Holset Turbos, PART 6

[viperlp01]

I hope this is in the right section.

So far i ordered a WH1C, the hx35 BEP bolt on housing, Tial 38mm gate, still debating on o2 housing(either SS or mild). Now i have the oiling issue..

Is it that much easier to just buy the oil feed kit or do you guys have any advise on how i can piece together a oil kit for it.. so far i have seen two different oil inlets.. one is a 1/4 npt and the other was 12 x 1.5.. Once i get that thread figured out where do you guys suggest getting the line to feed to my oil filter housing? I have balance shafts and oil squirters so i know my oil pressure is within spec.. I do have an oil pressure gauge and max psi when warm is like 80ish.. Do you guys think it would be ok to use solid line or should i go with SS braided..

Next issue is the return.. Is it really worth it to spend 70 bucks on the return. I seen the garret return fitting for like 15 bucks and could i just cut the stock line and then run rad hose to it and clamp it down or should i go another route..Im just trying to open up a discussion from people who have made there own lines or have suggestions.. Thanks.. in advance and sorry about the length

 

[talon20g]

Thought some of you might find this somewhat appealing. Here is a pic/start up video of my hy35 build.
YouTube - Talon hy35 pics/start up
Hopefully she will be all the way together soon and I can give ya'll some numbers. I have driven it and done a few pulls... way stronger that the 20g!!!

 

[Slippi84]

Thought some of you might find this somewhat appealing. Here is a pic/start up video of my hy35 build.
YouTube - Talon hy35 pics/start up
Hopefully she will be all the way together soon and I can give ya'll some numbers. I have driven it and done a few pulls... way stronger that the 20g!!!

"9 thousand rpms I think it will hold together for a few days"

 

[chrisb33]

been following the holset threads since i got my hx35 with bolt on bep housing.

a question was raised in the latter part of this thread which really wasnt fully answered and i share the same concern.

anyone here using an hx35 with an unhacked 2g maf? some say it's a restriction. im only aiming for 400whp max. i can do a gm maf set up especially now with the dsmlink v3 where you can hook it up directly to the box with their maft cable. but i was emailing thomas about my concern, and he says that the 2g maf should be fine and EASIER to tune vs. the gm maf set-up.

any thoughts on these?

what kind of numbers are you hx35 netting with the 2g maf? thanks.

profile not updated btw coz im just starting to gather parts for my engine build but if needed here they are:

7 bolt ross piston/eagle rods
arp, eagle bearings, etc.
big fmic
hx35 with bolt on bep housing
bc 272/272, springs and retainers
cyclone intake manifold
meth injection - single m7
dsmlink v2
fp exhaust manifold
ebay 38mm external gate

thanks.

chris b

 

[JWoodley]

I'll have my car running by the weekend if anyone is even remotely still interested.

 

[My1GLaser]

Would a velocity stack on the inlet of an HX-35 be beneficial? Here is a pic. Obviously it will be centered when installed. I am still going to run a 4" CAI to the stock SMIC location, but I'd like to use this if I'd see a benefit. Would I possibly have surge issues and under what circumstances?

 

[babyviper]

You May Under Load In Hi Gear With Like 1/4 To 1/2 Throttle

 

[gbradley]

I'll have my car running by the weekend if anyone is even remotely still interested.

Hey Joseph, let us know how everything turns out, still interested!

 

[jrohner]

anyone here using an hx35 with an unhacked 2g maf? some say it's a restriction. im only aiming for 400whp max. i can do a gm maf set up especially now with the dsmlink v3 where you can hook it up directly to the box with their maft cable. but i was emailing thomas about my concern, and he says that the 2g maf should be fine and EASIER to tune vs. the gm maf set-up.

16G here, but I'm at 400hp; I removed the whole intake pipe, filter, and airflow sensor on the dyno and my numbers only changed like 5hp & 10 torque or something.

 

[chrisb33]

16G here, but I'm at 400hp; I removed the whole intake pipe, filter, and airflow sensor on the dyno and my numbers only changed like 5hp & 10 torque or something.

thanks man, that gives me a little bit of comfort using just the stock 2g maf.

how about the other holset users? im sure there's at least ONE of you who had experience with using a 2g maf.

thanks.

chris b

 

[Weapon-X]

Would a velocity stack on the inlet of an HX-35 be beneficial? Here is a pic. Obviously it will be centered when installed. I am still going to run a 4" CAI to the stock SMIC location, but I'd like to use this if I'd see a benefit. Would I possibly have surge issues and under what circumstances?

Is it me , or does that velocity stack not look big enough? WTF

It's covering the majority of the MWE grooves.

 

[My1GLaser]

Is it me , or does that velocity stack not look big enough? WTF

It's covering the majority of the MWE grooves.

Its just not centered. It completely covers the intake and MWE grooves when its centered. Will I limit peak lb/min flow by covering those grooves? I'll probably try both ways just for the hell of it and compare airflow.

I'm gonna have to take another pic with it sitting straight. It doesn't have the turbine housing right now so its kinda top heavy.

 

[SpeedAddict62]

Its just not centered. It completely covers the intake and MWE grooves when its centered. Will I limit peak lb/min flow by covering those grooves? I'll probably try both ways just for the hell of it and compare airflow.

I'm gonna have to take another pic with it sitting straight. It doesn't have the turbine housing right now so its kinda top heavy.

A velocity stack should be excellent for airflow, since you won't form a vena contracta. If you cover those MWE grooves, you will narrow the compressor map and go into surge easier, so I wouldn't do it.

