Holset Turbos, PART 7

[JusMX141]

does anyone know where i can get a hx40 compressor housing snap ring from? ive been looking everywhere and cant find one.

I have one- I either forgot to reply to your PM (thought I did) or it got deleted somehow.

 

[boostcrazy92tsi]

Fellas I have a quick question. What is everyone using for a gasket between the bep housing and the o2 housing? Is everyone just hacking up a stock one to meet the 2.75 out size and the larger wg hole?

 

[JWoodley]

Fellas I have a quick question. What is everyone using for a gasket between the bep housing and the o2 housing? Is everyone just hacking up a stock one to meet the 2.75 out size and the larger wg hole?

I used an EVO3 steel gasket and a dremel.

 

[ceedawg]

WOW you broke the "NPXV" tranny gears. Were they shimmed tighter than stock? I agree Mitsu never intended more than 350ft-lbs of tourque to be seen by the transmission.



No, I thought you were going to run it in bolton configuration . I just don't see the bolton housing being big enough with the hx35 turbine wheel size to merrit the hx40 compressor or even the 60lb/min hx35 7blade compressor. No one's yet seen 60lb/min with the bolton housing with the hx35 turbine wheel.

Can't deny the success DSM Matt's been having with his!

All I would have needed for it to do what it could was use a different turbine hsing.

 

[dsm-onster]

And different exhaust manifold and custom o2 housing and custom down pipe. I think I remember you saying you wanted something simple and still cost effective. That's why I said bolton hx40. Spool is about the same as dsmmatt's

 

[Gooberlog]

Not to get off topic, but has anyone seen the episodes of Trucks on Spikes' Powerblock TV on Saturday mornings. The guys on trucks have been doing a build taking a 70's Ford crew cab body and dropping in on to a Late 90's Ram 2500 Cummins chassis. I just think its cool to see the Holset on TV even if they aren't relating it to a dsm. Today they showed they were clocking the turbo so that they were able to rotate the turbo and manifold assembly upside down to make room for the heater assembly on the Ford's firewall.

 

[TSimage]

I asked early to see some HX55 numbers from a couple of you guys who were running it and still haven't gotten anything, where are you guys at? Does anyone have the size of the turbines used as well as its lbs a min. I have been throwing around the idea of running an HX 55 in lieu of a BW s400, but that would be if numbers were comparable.

 

[Gooberlog]

I asked early to see some HX55 numbers from a couple of you guys who were running it and still haven't gotten anything, where are you guys at? Does anyone have the size of the turbines used as well as its lbs a min. I have been throwing around the idea of running an HX 55 in lieu of a BW s400, but that would be if numbers were comparable.

I think on this thread i read two or three guys that were "planning" on running this turbo, but i don't recall reading any of their results. I do think i remember seeing someone say that the HX-55 flows something like 88-90 lbs/min if i recall. Don't quote me but that's what's coming to my memory.

 

[dsm-onster]

I asked early to see some HX55 numbers from a couple of you guys who were running it and still haven't gotten anything, where are you guys at? Does anyone have the size of the turbines used as well as its lbs a min. I have been throwing around the idea of running an HX 55 in lieu of a BW s400, but that would be if numbers were comparable.

DSMTimes.org - Home The hx52 compressor flows close to 90lb/min at 14.4psia and 85*F inlet temp.

 

[Gooberlog]

DSMTimes.org - Home The hx52 compressor flows close to 90lb/min at 14.4psia and 85*F inlet temp.

That's what it was. Thanks for correcting me Matt.
The 10.0 time in the link, was that on a 3000GT VR4 as listed above? And was the turbo a HX52/55 hybrid? or was the 3kgt running twin turbos with one HX52 and one HX55?

 

[dsm-onster]

single turbo. hx52 hotside. hx55 cold side. . . the hx55 compressor flows 100lb/min. . . Remember it takes a large hotside to see the potential of a large cold side.

Regardless, we know the hx52 hotside is good enough for 140+mph in the 30s for boost with about the stock weight of an AWD 1g . . . And 90lb/min is plenty of compressor flow for more.

 

[Ceddy]

DSMTimes.org - Home The hx52 compressor flows close to 90lb/min at 14.4psia and 85*F inlet temp.

Possible typo:

14.4 psia is -0.1 psi on the gauge.

14.4 boost = 14.4 psig = 28.9 psia (At sea level)

90 lb/min while still in vacuum would be a awesome turbo though.

 

[dsm-onster]

14.4psi absolute air pressure (psia) at the inlet.

Below is the 7blade hx35/hy35 compressor map. Mass flow in lb/min is corrected to the inlet pressure and inlet temp on top right. All holset compressor maps assume 85*F and 14.4psi at the inlet.

Below is the hx55 compressor map and airflow (.75kg/sec)

 

[supravw]

I've been looking through the Holset threads and I'm just about set on getting a HY35 setup. I have one question though, I don't see many people using them and that could have something to do with it but could I use the stock internal wastegate? I don't see why I wouldn't be able to but I wanted to make sure. I'd like to stick with an internal setup.

