Holset turbo's

[RedBowTies88]

so im quite familiar with Garrett's and Borg Warners but not Holsets,....

looking for an s472 or gt4294 equivalent basically something T4 in the 70mm inducer range.... do they offer one? their site is a little hard to read turbo specs and i can't find any compressor maps

[TalonTsi97]

Hit up assault187, he ran a HX-40 on his 2g dsm for a long time and has good info on the Holset line of turbos.
I'm assuming you just want a cheaper option then the BW line?

[RedBowTies88]

Originally Posted by TalonTsi97

Hit up assault187, he ran a HX-40 on his 2g dsm for a long time and has good info on the Holset line of turbos.
I'm assuming you just want a cheaper option then the BW line?

well, doesn't get a whole lot cheaper then the BW's i can get an s472 for about 600 bucks only problem is its T6 so i would need a housing upgrade which is 200 bucks IIRC from forced inductions.


just wanna be able to weight out all my options before i decide....maybe holset has a nice choice for me that i don't even know about yet

[TalonTsi97]

I def thought BW's were more $$ then that, i see t3 s362's selling for $$1-1200

[RedBowTies88]

Originally Posted by TalonTsi97

I def thought BW's were more $$ then that, i see t3 s362's selling for $$1-1200

well, the s300 units are a bit more then the s400 units in general. but still they're not bad at all.

i dunno if i can get in trouble for this at all but i use this site to reference turbo prices, http://www.forcedinductions.com/productsborgwarner.htm i use them and bullseye

[RedBowTies88]

if i had big bucks i would run a GTX4294 and then when i get the motor rebuilt (after i blow the stock one) i would just compound it with a GT55, or a Phat Basturd Killer

[blackvr4]

hx50 - hx55 would be the closest equivelent that holset makes if you want to be in the s400series range or closely comparable to a gt42. I would say the hx40 would compare to something between a s200 - s300 series borg warner or a gt35-gt40. Hx35 would compare to s200 series or a gt30, 50trim, 60-1 etc.

What car is this going on? if its a 4 cylinder the hx5X holsets are going to be crazy laggy, but I read you can bolt them to a t4 flange.

Good luck with ur search an hx50 can be had for around 300bucks

[RedBowTies88]

Originally Posted by blackvr4

hx50 - hx55 would be the closest equivelent that holset makes if you want to be in the s400series range or closely comparable to a gt42. I would say the hx40 would compare to something between a s200 - s300 series borg warner or a gt35-gt40. Hx35 would compare to s200 series or a gt30, 50trim, 60-1 etc.

What car is this going on? if its a 4 cylinder the hx5X holsets are going to be crazy laggy, but I read you can bolt them to a t4 flange.

Good luck with ur search an hx50 can be had for around 300bucks

dont worry, its a v8 however low rpm spool is important.

so good sir, would you happen to know where i could find a list perhaps with some specs??? like compressor inducer/exducer, comp a/r, turbine sizing and a/r? and specially some MAP charts thanks

[blackvr4]

"Summary provided by wiseman, Dsm-onster:
HX35:

The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

The 7blade hx35 has a 56mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEAM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.

H1C/WH1C:

In 1994, there was the Wh1c which has pretty much the identical compressor as the hx35 but with a Vband compressor cover. The turbine wheel is the same. It will bolt into the BEP bolton hx35 turbine housing. It has 4 bolts at the housing instead of 6. So you will need to buy 2 more bolts and use 6 washers cut to make a flat side. Honestly, I just used bolts that were cut a little short and the bolt head was wide enough to pull the chra to the turbine housing. No sealing issues. Since the Wh1c is for all practical purposes an 8blade hx35 the spool and flow is the same too.

I have the big h1c. It comes on the INTERCOOLED 1991-1993 cummins pickups. It has the webbing for MWE but no groove cut like the hx35/wh1c has. This turbo I term the big h1c because it has a 54mm compressor inducer and same exducer than the 8blade hx35/Wh1c. The other h1c is the small h1c found on the NON-intercooled cummins pickups. This has a 50mm inducer but only 7blades and has no webbing for MWE. Less blades helps flow, but so does a larger inducer diameter. The most whp ever recorded on a gas 4cylinder with the small h1c was done on a KA24 nissan: 411whp. Since the big h1c has a 4mm larger inducer and the same turbine wheel as the hx35, it is safe to say that it flows enough for between 411whp and 500whp. The diesel sources state that it flows SLIGHTLY less than the early hx35. So 4lb/min less than the 8blade hx35 puts the flow of the big h1c at 48-49lb/min right where a 50-trim or 20g is. The small bep housing is all that's needed to get the most from the compressor and the spool speed is 20+psi by 3500rpms.

HX35-40 hybrid:

Keeping the long tradition of the marriage of sportcompact and hybrid turbos, there is the hx35 turbine and the hx40 compressor. It is strongly recommended to use the large bep turbine housing or the stock hx35 turbine housing with an non-divided t3 manifold for this turbo. The small bep housing around a t31 size hx35 turbine wheel is probably not enough to merit any of the hx40 compressor wheel upgrades. 20+ psi by 4000rpms can be seen in the hx35/40 with the hx35 12cm^2 turbine housing with a non-divided t3 manifold. With the large bep housing, spool times are to be determined. But likely similar.