 

[My1GLaser]

A velocity stack should be excellent for airflow, since you won't form a vena contracta. If you cover those MWE grooves, you will narrow the compressor map and go into surge easier, so I wouldn't do it.

Ok. So I need a different one...thanks.

 

[dsm-onster]

The velocity stack is actually too wide. You want a smooth shot to the inducer diamter directly. Teh MWE grooves will function fine if the outside diameter of the velocity stack doesn't come out flush with the large diamter of the inlet. THe point of the MWE groove is to actuall let flow out of the inducer before it gets to the compressor blade tips. With that said I've run my big h1c with the bolton housing for years (fast spool and no MWE groove). No surging whatsoever.

A diesel likes to surge a turbo more than a gasser. There is already a large compressor housing and a wheel designed not to surge. So the turbo is designed not to surge as much as possible even without the MWE porting.

Back to the velocity stack. It will help topend and at the end of the compressor map the most. Smoothing and organizing the airflow into the inducer helps get massflow up. It gives the inducer more air to draw into the compressor wheel.

 

[My1GLaser]

Great explanation. Thanks! I'll look for a correctly sized one because I am definitely interested in more top end flow since the .55ar BEP bolt-on housing will limit the potential of the 7 blade compressor wheel.

 

[Ceddy]

Does anyone know where to get the O2 Housing Gasket for the BEP .55 Housing?

With my .55 Housing and 3" Tubular O2, the stock gasket doesn't match the divider between the turbine and wastegate exits. I would like the gasket to match up to at least one of them.


I think TheTurboTrader use to have gaskets made specifically for the BEP Housing, but can't find his site anymore.

Anyone know of any other suppliers?


Thanks.

 

[dsm-onster]

I don't kjnow of a supplier. Contact BEP. It's ben 3 years since I've run my BEP 60-1 turbo, But I used a gasket that fit well. I think I got it from BEP, . . .If I recall corectly

Concerning the velocity stack and turbine choking flow. The turbine choking the flow of the whole system (engine and comrpessor) obviously has little to nothing to do with the compressor choke. The velocity stack helps flow when you're at the edge of the map. It actually extends the map for your particular compressor. A turbine that keeps you from exhausting the motor properly will never allow you to see the full potential of the compressor. No getting to the current edge of the map that charaterises the common inlet; much less a map that has more flow via a bellmouth entrance. You're only increasing flow potential of the compressor. If the turbine chokes a compressor that flows less, making the compressor flow more is a waste .

The bolton housing with the hx35 turbine wheel poses a choke for the 7blade hx35 60lb/min compressor. You CAN see 60lb/min. But you have to go through a lot of VE encouraging, pumpingloss remedying, etc, issues. . . You're better off figuring out how to get the 60lb/min out of the turbine than increasing the 60lb/min potential in the compressor.

 

[andy4g63]

Great explanation. Thanks! I'll look for a correctly sized one because I am definitely interested in more top end flow since the .55ar BEP bolt-on housing will limit the potential of the 7 blade compressor wheel.

I have BTW 4" velocity stack and air filter with it.. Brand new.. $80 shipped.. It is like $100 from the company.. If anyone interested, send me PM..

 

[turbo addict]

Covering the mwe groves will increase flow but does shift the surge line back to the right. But over all it will flow more air if it is covered. This is an option on a lot of the supra turbos (to use a bellmouth or air horn and cover the mwe groves for more top end)

 

[Maglin]

I like it not to surge as much. I had a decent amount of compressor surge on the HX35 with BEP housing. It was usually when I would hit 8-12 PSI during part throttle cruise. And of course the subsequent stall I would hear when I had to lift off to come to a stop light. Man it really wasn't all the fun to just drive around town. I must have stalled that turbo a few hundred times and it was still in perfect shape when I put it on my buddies Talon build. And since he spent good money on some better parts it almost never saw surge and I don't think it ever stalled. I think it had more to do with his large cams which moved the spool up in the RPM band and allowed far less boost under normal city driving.

 

[My1GLaser]

Thanks for the explanation dsm-onster. That makes sense. I got the 7 blade even though I was getting the BEP housing so that I could get more out of it one day by switching to the T3. I just bought a FP race mani, fabbed a tubular O2 housing & ran a recirc 38mm off of it. After all that work, I wanted to stay with the DSM housing for a while.

I have +1 valves, a BJs head & 272s, so I have some VE mods. Surely the stock IM will limit me at some point, so I will have to make my VE map in DSMLink and see. I also have adj cam gears that I can try to dial in the upper rpms with when I run out of other options.

I am sure this is for another thread, but I will look into trying to reduce pumping losses. Shit, I'll be happy with 50 lb/min in the meantime. 42lb/min is a blast on my 18g, so another 80ish hp will be more than enough improvement for a few months.

 

[dsmmatt28]

Well my buddie just put down 494 hp hx35 t3 holset 12cm turbine housing full boost at 4k. This was on a MUSTANG Dyno. Witch we all all know reads low. The clutch started to slip so we end the dyno session. This was done at 35psi dropping down to 33psi. Straight e85 and 22* peak timing. I thought this was pretty darn good for a turbo that has over 200k miles.

 

[My1GLaser]

Does your buddy have a DSM? What is he using to tune? What were the airflow numbers at that boost? 7 or 8 blade compressor wheel?

 

[dsmmatt28]

Yes its a dsm. Im not sure on the blade. He is using keydiver chip/Maft Generation 2 translator and Ls1 maf.