Machining BEP .70 a/r housing to fit HX52

[Cdc1221]

Very nice guys. Can't wait to see this in action

 

[Boostdriven]

I'm anxious to find out myself how this thing is going to work. I'm going to talk to Bob at BAE and see if he will interested in making those things for us. I'm sure if it works well on a high rpm gas engine with low drive pressure then it will work just as well on a diesel engines.

 

[airmail96]

This is awesome, you may be opening up a whole new market for yourself . Totalling subscribing to this.

 

[dsmcurse]

yep, boostdriven is the new sheriff in town for sure

 

[Boostdriven]

yep, boostdriven is the new sheriff in town for sure

I don't know about all that

 

[nfernotalon]

I hope this works out, it can be a crazy set up especially when when hx52s are dirt cheap as cores. Subscribed.

 

[LandSpeed-DSM]

That huge compressor cover teamed with that small turbine housing reminds me of a FP , at least it has a REAL exhaust wheel in it tho....

Elaborate please.

 

[dsmcurse]

landspeed, i know your a very knowledgeable mechanic/tuner based on previous conversations with you, SO, im sure you know what im talkin about

id explain it in my own words, but then id get two dozen haters hating on me.

"I bought a FP, so its GOTTA be the best"

pfff....

i to have had my fair share of turbos from MHI to garrett t-2-littles to turbonetics to PTE. after seeing many turbos and using many turbos i found this magical lil series simpily known as HX...

 

[LandSpeed-DSM]

I'm curious because the hx52's turbine is relatively small in proportion to the compressor, for emissions purposes I have to imagine.

Wasn't sure if thats what you were getting at.

 

[dsmcurse]

just thought id share some of my pictures from this project. WERE OH SO CLOSE TO HAVING IT RUNNING! tomorrow after work we should have it up and running and we'll post pics of the data log

PHUNNY, if your out there were all still waiting to see the pics of your back pressure vs's boost pressure with that new FP black
Boostdriven didnt build you a EMAP kit for free for you to flake on the results...

just sayin

 

[JusMX141]

Looks impressive; I'll be curious to see the results as the 67mm/99mm HX52 was never intended to be a T3 turbo...as some have pointed out, the HX52 turbine is a bit smaller than other turbos in it's size/frame category so a smaller turbine housing may not be wise.

Great job on modifying the housing, however.

 

[Boostdriven]

Thanks Justin.
Honestly I don't think this housing will be an issue with this turbo but we will see. I wouldn't say that exhaust wheel is small in relation to the compressor wheel. It's 3-4mm larger (exducer vs inducer) which is already a bigger combination then most garrett turbos and most performance turbos out there. Just because HX50 exhaust wheel is larger then HX52 doesn't mean that HX52 exhaust wheel can not push the 67/98 compressor wheel to its limits, which in this case its not going to see its limits anyways. I think that HX52 wheel has a very good design. The inducer is large compared to the exducer, the wheel itself is tall and it has a nice pitch on the blades.

Yes I agree that unported T3 housing would be a little small, but ported like I did this one should do some justice. I'll try to post few pictures later showing a ported housing vs unported. It opens up the bottom of the funnel inside the housing allowing exhaust to escape in to the wheel from a larger opening therefore reducing drive pressure and lower drive pressure mean more HP in the top end. I've done this with several different housing and always seen the same results.

Anybody want to take a guess at what the pressure ration (boost vs drive) is going to be with this set up

 

[JusMX141]

I think that HX52 wheel has a very good design. The inducer is large compared to the exducer, the wheel itself is tall and it has a nice pitch on the blades.

The trim and blade shape of the HX52 turbine is actually quite similar to that of the HY35/HE351, and that turbine is downright nasty in terms of the amount of airflow it can handle in a tiny little 9cm housing while spooling relatively quick.

I'll be awaiting results for sure.

 

[dsmcurse]

heres some pics

 

[LandSpeed-DSM]

I'm wondering if the slower gasses at the transition from the volute entry where the volume is fairly large are going to create drag or turbulence on the wheel now that it's been unshrouded.

Curious to see how this works out.

 

[JusMX141]

^ I know what you mean, but if you look into a machined 7cm housing on any MHI turbo running a TD06H turbine it actually looks quite similar to the before and after photos above concerning the amount of inducer tip protrusion....and those turbos seem to work just fine.

