Holset Turbos, PART 6

[kawboy]

Port your OFH and run the restrictor or feed it from the head.

No b/s and stock ofh, you're gonna want a smaller restrictor IMO.

 

[jrohner]

Just got my parts back from being ceramic coated, here's a pic:

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And link to my thread with more pics/info:
http://www.dsmtuners.com/forums/hangout/324375-pics-some-progress-new-setup-hx40-jmf-drag-etc.html

Looks very nice, but black valve covers have always reminded me of 420A's.

 

[kawboy]

My manifold is NOT a divided one. Would it be more beneficial to get the BEP .70 t3 housing and run that? How much of a difference would there be between the 16cm housing I have now and possibly the .70 housing? Should I radius the inlet of the 16cm housing to "accept" the incoming air a little better?

Also the ring that is spring clipped to the inside of the compressor cover is used for?

What compressor map can us 56mm HX40 guys use? Is there any maps for this?


I also have no balance shafts and no oil squirters. I also ported the oil filter relief vlave and my oil pressure fully warmed up was 30 at idle and 90 at 8500RPM. I did a small test with a -4 line from the oil filter housing with and without a restrictor and saw NO difference in oil pressure. The restrictor was an .045 " journal bearing" restrictor. Im assuming the restrictor is to cut the flow down? Is -4 line from the OFH recommended with the restrictor on the turbo or right off the OFH?

Thanks for the help and also thanks everyone for sharing there knowledge about this whole holset turbo thing. I cant wait to run mine and I hope I am happy jumping on the bandwagon.

A restrictor won't do much for pressure, besides maybe increase it because it's being forced through a smaller hole. What a restrictor will do is cut back on volume to keep you from "flooding" your chra.

The ring clipped inside your compressor is called the silencer ring. It's there to reduce noise (Whistling), and to reduce noise only.

Based on manifold design, I'd try locating a .70 BEP housing; if you can obtain one. In order to use the stock housing to its potential, a divided setup would be neccessary.

As for flow, in a .55 BEP mitsu housing, expect near HX35 spool and 60-1 or better for power. I'm sure your turbine housing (hotside) will provide more then enough flow to max out the compressor wheel.

Not too much testing has been done with the 56/85 compressor wheels, I'd be interested to see your results!

You coming to the Scranton/WB meet in a month or so?

 

[Slippi84]

Just got my parts back from being ceramic coated, here's a pic:

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And link to my thread with more pics/info:
http://www.dsmtuners.com/forums/hangout/324375-pics-some-progress-new-setup-hx40-jmf-drag-etc.html

Wiggins clamps on the upper rad hook up FTW

Lol I"m using wiggins on my setup too def worth the extra money for pimp boost leak free setups.

 

[dsm-onster]

It was a .63ar housing I had machined to accept the holset. And it seems to work great!!! 23psi by 4000rpm on a very conservative tune. 15 degrees of timing at 7000rpm and alittle rich. The car pulled hard. I will be putting my 272;s back in soon.

Glad to see youre happy with your results. That's a decent spool for a larger turbine housing than the bolton housing. A good tune should give you another couple hundred rpm faster spool. Hit the track if you can and get a MPH number. The t3 .63 a/r housings are all over the place for cheap.

 

[yellow90tsi]

You coming to the Scranton/WB meet in a month or so?

Im hoping so. Not sure if the car will be done though. I will try like hell.

 

[95tzlgst]

Im confused on the oil pressure? I have my balance shafts and I plan on running it from the OFH. Do I need a restrictor or no? if so what size?

 

[selmerguy]

I put my 272's in yesterday and the spool slowed down about 300 RPM. Still a weak timing curve. I added some timing and will post spool results later. At 24psi the thing pulls pretty good though. I will be at the track next week. I am running without a fileter right now because I havent made a intake. I know some people are aginst the screen over the turbo mod but I might have o go that route for a week or so. I need to make a intake soon though. The turbo urts my ears when I am on it!!!

 

[turbodsm18]

Alright guys, I got my setup back today from the ceramic coaters and I plan to put her on this weekend....Holset HX40 7 blade billet comp wheel......

