Holset Turbos, PART 4

[dsm-onster]

Josh, didn't I post those numbers up for you ? They are from the honda "holset users unite" thread:

Pro wheel and compressor housing part numbers

Ihatedsms and Jkimes, the best way to get an hx40 pro seams to be to get any hx40 that's rebuildable (they are on ebay and and goldfarb as cores for a very affordable price) and use the above part numbers to add the pro wheel. The hx40 found on ebay and in diesel classifieds or at used parts brokerage firms are 8blade 58mm turbos. First off these wheels arn't that bad. They spool faster than the pro wheels and flow in the 60-1 range, 58ish lb/min. But that is about 9lb/min less than the super40 6 and 7 blade wheels. IIRC, you won't need to machine the back plate as mentioned in that honda holset post since you will be working with an hx40 frame. So Gillett Diesel can do the work for the rebuild and source the parts for the pro wheel and install during the rebuild. Gillit Diesel even sells used turbos, so they may have an hx40 laying around. If they don't, contact goldfarb and associates. Jusmx141 does a great job rebuilding and he's been able to source holset parts. I recommend Justin (jusmx141)to source the pro parts and rebuild if you get your turbo from goldfarb, or Gillet to source the proparts and rebuild in house if they have an hx40 laying around for you. HX wheels come prebalanced from the factory. All this should cost around $600 and you'll endup with a professionally rebuilt Holset with the super40 wheel.

Remember Gillett is a diesel shop. And they really get turned off when you arn't sure what you want for your 4cylinder sports car gasser. They won't be able to answer your gasser related questions. They don't know how this turbo will act on your car. In fact, 99% of the time they will tell you that you'll never even get it to spool. So just ask: do you have it, when can you get it done, and how much. Once they see that you're serious about this (flash credit card numbers), they will be in your corner.

 

[Slippi84]

Dammit.. Im starting realize why so few people run holsets. I've been trying to buy one for the last 3 months, but finding a part number for an hx40 pro with a 60mm inducer and a 19cm housing seems to be harder than photographing Nessie. I may just forget it and order a B/W S366 instead. I've tried multiple browser searches (Google, yahoo, and dogpile) as well as reading through hundreds of posts on multiple car and diesel forums in an attempt to locate the correct part numbers (assembly number) for hx40 pro turbos but even holset's web page doesn't list them. The last time I posted (a few pages back) I copied a list of all the available holset part numbers that the vendor I am trying to buy from has in stock. The seller is not willing to go rummage through thir entire inventory just to tell me which turbo is which so I need the correct part number so that I can go ahead and buy the damn turbo and ship it to my tuner so I can get my car back on the road. My car has been in Little Rock for 8 months, and the turbo is the only part I have left to buy to complete my upgrade. If any of you have any idea where I can find the correct hx40 pro assembly numbers I would be very grateful. Thanks in advance.

Josh

Post stuff like this in the holset part number thread

 

[jkimes]

Thanks again Matt, you sir are the cat's pajamas. The honda forum you linked too in the past only had one part number and it is not available from goldfarb, but the new part number list you compiled in the holset part number post combined with the rebuild info in this one should finally get me the turbo I want. I really appreciate the help.

 

[dsm-onster]

Go forth, boost, and make good times.

 

[KPEclipse]

Sean, you keep harping on this, and I've been meaning to ask Matt, so I might as well post it for everyone's betterment. The divided housing really makes that big of a difference?

It really flows that much more than a standard t3 manifold, with the wastegate port?

 

[Slippi84]

Sean, you keep harping on this, and I've been meaning to ask Matt, so I might as well post it for everyone's betterment. The divided housing really makes that big of a difference?

It really flows that much more than a standard t3 manifold, with the wastegate port?

Yes sir

 

[dsm-onster]

The divided housing with an open header design makes the exhaust gases see one HUGE volute. Look at darkhorizon's logs (60lb/min) and TimG's trapspeed in nearly a full weight car (132.5mph, about 600whp). Both run the hx35 turbine wheel that is slightly larger than the t3 stage 3. They both run the stock hx35 turbine housing (divided) with an open header design (un-divided). The spool speed is a little laggy, but just upgrading the compressor wheel put Tim's full weight car almost in the 10s (he needs a better 60ft), and completely maxed out the 7blade hx35 compressor for darkhorizon.

A divided manifold and divided housing will give you very much spool speed at very little cost of peak flow. Look at the evo8 turbo. Mediocre boost and a decent set of cams and the compressor is maxed out. The individual volutes are actually very small. But the turbine outflows the evo3 16g turbine and spools faster though they have the same turbine wheel and compressor wheel, just reversed scroll.

 

[ScottH]

I need to know the Part number for the HX40 6blade billet wheel turbo asap. Any help is much appriciated.

Thanks,

 

[Slippi84]

I need to know the Part number for the HX40 6blade billet wheel turbo asap. Any help is much appriciated.