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.

H1E/WH1E:

The Wh1e is like it's little brother the Wh1c. It mirrors the hx40 8blade in every way except that it has a v-band compressor cover and a 4bolt chra-turbinehousing pattern. It will consequently bolt into the hx40 bep bolton turbine housing and this is plenty of flow to max out its 60lb/min compressor.

The h1e is like it's little brother the h1c. There are different size compressors. . . BUT there are also different size turbine wheels too. Check measurements before buying this turbo if you plan on running a BEP turbine housing. There are lower flowing compressors than the 58mm 8blade that are out there. So this turbo may not flow any more than an hx35 if get the wrong one. You need at least a 58mm compressor inducer for this to be a worthwhile turbo vs the proven hx35 or 8blade hx40.

HX52:

This is a big sucker. It is commonly found on the Volvo Semis and usually has a billet compressor wheel. It flows 88lb/min. There is no bolt on housing for it. If you want a bolton housing for this turbo, then you don't want this turbo. In fact if you want a t3 flange turbine housing for this turbo, then you don't want this turbo. You DO want this turbo if you're looking at a gt4294r or gt4202r. The turbine inlet is slightly different than a t4 bolt pattern. You can still get the t4 manifold to work just fine by enlarging the bolt holes."

Compressor maps can be found here. Although I dont see any for the hx52. But seeing that your putting it on a V8 I would say go with the HX50-hx55 since ur only using one turbo. The HX40 might be to small by itself, unless you went twin hx40s that would be pretty nasty.

http://www.dsmtuners.com/forums/turb...d-systems.html

Also I found this


Hope that helps

[RedBowTies88]

Parallel are out the question due to the need for custom manifolds exhaust and intake and a new intercooler which I don't have the money for what I'm currently running is a 64mm Garrett and it's just not flowing enough air for me anymore. So I'm looking into the 68-72ish inducer range. 75 would be too laggy and to take real advatage of one i would window the block. Looking to move at least 85ish lbs/min but of course more is better. From what I've seen on the HX52 (the little I could dig up) was that it's 68mm and uses a t5 flange. I would prefer T4 but if I can make it would so be it. I can't seem to find a MAP chart though which is what I really need to help make a decesion

[knochgoon24]

There are guys running HX52's on DSMs. There should be some info on their setups somewhere on DSMTuners.

[RedBowTies88]

well, from the info ive found it looks like an HX52 is gonna be a little on the small side for what im looking for... and the turbine flange is a little goofy.


am i right in saying that the HX52 is actually larger then the HX55? from all that i can find the 65 is 65mm and the 52 is 68

[assault187]

flow maps and any information you could possibly want or need can be found on DSMTuner.com in the many many Holset threads. Google search Holset dsmtuners and you'll find it.

[RedBowTies88]

Originally Posted by assault187

flow maps and any information you could possibly want or need can be found on DSMTuner.com in the many many Holset threads. Google search Holset dsmtuners and you'll find it.

couldnt find anything searching so i made an account to ask around..


and lo and behold they dont allow you access to the tech section...thats ****ing stupid as hell. i not gonna BS around on a DSM forum to get enough posts to use the tech section Tech is what forums are for

[mitsuboost30]

holset flow characteristics suck compared to newer billet turbos... ditch that idea and just go with a precision or borg warner

[RedBowTies88]

Originally Posted by mitsuboost30

holset flow characteristics suck compared to newer billet turbos... ditch that idea and just go with a precision or borg warner

If you have some compressor MAP charts that show that I would love to see them, however as it is all i getting is hear-say.

no offense


P.S. form what ive heard no telling if its true, but the large frame holsets use billet wheels

[mitsuboost30]

Originally Posted by RedBowTies88

If you have some compressor MAP charts that show that I would love to see them, however as it is all i getting is hear-say.

no offense


P.S. form what ive heard no telling if its true, but the large frame holsets use billet wheels

lemme find some charts

[RedBowTies88]

Originally Posted by mitsuboost30

lemme find some charts

thank you.....

[disstractin_FC]

I have a very accurate chart, one of the best on the internet.



HX35 =

HX40 =

HX52 =

[knochgoon24]

I found you some stuff last night, but then Comcast internet crashed (yet again) so I couldn't post it. The info is there, but it's scattered.

You are correct that the stock flange on it isn't exactly a T4. There's a divided 16cm housing that's close to the T4. You might want one of the bigger T6 sized ones.

Try contacting these people on DSMTuners. They might have a little more info since they're running one first hand.
Maglin - http://www.dsmtuners.com/forums/memb...lin-30288.html
biglady112 - http://www.dsmtuners.com/forums/memb...112-31835.html
b00stedtalon2 - http://www.dsmtuners.com/forums/memb...on2-77222.html

http://www.dsmtuners.com/forums/turb...-part-4-a.html
Also has some HX52 info near the beginning.