okay guys, before someone links me too the holset users unite thread... I've already been through most of it. basically this is my first time trying to do a turbo build on a b18a1 from a 93 integra.

so the I got the in/exducer sizes from a cummins forum. I have a h1c off a 1st generation, non- intercooled pickup. On the compressor side it has an inducer of 50mm and and exducer of 83mm. I did the math by putting both numbers to the 2nd power and dividing the top number by the bottom and then multiplying by 100 which lead me to 36 trim? is this possible or did I do something wrong? the hotside has a 18cm housing has an inducer of 70mm and exducer of 60mm. so its got a big *** hot side and a little compressor side. I've been looking at two things that I believe can riddle my issues.

this moves the compressor wheel up in size and makes it about a 52 trim
:High Performance Upgrade Kit by BAE Holset H1C WH1C 62.00mm Inducer 86.00mm Exducer Compressor Wheel Polished Housing (V-Band Connectio-1

and this

Holset HX35 H1C HX35W Turbine Housing 9cm Non Wastegated Tim's Turbos | eBay

the 9cm drops the hotside down to I want to say a .65 a/r. they also offer a 12cm housing but I'm not sure which would be best for my application.

I want to make 300whp or 350 reliably. I don't care what psi I have to run. I want it to be more of a conservative cruiser type of car that I can romp on when I feel the yearning. what do you guys think? ill post some pictures of the turbo in a minute as well.

 

That does not look like a 83mm exducer on the compressor.. Looks a lot smaller. Also, think you might have flip flopped the hot side. Why not measure it yourself?

 

Very easily done with that turbo, (trim wasn't the important thing to calculate, but giving the other measurements was) the only thing needing a change is to a smaller 9cm turbine housing, which is perfect to use. Just get rid of the big turbine housing.

I'm sure it'll be just fine, just understand that if something goes wrong, its better to simply find another one with the same specifications than it would be to rebuild it.

 

thanks the shodan! that's what I was thinking. I got the turbo brandnew or atleast rebuilt I'm not sure the holset plate on the compressor housing was missing but it has no shaft play and spins freely on both sides. what do you think supporting mods should be motor wise and how do you think this thing should spool with the reduced housing?

 

well, that's the smallest h1c of the two. I believe there is an 8 blade one that's larger and then this one. I could measure it but I didn't wanna really **** with anything until I asked you guys. once I get it all sorted out ill pull it apart and measure the sizes forsure

 

The hot side inducer/exducers are reversed. He did it properly

 

Well I know I've seen you in the holset thread a lot(theshodan) so if I ran pretty much a stock head ls head with pretty much stock bore but forged internals and stock 9.2:1 CPR and a bottom mount log manifold, edelbrock intake manifold, 3" resonated exhaust no cat what do you think the spool time would look like?

 

Responsiveness would be similar to that of an older Garrett T3/T04E 50 "trim". But that's only if you changed that turbine housing

 

Alright thanks man I'm going to order one up within the next month or so

 

well. If they're around. It's hard to plan for those via eBay. They get snatched up pretty quickly. Many have learned that when they find the very specific Holset they want, they won't find a second on with the same measurements, and go through the same questioning repeatedly.

Get it while it's there, before you can't.. please plan for a PLAN B selection.

 

Well I already own the turbo and they sell the housings right here from Tim's turbos http://m.ebay.com/itm/Holset-HX35-H1C-HX35W-turbine-housing-9cm-Non-wastegated-Tims-Turbos-/161972408422?nav=SEARCH

As for the turbo it's seems brand new like it came with the plastic caps on the oil feed part on the bearing housing.

One last thing, how much boost do you think I'd have to run to make 300 to 350whp? I know it's relative to the setup but just a ball park pressure because I want to figure out what wastegate spring to run in order to get that. The 9cm housing also is non internally wastegated so I can run an external one

 

Let's just say you'll need more than a 9psi spring and should run a manual boost controller to get to your goals.

 

Alright thanks man

 

Why do you recommend I run an mbc btw? I understand the functionality of them. But would it only be good for the sake of when the cars being tuned? I was thinking that these things like pressure over 1 bar so should I just get a wastegate spring rated for like 14 or 15 psi and go from there? I also don't know where to hook up the controller. I see in diagrams that it hooks up off a fitting that seems to be on the compressor housing....but my holset does not have that. I'm slightly confused as to what direction I should go as far as that.

 

That's very easy. Instead of tee'ing the line to the compressor cover, you take that to the actual intake manifold. NONE of my GT Garrett turbos have boost reference nipples either. In actuality, Intake manifold is the better source anyway.

And yes, you must be TUNED at those boost pressures before you can safely run them. You cannot run them before and THEN go to the tuner. That's the quickest way to destroy the car.

I recommend a good manual boost controller over the fancy stuff until you can get everything sorted out..

