Thanks, I have never considered myself an artist.

One of the big things about job shop work is you really only get one shot at the machining ops. You miss your cut and you are hosed big time!

"one small error and its over" - Exactly right. (FAR to much of my life has been like that 🤪!)

I guess now you know at least one person does them that way. :-)

Sometimes something as little as a change in blade number can be 50hp.

Good hand eye coordination. :-)

Thanks!

Glad to have ya along!

Lots of practice at chasing the readout on the DRO!

Lots of practice. :-)

@@bcbloc02 do you ever take outside work? If so what's the best way to contact you to talk about my small project.

Not that difficult... I believe the center if the hole is the same outher diameter on both sides too

this sounds interesting.

Good hand eye coordination. :-)

Thanks!

Many times!

It has rained everyday for like the last 2 weeks it seems. Nothing but a muddy mess here.

Yeah. Can't let the modern guys have all the fun! :-)

Must be a lot of trial and error to that. Before I started tracing using the DRO I used to use modeling clay to check clearance.

Takes a couple hours to get it right, but I'm just working on my own junk so no rush. Compounds on a TDI, so little tiny 38 and 46 mm inducers.

Sweet! From time to time I consider building a compound setup for my Mercedes.

That would be cool! I am thinking that it is a 5 axis job at least, that would be a pretty major investment but hey you never know what might turn up!

Not usually. The turbos usually only operate for 20sec or less bursts so the water cooling doesn't do a lot for you. The BB turbos have been problematic. They were considered the best thing ever for awhile but I don't think that panned out like they hoped. Better materials and modifications to the oiling seem to have been better long term solutions than the BB's. The clearance is mostly dictated by the size of the wheel, the bigger the wheel the more the clearance. Sometimes the application makes a difference too as the wheels can really grown with heat so the harder you push one the more clearance it has to have so it doesn't grown into the cover. That is always a bad day when that happens!

That depends entirely on your setup but a gain of 50hp or more is fairly common.

Yeah i indicate the bore up inside as well as the outer ring back and face till I get it all running true to how it was originally machined before I ever start. I can't ever seem to get them perfect but usually within .005" or so. I think the castings distort with heat cycles.

That is a slot cut called a map width enhancement groove.

As I mentioned in the video I have an old video kzfaq.info/get/bejne/n8iVY9Njpre9k6M.html that I explain more about how I do the curves. Sadly because it is old the footage is not that great. Sometime when I do a bore that requires more obvious step cuts I will do an updated video showing it all again. The biggest improvement with this mod is the reduced likelyhood of wheel failure. Power increase is likely in the 50hp range on a 1000hp motor.

That is awesome to hear! It takes about an hour to map the bore for the numbers.

For someone with a tractor manufacturer in your name I find your comment ironically amusing. ;O

Barry Gerbracht one and a half ;)

Not sure what you mean?

Inspector asleep on the job again. Sometimes alter or even eliminate the map groove depending on rules and what the engine needs.

I like to spray them with slip plate it makes it nice and slick as it is a graphite impregnated paint. I don't know if it helps but I like to think it does.

Near Frankfort ky. Any. Increase in wheel size will of course have more lag. How much you need to increase it depends on how much you are increasing the air flow and the fuel.

Hard to say. I once sent off a cover to get extrude honed smooth inside and it actually lost hp.

I am not aware of anything impossible to break. The Hx60 is a pretty tough turbo but if you overspeed it it will go boom. The s400 Borg Warners are really tough turbos for the money.

1st time that day! :-)

bcbloc02 Yea take it you do few of those

Yes it went through the parts washer and air compressor before ever getting installed.

Central Ky. I mainly do Hx60's and larger.

Have you got a cover that matches the 66 wheel to copy the profile from?

Diesel injection balances the assembly for me. It is an HX60 76/113mm I believe. Customer provided wheel I just made it fit.

