Holset Turbos, PART 6

[ApexVIII]

Yep turn the boost up and your dump will stay cold

good idea!

the WG has springs in it for 20.5psi i believe so ill add another 5ish psi from the MBC

 

[DyNamiC]

I will have mine running probably in the middle of summer. I'm just about finished and I'll be running the h1c first with the 18cm^2 housing and full divided runner manifold, top mount. DyNamiC and I traded housings so that I can stay t3 for when I swap to the wh1e (hx40) and so that he could keep is t4 twinscroll manifold . Between the two of us, we should be able to give a good idea of how it will work on a general setup. I have a 2.0L and fp2 cams I'll be running a stock intake manifold at first. And I'll be using link. So the graphing will tell all.

I will be running 2.0, stock intake manifold, and BC 280's with link v3 running speed density by the way.

 

[TimG]

Just popped into one of these old Holset threads. You guys are still trying to push the envelope with these things but you can't really drive around town on slicks the whole time.

Just an FYI for anyone doubting the reliability of the Holsets; My HX-40/35 hybrid has the exact same amount of play as it did 20,000miles ago. This is on a car that is daily driven, is a work commuter and never has a day off the road from the spring to the first snowfall. It pushes 35psi everyday and I open her up with the exhaust dump open at least once a day. I'd normally want to run 40-42psi but the street tires and city asphalt don't like to stay stuck to the road with those numbers. She still boogies and I FINALLY haven't had any thoughts about bigger turbos when I look at my current set-up. The HX-40/35 hybrid is borderline unstreetable but it's reliable and it scratches the boost itch every single time.

 

[kawboy]

Do a straight 40!

Meth on the car? Ratio/Nozzle size?

 

[WIDSM]

here are some pictures of how mine is going
do you guys think that hte coupler is to close to the Dump? it dumps lower then the coupler

06.22.09

You must be logged in to view this image or video.

Any reason that your not going to recirc your bov? It looks like your running a 2g maf.

 

[TimG]

Do a straight 40!

Meth on the car? Ratio/Nozzle size?

I run two jets. One is a M7 & one is a M12.

 

[gixrman]

Whole crap thats alot of spray! You must go through alot of meth. I run a two stage also but just two M5's.

 

[Slippi84]

Any reason that your not going to recirc your bov? It looks like your running a 2g maf.

+1

 

[Slippi84]

I will be running 2.0, stock intake manifold, and BC 280's with link v3 running speed density by the way.

What do you plan on running your car to rpm wise? I ask because 2.0 280's and stock intake manifold will choke up top bad. Unless you plan on upgrading the manifold later.

 

[DyNamiC]

After I get the car running again a smim will be my next upgrade. I still have not decided which to go with though. Looking at the JMF Drag.

RPM wise I will probably be taking it to 8-8.5k tops.

 

[ApexVIII]

I would have went toward the radiator instead so that it was away from the coupler but if you just put a heat sleve around the coupler area I think you will be cool. Setup looks nice though

what do you mean towards the radiator?

 

[Wicked95AWD]

TIMG, it's good to hear that your holset has been reliable. I keep hearing stories about people blowing them up after only a few hundred miles and it's making me nervous. Are you feeding your turbo from the OFH or the Head? Also, are you using a restrictor? What size drain? etc...

 

[Slippi84]

what do you mean towards the radiator?

The dump tube goes back toward the IC pipe. I would have went down and forward with it away from the IC pipe to keep charge temps down but one that would put it closer to the radiator and two it doesn't matter anyway cause he wrapped the dump.

 

[dsm-onster]

TIMG, it's good to hear that your holset has been reliable. I keep hearing stories about people blowing them up after only a few hundred miles and it's making me nervous. Are you feeding your turbo from the OFH or the Head? Also, are you using a restrictor? What size drain? etc...

Where are the stories? There's one. And he didn't feed oil to the turbo properly. . . That thread is resolved.

Folks. Youre going to blow up PTE (garrett) turbos, and FP turbos, and MHI turbos, and BW turbos if you don't follow the proper oiling procedures. We all should really check our oil pressure after lines and restrictors for any aftermarket turbo. DSMs blow turbos up. It's not a holset thing. It's been happening long before Holsets were an option.