 

Define fancy haha and you think I need to upgrade y valvetrain for my goals or some arp headstuds and rebuild?

 

so sorry to bump this thread back up but i've been trying to find out what size the oil feed is and if I need to run a restrictor or not. also as far as the oil drain size what would you guys recommend? I've heard a -3an fitting and no restrictor for the feed line since its a journal bearing turbo. I've also read over on a z32 forum that people running them new or remanufactured were having issues with the drain fitting being to small and not matching the hole on the bearing housing and pushing oil back up into the turbo and ruining it.

so, that's been my man issue with this turbo and there isn't a lot of information on the h1c's besides the few posts on other forums I've read. I hear more about hx-35's and 40's and hy35's. maybe this turbo I got just sucks I don't know but I really would appreciate any of you guys help.

 

Anyone?

 

The drain flange I have....I love how it's ported out to match the chra opening.
T3/T4 Turbo Oil Drain Flange ? Ported ? o-ring?d -10AN

 

Is yours on a holset? I know thats a quick way to kill a turbo.

 

Yes, an H1c, but different from yours. A lot of chra's outlets will work with that size flange.
Made in USA. I can't believe they sell them for the same price as a lot of Chinese crap.

 

Alright thank you boss. I'm gonna order up one once I get home

 

So I have been searching and I read that -4an is the recommended feed line size for a journal bearing turbo.
I also have been having trouble figuring out what the thread size is and what fitting I need. I've been on the dsm forums a lot and I'm hearing m12x1.5 for Hx35 but m16x1.5 for h1c's. If you guys have any clue what size it is I would appreciate the insight. I'be been working hard to do this myself but I need you guys help because I know no one who is into Honda's around me. Also, would I run the reducer fitting m16x1.5 to -4an just straight to the braided hose or do I need another fitting? And is -10 an too restrictive for the drain? I was recommended a flange for the drain on the housing but it's a -10an fitting. Would I just find like a -10an to -12 an adapter for a -12an line? I'm somewhat confused but I'm willing to figure out what all of this means. So please my fellow Honda tech family help me

 

Don't fall for that. "journal bearing turbo" could be anything. It's not based upon just size feed line, but the actual amount of oil lubricating the turbine shaft. If it is a type that uses a specific restrictor range, that -4AN vs -3AN goes out the window.

For Holsets and large Borg-warners, -4AN is standard as they use a LOT of oil to lubricate their turbine shafts

There's no right answer for that, because it depends upon the turbocharger you actually have. Unfortunately, like I stated, even the H1C had over 5 different variants, all with different thread pitch/depth sizes. You will more than likely have to wait until you get the turbo in hand and get to the hardware store to start testing out fittings and sizes. If you have a nice tap-set with some thread pitch gauges, that will help even more.

This isn't really a Honda specific thing. That's what you have to realize. You may want to check the Holset Users Unite! thread in order to give you some additional guidance. This is more of a turbocharger investigation, and the fact that you have a specific engine really lends to the oil pressure and how the turbo taps into the oil pan. That's about has Honda-specific as you're going to get.

Again, you won't know until you actually get it. Try it to see if it fits, take photos, get back to us. Too many variables to answer that question with precision, sorry.

I think the flange you were directed to was based upon the style of the flange with the integrated gasket, not the actual sizing of the flange. Honestly, it is a nice piece but not necessary, only preferential. Using a -12AN sized line for that type of turbocharger from Holset is actually ideal. If it can get to about 1/2" out of the return at the flange (or pretty damn close to it) you're actually ok, and won't damage anything. But I recommend -12AN ONLY, with no adapter or conversions.

Understand that Holset community is a bit of a different animal, and that unlike many of the Garrett-styled turbochargers that are supported by companies that have flanges, fittings, lines, and other equipment, you may have to be a little creative to get this right. We don't mind helping, but having as many pictures as you can, referencing the Holset thread, and getting familiar with just these fitting sizes in general, will help you in the long run.

We won't let you down, but you have to help us... help you.

Keep it coming, and don't give up!!

 

Dude I must say....you are the man! I gotcha too about holsets not having your standered Garrett support. I have the turbo and the Orange plastic cover that fits into the feed hole. Now as stupid as that sounds I think it might lead me somewhere as a start. I've heard a bunch of different fittings and pitches so now I will get down to the bottom of this now that the turbo is in my possession. And by no adapter for the return line do you mean like a step up like I was suggesting? You reccommend just straight -12an drain flange and line and 1/2 bung on the oil pan? I know oil pressure has a lot to do with how much is going into the turbo at certain times. I hear holsets like oil but is that on specific vehicles with higher oil pressures and dependent on where you tap or run the feed line from? I hear a debate between restrictors and no restrictors as well. I just want to sort this out before I purchase too many unnecessary things haha