Thanks,

http://www.dsmtuners.com/forums/turbo-system-tech/312186-holset-part-thread-only.html

 

[ScottH]

http://www.dsmtuners.com/forums/turbo-system-tech/312186-holset-part-thread-only.html

That thread wasn't much help figuring out the part number for the billet 6-blade hx40

 

[Slippi84]

That thread wasn't much help figuring out the part number for the billet 6-blade hx40

Not yet but that's why you post your questions there so others can help you instead of crowding this thread up with part number request

 

[dsm-onster]

The billet wheel is an aftermarket upgrade from every source I know. There is no factory vehicle with the super40 (pro) wheel either. It seams that it is an upgrade pice for the powerstoker vs. cummins war. . . I have listed part numbers for the pro wheel and compressor cover. There's no need for the billet wheel. Holset uses superback technology. Their compressors don't break. The billet wheel is how much lighter? And the compressor weight has a VERY minimal effect on spool speed. It's a nice option. But don't rack your brain trying to find it. Contact the diesel shops we've posted about and see what they can do. . .

 

[AXRabbit376]

I really don't think those wheels are true billet. You all realize the complexity to CNC a compressor wheel? At $100/hr, I can tell you it'd take ALOT more than an hour to make one.

I'd bet it's merely the machining marks/etc, from the mold to produce them. Might be one particular part# wheel that the mold wasn't finished as nice as typical and you can see the marks in the mold.

Incorrect. The wheels are actually true billet. Holset was using titanium wheels on some of their turbos but is now using 100% billet wheels as the new hot-item. They are more durbale than the titanium ones. Not sure about weight. These are diesel turbos, where durability far outweighs spool time.

 

[byebyev8]

I'm goin to get either a hx35 or hx40 for my stock internal jdm6bolt motor. I don't want to run anything over 28psi.I really want to get deep into the 11's (120+mph traps)next season without having to go with forged internals. So which is the better turbo for 450whp max. Right now I think I'm goin to be goin with the bep bolt-on housing but i might just use the holset housing with a t3 manifold.

 

[95tzlgst]

I would go with the hx35 either in the bep bolt on housing or the t3.70ar housing. My goal is also 450hp and I chose to go with the t3.70ar. I hope this helps with your decisions.

 

[dsm-onster]

The hx35 with a bolton housing will give you your goal easily and have less lag. The stock housing would be something good for 50-75 whp over your goal.

 

[420a-t]

I've seen a stock bolt on housing and a hx-35 do 550whp. I'm shooting for the same goal as you (low 11's) and I chose an H1E and a bolt on housing.

 

[darkhorizon]

Just a pointless little update..

I am still dinking around with intercoolers, so I ran around for awhile unintercooled...

Results were very interesting, I could tune it very lean (11.4ish) and still run about 15psi worth of boost. Most of the intercooled guys running garrets are dialing in street tunes at 14psi.

My airflow is still low, and I dont have any way to directly compare it to anything else, so I may just be seeing some restrictions somewhere that are inflating my boost numbers, but either way its neat.

Airflow was pretty steady around 310g/s typical 300whp setups I see run about 290g/s with superchargers.

 

[Slippi84]

Just a pointless little update..

I am still dinking around with intercoolers, so I ran around for awhile unintercooled...

Results were very interesting, I could tune it very lean (11.4ish) and still run about 15psi worth of boost. Most of the intercooled guys running garrets are dialing in street tunes at 14psi.

My airflow is still low, and I dont have any way to directly compare it to anything else, so I may just be seeing some restrictions somewhere that are inflating my boost numbers, but either way its neat.

Airflow was pretty steady around 310g/s typical 300whp setups I see run about 290g/s with superchargers.

And IAT and EGT were threw the roof

 

[darkhorizon]

EGT was most likely very low. the SC cars have little issues running unintercooled, at less than 50% efficiency, and 12 degrees of timing.

I was most likely well over 50% efficiency, and 18 degrees of timing. My manifolds were hardly getting warm looking, while the supercharged car I raced gets bright orange nearly every time he runs his car hard (even with 23 degrees of timing). My intake temps were nothing out of the norm in these motors, the blowers are un intercooled stock, and they make TONS of heat.

I suppose my inference is flawed if the supercharged guys are running stupid high EGT's, but I am fairly confidant they are not.

 

[KPEclipse]

I saw the hx35 in the BEP housing make a smidge over 500 HP.

I'm kind of giving up hope on snagging a hx35...i may just do the WH1C...i just hope in the BEP housing it'll reach 450/500 hp.

 

[darkhorizon]

If I was you, I wouldnt settle for anything less than a 99-01 HX35, these things are sweet!

 

[KPEclipse]

I found one for 200 shipped. I'll ###### snag it, get it rebuilt, throw the BEP housing on.
The only bad part about these turbos is the Garrett return line, the -10 AN drain lines are like 100+ as compared to the 30 I paid for a 1g oil return to put on my 16g.

Can't rush it though, I have other things to take care of, like my sh!tty FMIC, plugs and wires first. Then 2g Mani and get it ported.

 

[darkhorizon]

its getting cold now, so you can take your time and do the right build over the winter at least.

post count + 11billion

 

[KPEclipse]

Yeah, I'm chillin with it, it's still nice to have it on the car, getting running smoothly, and soon as it gets warm, change the oil and plugs, and LET ER RIP!