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But I have some questions I need a definite answer to now......There has been a lot of talk about restrictors and optimal oil pressure, but everybody seems to have different suggestions.....

So I want some input from people who have ran the turbos......NO balance shafts, PORTED oil relief hole...Feeding from the filter housing....What would be optimal....

Another question, I ordered a PTE/garret/Turbonetics drain flange(-10an) and here is the flange....

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Is that drain flange big enough, The hole on the center section is MUCH bigger......Will that allow oil to "pool" up inside the turbo.....

Help is appreciated guys, Im ready to see what this thing will do......

-Kevin-

 

[dsm-onster]

Your drain should be fine. I have bshafts, and I fed mine from the OFH all last year and had a SLIGHT amount of oil blow past the seals. This makes sense because the actual holset repair manual states very simply that 72psi should be the highest oil pressure the turbo sees. The lowest pressure it should see on load is 30psi. And idle (and I'm guessing very light cruise) 10psi.

If I moved to feeding from the head, I would not be providing enough oil pressure during idle and light cruise for the turbo since I do have bshafts. I should have ran a .063 restrictor for my OFH install.

If I removed my bshafts, like I am this year, then I should be able to feed from the head just fine with no restrictor. Since the oil pressure at the head goes up just as at the ofh when removing the bshafts. If you still prefer to feed from the ofh, then you will definately need that .063 restrictor.

 

[turbodsm18]

Your drain should be fine. I have bshafts, and I fed mine from the OFH all last year and had a SLIGHT amount of oil blow past the seals. This makes sense because the actual holset repair manual states very simply that 72psi should be the highest oil pressure the turbo sees. The lowest pressure it should see on load is 30psi. And idle (and I'm guessing very light cruise) 10psi.

If I moved to feeding from the head, I would not be providing enough oil pressure during idle and light cruise for the turbo since I do have bshafts. I should have ran a .063 restrictor for my OFH install.

If I removed my bshafts, like I am this year, then I should be able to feed from the head just fine with no restrictor. Since the oil pressure at the head goes up just as at the ofh when removing the bshafts. If you still prefer to feed from the ofh, then you will definately need that .063 restrictor.

With that restrictor though.....Is that only needed for NOT porting the ofh relief hole...?

I dont have Balance shafts.....So from what I got from your post was.....If I was to feed from the head, I dont have to use a restrictor even if I dont port the ofh relief hole.....?

-Kevin-

 

[doesitonall4rs]

If I moved to feeding from the head, I would not be providing enough oil pressure during idle and light cruise for the turbo since I do have bshafts.

I've been running the feed from my head with balance shafts since november, and I have had absolutely zero problems feeding from this spot and my car is daily driven all day every day.

Been running the turbo at 28psi since ###### January, no ill effects, altho i do get worried about the fact that my oil drain line is touching the downpipe...its the blue aeroquip one I hope it doesnt melt.

 

[Weapon-X]

altho i do get worried about the fact that my oil drain line is touching the downpipe...its the blue aeroquip one I hope it doesnt melt.

You should at minimum try to use one of DEI's heat sleeve or some other fire sleeve type of product to reflect some of the heat away from the line if it's that close/touching the downpipe.

I'm pretty sure if the hose is touching the downpipe, it's past it's MAX operating temperature of I believe 300 degrees........... But check on that number, cause I could be wrong.

 

[dsm-onster]

With that restrictor though.....Is that only needed for NOT porting the ofh relief hole...?

I dont have Balance shafts.....So from what I got from your post was.....If I was to feed from the head, I dont have to use a restrictor even if I dont port the ofh relief hole.....?

-Kevin-

Porting the OFH valve is to bring pressure down to stock. Stock oil pressure has pushed a VERY LITTLE oil past my oil seals. So you still need a restrictor.

If you think about it a restrictor is a flow restrictor. It limits the flow so that the pressure goes down. in the line after it. The lower the initial pressure, the less it restricts. So a .063 restrictor would probably be fine for bshafts or no bshafts.

