.. and the resources to do the test are expensive as well.

TheShodan can explain more about the test rig that does these maps and the intense calculations behind them, not to mention the torture test the turbo being used to make the map goes through.

I posted a white paper on the compressor map generation process awhile back, I'll see if I can find it

 

I agree the map looks like the official Holset maps, however the HX30E nomenclature on that sheet I think is misleading, the flow numbers on there match up closer to the HX35 variants that feature much larger inducers and larger exducers as well.

When I was doing tons of Holset usage research I remember this very point being discussed on one of the formums (possibly DSMtuners which is the holy grail of Holset performance use info)

Not saying it isn't correct, but based on confirmed info I have on other models in the line-up, the flow numbers vs the size of the HX30 compressor don't "fit"

 

it doesn't really fit that well but keep in mind that Holset uses a funky way of determining mass flow, so can't look at their maps like you would one from Garrett or other companies.

Also, we don't know what the last 6 digits of the part number correspond to as far as the exact HX30 variation but they didn't make a lot of them like they did the H1C/E and the Hx35/40 models.

I would bet that map is "close enough" for every HX30 they make... also keep in mind the Holset turbine wheel is very efficient as it was deigned for use on diesels with slow, cold exhaust gasses, granted diesels do produce larger exhaust gas volumes for a given engine displacement vs. a similar gasoline engine

 

Have an hx35 7 blade for sale. Will post pictures tomorrow. Was pulled off a piece of a komatsu equipment with 40 hours on it. In perfect condition, no shaft play in or out or up and down. $350 shipped.

 

Hi guys, new on here. Was reading this thread whole day, but very little info on HX30...

I want to boost my B18C4 GSR engine with a skunk2 pro inlet mani to around 300-350WHP.
I want it to fully spool to around 4k rpm or before and I probably wouldn't want to run much more than 15psi. Is this possible with holset or should I just get a Garrett GT2871/2876?

 

Yes it is possible

 

From what I've read so far the you get the quickest spool time from a HY35? I'm looking to boost my B20vtec and make around 300 around 12psi. Does that sound possible? Also what manifold is everyone running with these turbos, just anything with a T3 flange(other than ssac haha)? This is my first turbo build so I just want everything to go smoothly. Thanks in advance!

 

Correct the HY35 should spool the quickest.
I should have mine up and running withing a month or so.
Hy should be good for quick spool if you have the 9cm housing.

 

What vehicle did you pull the turbo off of? Also what manifold are you using?

 

The hy35 comes off the 01 dodge ram turbo diesel automatics.

 

Whats a good manifold to run with the HY35? I saw some people having clearance issues with the block. I was thinking of running a spooling performance log kits with a 3in. Dp

 

My new drain...ported right out to edge of opening in chra

 

Where u buy that drain fitting? Nice!

 

Shhhh....made in USA

 

Is there a t4 housing for the H1c?

 

no they were only produced in a t3 configuration. Holset never intended the turbo for a housing that large, as indicated by turbine wheel size. it simply wouldn't be a good match or serve a purpose, as the t3 housings will flow enough exhaust gas to choke the turbine wheel, a larger housing wouldn't change that fact.

you might be able to have one custom machined. I know a guy on eBay takes standard Garrett T31 4 bolt turbine housings and machined them to fit Holset turbines. he might be able to find a t4 housing he could machine to fit but again it wouldn't do anything but make the turbo respond slower, you wouldn't see a power increase.

if your current manifold is t4 flanged, I suggest using a 1/2" adapter flange to fit the existing t3 turbine housing

 

should have some numbers tomorrow to add from my lsv with an hx35. curious to seee what it puts down!

 

Is there a site that sells Holset turbos? Can't seem to find any.

 

ebay/craigslist is your best bet, but dont expect to find any cheap ones anymore. people have learned what they are worth

 

Has anyone tested the bae 6286 wheel for the h1c/e hx series? Looks interesting. I want to compete in fis this year and want to be as close to the 62mm limit as I can.

 

it wouldn't be a good match for an h1c given its turbine wheel size and lack of a ported shroud housing.

 

The it come wheel and comp housing. What about a diff turbine wheel how much would that help? Or what would be a good turbine size.

 

there's no point in swapping that stuff out just to run a different compressor wheel, the money invested would be a waste and it wouldn't do what you want it to.

before I'd even consider the h1c and swapping everything out I'd have TheShodan build a custom, purpose built turbo before I went through all of that. the cost difference would be negligible and you'd have a turbo that does exactly what you want it to instead of cobbling a Holset together just to get by