 

[Slippi84]

Ok bottom line where is the safest/best place to run a holset from and should or shouldn't a restrictor be used with such said place. I see this question a lot but it never gets answered straight up always kinda well you can do this or you could do that. Like for GT ball bearing turbo's they say off the head is better and if yoru pressure is too high because of lack of bshafts run a resrtictor .

 

[Hubbard 0]

From what I've read (all 6 threads), the proper place for my situation is to run it off the oil filter housing. I have a 100% stock block (including balance shafts).

 

[dsm-onster]

As already posted. . .


OFH with a .065" restrictor: if you have bshafts or if you don't and have a ported oil relief valve so that you have stock oil pressure.

Head: if you check your oil pressure so that it fits the oiling criteria for the holset turbo and you have no bshafts and no ported oil relief valve.

OFH: if you have no bshafts and you run a restrictor that allows the source to fit the oiling criteria for the holset turbo.

Oiling criterial straight from the manual:

11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal. All turbocharger applications require a pipe of internal diameter greater than 19 mm which has integrated connectors. To ensure oil returns into the engine under all operating conditions, the return connection into the engine sump must not be submerged and the outlet flange of the turbocharger must be 50 mm above the maximum oil level of the engine sump pan. Crankcase pressure should be limited ideally to 0.8 kPa (0.12 lbf/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.
12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).
14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum
torque speed.​

You can use a fuel pressure gauge and an adapter on the head at the allen plug beside the head feed, or "T" in at the line after a restrictor from the OFH; and free-rev in your yard to find out what your motor will do. Once warm for warm criteria. Pretty simple. . .

 

[TxR6guy]

So how are you guy's running your boost controller off the Hx40's?

 

[ApexVIII]

just drill and tap a 1/8th NPT on the compressor housing

 

[red_devil]

Installed my HX40 today, first test drive I had no boost at all at any rpm range. Then hooked the wg and boost source together and tried again and I go nothing. So I took the intake back off and spun the compressor wheel. It spins ok but it seems like its off balance and I have more side to side play than before. Off the car it had minimal play but spun balanced.

Oil was fed from ofh with a smaller -3 AN line with a 3/4" ID oil drain.

Balance shafts and oil squirters in.

Is my turbo done??

 

[red_devil]

To add- oil was put in the turbo and oil feed before starting. Removed the oil feed after starting and it was full of oil so the turbo was getting oil.

Anyone around here want to rebuilt this for me?

 

[dsm-onster]

Contact jusmx414 or gpopshop or your local diesel turbo shop. That turbo was used, right?

 

[red_devil]

Yes it was used

 

[darkhorizon]

Hi everyone!

I was involved in some of the holset threads a few months ago, and I just wanted to come in and post up some of my recent results.

I have been running a stock 12cm HX35 7blade on my 3.8L for many many miles now. It is intercooled with a Ebay air/water IC, and I run it with an open exhaust.

The turbo sounds very loud, its pretty cool, overall exhaust tone is quiet and tame for having ZERO exhaust. I have not run very much boost, but I can for sure make some very big flow numbers, although they temps get quite warm, have seen 90C pre IC on most of my lower 14psi boost runs.

Some flow numbers look like this..

14psi = 320g/s

16-17psi = 390-400

This turbo can take some abuse too, I never really do anything right, no turbo timer, no nothing... I boost it hard alot as well. Spools instantly on my tank of a motor and a auto trans as well.

 

[GST95]

My twin scroll hx40 setup is almost finished finally. I had hoped to have it done 2 months ago, but im never on schedule anyways so no big surprise i guess. I did take it around the block (i live out in the country) yesterday, but didnt have any dumps for the wastegates and had to meter the boost with the throttle. Tonight i made those and fixed a couple of issues i found on the test drive. Tomorrow i should be able to test it out a little. This is the most complete ive got with a holset setup and i think ill be satisfied for a little while. Ill have some track times this weekend at the Pinks All Out event. Im keeping my fingers crossed that i dont break something.

Anyways its late and here is a pic of it so far. The turbo is hiding in there somewhere.

You must be logged in to view this image or video.