I've never run a holset from the head WITH bshafts. So I can't personally recommend that location. That doesn't mean that it wont work fine. Best thing is just to measure your oil pressure in neutral as you rev through the rpm range at the location of your choosing. The oil pressure is not load dependent but rpm dependent. The turbo is load dependent. So you won't blow the turbo if you have 20psi at 4K though the turbo would be fully spooled or spooling by then because it's not under a load in neutral. As long as you have 30psi by the point your turbo reaches double digit boost numbers, Then you're ok for the minumum. As long as your oil pressure is not over 75psi at your rev limit then you're ok.

 

[turbodsm18]

Porting the OFH valve is to bring pressure down to stock. Stock oil pressure has pushed a VERY LITTLE oil past my oil seals. So you still need a restrictor.

If you think about it a restrictor is a flow restrictor. It limits the flow so that the pressure goes down. in the line after it. The lower the initial pressure, the less it restricts. So a .063 restrictor would probably be fine for bshafts or no bshafts.

I've never run a holset from the head WITH bshafts. So I can't personally recommend that location. That doesn't mean that it wont work fine. Best thing is just to measure your oil pressure in neutral as you rev through the rpm range at the location of your choosing. The oil pressure is not load dependent but rpm dependent. The turbo is load dependent. So you won't blow the turbo if you have 20psi at 4K though the turbo would be fully spooled or spooling by then because it's not under a load in neutral. As long as you have 30psi by the point your turbo reaches double digit boost numbers, Then you're ok for the minumum. As long as your oil pressure is not over 75psi at your rev limit then you're ok.

Looks like im in the hunt for a restrictor.....Would it possibly hurt to run like a .085 restrictor....Something a little larger to ensure it doesnt starve the turbo of oil.....That happened to a local, Non restrictor related, but I dont want that to happen here.....

Either way, I cant thank you enough for the explanations.....

-Kevin-

 

[kraka]

Good luck hunting down a .065 or .063 restrictor. I've been having a hard time myself.

 

[TimG]

Why don't you just weld a brass fitting closed and drill it out to the size you want? Of course, you make sure it's the right JIC/BSP-P fitting.

 

[talonDSMerr]

That's a very smart idea. As long as you have the right fitting for the turbo, you could just have it welded shut and use a 1/16" drill bit for a .065 orifice.

 

[JWoodley]

I highly recommend these guys: eBay Motors: F7 T3/T4 -4 AN REGULATOR Turbo Oil Inlet Flange+Gasket (item 150288646995 end time Mar-20-09 03:41:25 PDT)

I won that auction and will be using it on my setup in the next few weeks.

 

[kawboy]

That's exactly the restrictor I'm using

 

[JWoodley]

They guy does great work. Someone should contact him about being a site sponsor.

 

[turbodsm18]

I highly recommend these guys: eBay Motors: F7 T3/T4 -4 AN REGULATOR Turbo Oil Inlet Flange+Gasket (item 150288646995 end time Mar-20-09 03:41:25 PDT)

I won that auction and will be using it on my setup in the next few weeks.

I cant use that as my turbos oil inlet flange doesnt have holes drilled and I dont want to drill them.....

If I have to, Im gonna end up welding and drilling a fitting......

-Kevin-

 

[Mike1992]

If you wanna customise your restrictor flow I suggest using a nitrous jet . I did this method on my HX-35 car and it worked perfectly.

http://www.dsmtuners.com/forums/art...or-garrett-channel-bearing-non-bb-turbos.html

 

[TimG]

If I have to, Im gonna end up welding and drilling a fitting......

It's what I ended up doing and my Holsets been spooling for 2+ years or so now.

 

[andy4g63]

It's what I ended up doing and my Holsets been spooling for 2+ years or so now.

Same here. Before, I ended up welding a aluminum fitting and drilling it with 0.80 bit. I do not recommend that, cause fitting melted a little and we had to refresh the threads, but in the end bolted up just fine, no leaks. However, buy a metal fitting and do it then...

As I mentioned earlier, metal fittings, that came with kit from extreme PSI/for oil feed from the head/, bolt just fine, BUT the nut on them is too small, doesn't cover the gap and tend to leak. The kit is good, is just the fitting, that doesn't work.

P.S. Now is fed from the head, no restrictor, no BS and it is perfect.