Yes, that is how I get paid. Unless it is one off stuff like this for racing usually whoever does the wheels can do the covers much cheaper than I. if you are needing something custom done send me an email what it is and i can give you a quote.

No rules on max pressure or speed. You can twist them as hard as you dare. The worst thing is the backwards rule thinking oftentimes does not allow aftercoolers or intercoolers so the air is super hot like 600-700degF outlet temps. The heat is a major killer.

So do you balance the assembly it makes a huge difference to there life

Afraid I don’t know. I have never even seen an hx30 in person. I would start by looking on eBay.

I have not fooled with any of that stuff. I mainly only deal in 75mm and up turbos.

The radius varies so it is a more complex operation than a radius attachment would produce, you would have to do a series of various radii to get the proper curve.

and you did this by hand? hollyyy shit

Yes but likely whoever you buy the wheel from could do it for cheaper.

Yes

No that was an HX60.

The bigger the wheel the more the lag yes. It doesn't matter for a racing application though.

Depends on the time it takes and how easy it is to setup. Typically $300-500

1mm

bcbloc02 I never realized they had that big of a gap in between the compressor housing and compressor. .040 is bit more than I was expecting. I guess they need it from the heat being cold to when they warm up im sure they grow a bit.

@@bcbloc02 how much would be too much clearance? and what kind of issues would come from having something with a bit more of a gap between the inducer and the compressor inlet?

Shawn Huetter too big a gap you loose boost and efficiency.

steve long $100/hr so it depends what you got and need.

Holset are known to have a bit looser wheel to housing gap, even brand new factory ones are like that

Find a friend with a 5-axis. :-)

Customer provided so I am not sure. You can buy various wheels from various sources ranging in price from $200 to $1000.

bcbloc02 thank, love the videos, especially the cummins swap in the one ton. Thanks again..dave

Glad you enjoy, be several 1st gen Cummins project videos coming in the future.

Depends on the size. Usually $200 that being said if it is for a 5.9l cummins I would not suggest it as the turbine wheel is a choke and a bigger comp wheel without a bigger exhaust doesn't perform well. I know as I have tested it.

@@bcbloc02 how about a cummins 4bt ?

@@unclebuck6291 what rpm do you run at and fueling? Bigger wheel will add lag but gain high rpm power. From 2500rpm and down stock(56mm like the intercooled trucks had) is best. Above 2500-3000 probably a gain.

@@bcbloc02 100 over injectors pump mods 60/60/12 turbo

@@bcbloc02 or a 62/64/12

Yes I can do it. Do you have a cover to get the contour from or will it have to be done based off the wheel only? Also you said turbine housing and compressor wheel but those 2 parts don’t go together?

@@bcbloc02 I misspoke, late nights I meant compressor housing. Right now it’s made to fit the stock 59.89mm compressor wheel, I want it to fit a new 62mm one

@@bcbloc02all I have is the stock cover and wheel and a new compressor wheel. No one wall aftermarket larger compressor housings anymore

@@enjoyer4128 is your comp cover the style bolted on with the plates? I actually think I may have a 62mm one of those. I don’t know what your performance plans are for it but there are lots better performing options than an h2e I quit messing with those and hx50s 20 years ago because they were very prone to breaking shafts and exploding.

@@bcbloc02 the only reason I’m building it is because it’s what I got and I don’t feel like going out and buying a new one yet, it has the ring thingy in the back that holds it on

All I did was hit it with some high temp paint and assembled it with the shaft to hold the wheel centered. Before when I was fitting it it was rubbing because there was nothing to guide it and I had it against the cover but in real life the thrust keeps it held away so the clearance is right.

This 80mm wheel would grow into the housing with only .5mm clearance. It is unlikely you run 80+psi of boost.

bcbloc02 my turbo has 2.5 bar of boost max at 80.000rpm, yours will have 5.5 bar (80 psi?)wow, will reach 150.000 rpm?at that speed it will extend,grow....

Hey bud do you have an email or phone number you can be reached at thanks. Bigbossfab@yahoo.com harv