 

[blizz99]

I've been looking through the Holset threads and I'm just about set on getting a HY35 setup. I have one question though, I don't see many people using them and that could have something to do with it but could I use the stock internal wastegate? I don't see why I wouldn't be able to but I wanted to make sure. I'd like to stick with an internal setup.

i'll be running an internal wastegate on my hx40 just to test it out because there's not much info out there about the internal wastegate. i'll let you know how it works out after i put it on the car and run it

 

[supravw]

Do most guys switch to an external setup cause they have to or because they want to is more of my question?? I don't see how an internal wastegate wouldn't work as well as external with the correct size downpipe.

Also what's the going price for HY35s?? I know HX35s are going for between 250-450 in good to rebuilt condition. I can pick up a HY35 for about 200 bucks. Good deal or no?

 

[Ceddy]

14.4psi absolute air pressure (psia) at the inlet.

Oh, sorry I misunderstood. Never saw references to inlet pressure before.

 

[GST95]

You can use the internal wastegate on the stock Holset housings if you plan on running high boost. The hole is only 20mm and the actuators are at least 17psi, AFAIK. The actuators are adjustable if you drill out the lock, but you can only lengthen the rod so far before you are no longer seating the flap. You can only port out the to about 22-23mm with the stock flap. I ended up getting my WH1C to hold down to about 16psi creeping to around 18ish psi at 7k after quite a bit of work, but that is one of the lowest actuators too. Another thing that helped a lot was to radius the outlet flange where it merged with the turbine outlet. Stock it is a sharp 90*.

here is a pic of what im talking about.

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

 

[supravw]

Awesome! Thanks for that reply, just what I was looking for. I'm going to try using the stock wastegate and if all else fails I'll switch to an external setup.

 

[Pirrofab]

I really wanted to go internal gate on my 35x but BEP wasn't making them at the time so I went external. Aren't the internal gates quite hard to get to regulate boost or is that only in the bolt on housings? Since I'm going external its an extra $500+ in most cases when its all said and done.

 

[joyfil2001]

I went to external a while ago when I still had my 18g. It was like night and day. If you drive a car with an external wastegate you will know what I am talking about and never go back to internal. No more creep, no more spike, and it holds boost to redline.

 

[We're on Boost]

HX40/35+E85= So I got the turbo back from Justin. Thanks man.. Here is a log gm 3 bar doesnt read higher than 30psi the boost gauge is showing 32-33 psi.. The clutch starts to slip any more boost than 35psi plus Im out of injector aswell. Link loging 60lbs not bad for the old diesel turbo.. spining the tires rolling into 2nd and the rear end come out is fun!!!

I used dsmmatt's log to estimate the average whp during the last several hundred rpm's of this pull. Came out right around 500 whp. If the number sounds a little low, well, keep in mind it is the average whp from 6466 to 7239 rpm, not a peak number from the top of some little bump in the curve like you would see printed on a typical dyno sheet.

Details are in a post I put here:

http://www.dsmtuners.com/forums/tuning-engine-management/361652-calculating-whp-log-speed-time-physics.html#post152113252

 

[JusMX141]

Aren't the internal gates quite hard to get to regulate boost or is that only in the bolt on housings?

Simply put, the BEP internal gate housings can't maintain boost over 20psi because the flapper and hole are too large, and the Holset housings can't maintain boost under 20psi because the flapper and hole are too small and only pull from one side of the twin-scroll housing.

If you want the most out of one of these setups, going external is a must. The moral of the story is don't be a cheap-ass....you've already saved enough money by getting a 60lb/min turbo for $300 or less (in most cases), so why not spend the money you saved to assure that it will perform properly?

 

[TSimage]

single turbo. hx52 hotside. hx55 cold side. . . the hx55 compressor flows 100lb/min. . . Remember it takes a large hotside to see the potential of a large cold side.

Regardless, we know the hx52 hotside is good enough for 140+mph in the 30s for boost with about the stock weight of an AWD 1g . . . And 90lb/min is plenty of compressor flow for more.

But that's not nearly fast enough.

This is why I am wondering if a complete HX55 turbo comes closer to the specs of a 374/475 B&W turbo.

 

[Pirrofab]

Simply put, the BEP internal gate housings can't maintain boost over 20psi because the flapper and hole are too large, and the Holset housings can't maintain boost under 20psi because the flapper and hole are too small and only pull from one side of the twin-scroll housing.

If you want the most out of one of these setups, going external is a must. The moral of the story is don't be a cheap-ass....you've already saved enough money by getting a 60lb/min turbo for $300 or less (in most cases), so why not spend the money you saved to assure that it will perform properly?

Very true, I just favored how much cleaner and more compact everything is with an internal gate. Im trying to find a cheaper tubular o2 housing and 38mm wastegate for cheap but so far no luck. Then again I can't really do much till i get my tax check in hand