Definitely experimental, but if you never experiment you never learn anything.

 

[Boostdriven]

I don't think it makes much difference because in the unported housing that point is the same its just a little bit lower in the funnel. I've ran that same ported housing on my HX40 and it worked just fine and after I ported it I noticed the drive pressure dropped few psi. I think its going to work like a champ we should be out tonight doing some tuning, I'll probably post up all the results later tonight.


UPDATE...

We got the car done today and went out for a few pulls. In 3rd gear 30psi by 5500 rpms, in 4th 30psi by 5000 rpms with 19psi of drive pressure. At 8000 rpms at 35psi of boost car has 28psi of drive pressure, can't say that I'm disappointed, works exactly like I expected it to. Tristen is going to post few log pics tomorrow.

Got a little situation though, car will creep from 30psi where the wastegate opens to 35psi by 8000 rpms. My guess is that now since less drive pressure is required to maintain 30psi with a bigger turbo the wastegate can not dump enough and as rpms climb drive pressure increases therefore increasing boost. It's a 50mm wastegate so that shouldn't be a problem but I think the spring inside is coil binding not allowing the valve to open further. It worked fine before but I think more drive pressure was needed to maintain boost with a smaller turbo so wastegate didn't have to work as hard. We'll pull the wastegate off tomorrow, I have few extra springs laying around here so it should be an easy fix.

 

[1glaserfwd]

Very interested how this turns out. I am currently running the hx40 in the bep .70 housing. Any chance of some in car videos?

 

[LandSpeed-DSM]

Are you guys logging drive pressure? I'd like to check out the data.

 

[dsmcurse]

the pic where it says back-pressure 28psi is 3rd gear, the lower back-pressure picture is of fourth gear. earlier in this thread i made the prediction of 8000 RPM, 35psi omni4bar, and 26ish psi EMAP, well, i was off on back pressure prediction by 2ish psi.

35psi boost and 28psi drive-pressure aint to shabby, were thinkin once i swap my "no-cat-back" exhaust from 3" to 3.5" and work a lil custom spring magic on my wastegate we can get that back-pressure number to drop from 28ish to about 26ish EXACTLY like it was thought to do.

in a little while Ill bust out the laptop and upload a full data log for you guys to see, plus more pics

heres some pics of the engine bay all rigged and installed

3rd gear power pull log. the good info is at the very end of the log

notice how the gauges on LINK are laid out all nice and in order, makes it nice when they're organized and not just random

 

[Boostdriven]

So what are some of your thoughts on this, anyone haw any data with a stock 16cm housing on the HX52, I would like to know how it compares to this housing.

 

[LandSpeed-DSM]

So what are some of your thoughts on this, anyone haw any data with a stock 16cm housing on the HX52, I would like to know how it compares to this housing.

I'm thinking that this is a success on your part, and a testament to the design of the 52's turbine.

However, looking at the rise in drive pressure/boost as rpm climbs has me anxious to see what work on the wastegate will yield.

My inclination tells me that any significant increase boost or rpm would show an advantage to the stock housing however. Though only one way to know for sure, even then it could simply be a function of changing cam timing or wastegating. These things are very much setup specific.

I should have plenty of data on my 16cm2 hot side before this month is out. Sorting out clutch issues is holding me up.

 

[bastarddsm]

Is that airflow correct? Its not moving much for its size. My he351 moves that much at the same boos with way more drive pressure.

 

[Boostdriven]

Is that airflow correct? Its not moving much for its size. My he351 moves that much at the same boos with way more drive pressure.

The air flow in ECMlink is calculated off of boost estimate, boost estimate is a calculation of an actual boost. If the VE table is at 100% then the air flow is only as accurate as the calculation in the ECMlink. In another words if you can get a 16g to hold 35 psi of boost to 8000 rpms your going to get the same air flow as you would with HX52. I see people on here throw out flow numbers as if those numbers mean something when in reality they don't mean shit. My VE table at higher boost (30+psi) is in the upper 80s so my flow numbers could be lower then a guy who is running HX35. I emailed Thomas at ECMlink a while back and thats the info he gave me.

 

[bastarddsm]

How much injector is it using? I moved 67lbs/min based on fuel consumption and power.