Lots of info over on Tuners.

HX40:

The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.

http://www.dsmtuners.com/forums/turbo-system-tech/371627-holset-turbos-part-8-a.html
http://www.dsmtuners.com/forums/turbo-system-tech/362444-holset-turbos-faq.html
http://www.dsmtuners.com/forums/tur...o-system-tech/313476-holset-turbos-results-only-complete-installed-systems.html

I'm thinking about an HX40 on my car so I'll keep my eyes on this thread.

 

^^^ great info

 

Thanks for the info. So I bought a HX40 last night. I'm so excited, can't wait for it to get here. Will be doing a rebuild on it but still, I'm pretty freaking happy.

 

I was lucky and I got a BNIB one for real cheap. Also bought a dsm flanged BEP housing, just need to figure out oiling lines and what not.

 

just need to figure out oiling lines and what not.

I know there is great debate on this. I did -4 feed from the head and -10 return and had zero issues with mine. One year and about 2500 miles on it.

 

You need a big return line on these things. -10 is what most people use IIRC. There's talk of it on Tuners too.

As for the feed I'm not sure but I think it was discussed in one of those Holset threads.

 

Ok cool, I will be doing a lot of searching.

 

A -10AN return is not even close to being as big as Holset specifies, but some guys are using them without problems. If you're going to use one, you should "funnel" the drain hole in the upper flange so there isn't such a drastic change in size between the hole in the cartridge and the hole in the drain flange.

You should be feeding from the filter housing to keep the pressure within Holset's spec- however you may need a restrictor to keep from over-oiling the turbo....especially if you're using a -10AN drain which is half the size of what Holset recommends. The oil cannot drain properly, so you must compensate through the feed line size.

These turbos were fed with a -6AN feed line and an oil drain the size of a fire hose on their original Cummins applications. Obviously when you cut the size of the oil drain in half you'll also have to reduce the oil feed size as well even if the pressure remains within spec or you'll have oil running out the seals because it cannot drain properly.

 

What is the drain size that Cummins specs Justin?

 

Information taken direct from the Holset service manual for the HX35/40:

Oil return pipes are permitted 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 drains 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.

Lots of good reading here.

 

19mm converts to 3/4" or a -12 fitting.
Thanks for the link!

 

what the diffbetween the hx40 and the super hx40

 

what the diff between the hx40 and the super hx40

Im pretty sure the 'Super' HX-40 and the HX-40 'pro' are the same thing. If so, this is the 60mm version. Im pretty sure these came in 6 and 7 blade variants.

All the others are just called HX-40. Very few have 56mm wheels, which are mostly 6 blades and most are 58mm which have 7 and 8 blades.

 

HX40 has 8 blades and the super has 6 to 7 blades. Thats all I really know.

Edit: Another note, rule #7.

 

I wish Justin would make these lines and sell them!

 

The oil lines? I wish he would too, but I'm going to experiment next weekend.

 

IIRC the Pro has a billet wheel, think HTA.
Look at the links I posted in the first page.

 

So a punishment racing o2 is'nt a direct bolt on? If not Im in trouble!

 

Ive never used with a DSM flanged BEP housing but I would say it will be a bolt on affair for you. Certainly the o2 housing will be. Just hope it bolts up to the downpipe.

 

Why would'nt it? Because of the hotside being wider?

 

Edited, extremely dumb quesion.

 

Oh no, no easy outs lol. Mike post some pics of what your up to!

 

I will get some up tomorrow.

 

I will be getting my BEP dsm housing in Tuesday I believe.

 

I will be ordering one next week or so.

 

Nice man, it will be cool having a fellow dsmer doing the same setup at the same time.

 

Great, a DSMer in my area.

 

That poor guy...lol.

 

I'm down, all the DSMers I know are in TJ.

 

That sucks. I cant go there

 

Lol why not?

 

Military.......