What turbo for my VR6/R32?

[RBPE 198]

Holset info;

 

*** I think the smaller AR's are out and seem to vary quite a bit but are usually on the sellers post.

 

From what I can gather, the Holset's from their Huddersfield factory have the blue stickers shown here (left) and the other stickers are the one's made in their Wuxi factory in China. I think anything else is a copy but don't quote me on that.

 

 

EDIT:

Also, to clear something up that bugs me - the Wuxi Holset's will likely be just as good as their UK counterparts as they probably stick to the same QC's as their main factory. All this "if it's Chinese it's rubbish!" nonsense people regurgitate is hear say nonsense, same as any other country but depends on conformity to standards, quality can vary hugely between manufacturers if there is no conformity - it's the main thing I learned when looking into part manufacturing and suppliers from over there.

These are produced for the massive truck market over there, so you can bet Holset don't want to lose tens of thousands of unit's production on poor QC and these will follow their International QC standards at a guess - so only problem is the high boost and turbine side aspects as per below.

 

EDIT: Holsets statements on copies; (might need to ignore stickers then and look at clips and nuts etc according to this)

http://www.myholsetturbo.com/images/holsetcounterfeitprevention.pdf

Edited January 6, 2018 by RBPE

[vdubhead 51]

What would be total approx figure one can achieve from the hx35 on a vr6?

[RBPE 198]

12 hours ago, vdubhead said:

What would be total approx figure one can achieve from the hx35 on a vr6?

 

Most I've dealt with tend to be looking around 450-500hp max on those 12cm HX35's (all crank hp figures for non UK residents reading this by the way). 

On the chart total flow should see you past 600hp (lbs/min x 10) - however in reality there are a number of factors, efficiency of your set up, what turbine size etc so I would say the 12cm is probably good for 500ish hp tops and either larger turbine or start looking into the HX40 past that..

 

There's an old thread here with spool info on the VR6 plus some on the older T series turbo's.

 

 

[RBPE 198]

Also, on a further note; turbine/boost aspects to think about on Holset's;

 

If you get a Holset from a scrap yard, off a truck for example, they can have huge turbine sides (>29cm+) - and getting info on the turbine sides from general adverts like on ebay can be difficult, can be big ones like this, if they are shops re-selling them for the truck markets especially! For decent spool you want to be looking at the 11-14cm turbines, 16's or so for the higher outputs (550-600hp+), which some people do for aftermarket sales, but as most are stock diesel engined turbo's, they can therefore be way bigger!

 

Also, due to the diesel truck market aspects, the wastegate can be set for high boost so when people get them from the scrappers and put them on they get problems as they are boosting 2 bar! Some shops have started selling lower pressure wastegates now and some weld the internal gate shut too due to this, opting to go the external wastegate route. This can also be done for any boost leaks on twin scroll turbines if the wastegate slaves off one runner only for example as some do.

 

So.....if you are hunting at the scrappers (junk yard for our US owners) or are looking at re-sellers that cater for the truck markets, take care on the turbine sides and also boost pressures set!

Edited March 21, 2017 by RBPE

[vdubhead 51]

Is there any online stockists still for the holset turbos after reading that thread I think I will start my build with one of them to begin with before replacing when time is due for a garret

[RBPE 198]

You mean the Wuxi ones? New Huddersfield made one's can be very hard to get a hold of and can often be a similar price to a Garrett! Some alternatives though.

 

From what I can gather there's probably 2 shops on aliexpress selling Wuxi one's, this is one;

https://www.aliexpress.com/item/NEW-GENUINE-HOLSET-HX35-3536338-3539697-6735-81-8400-Turbo-Turbocharger-for-KOMATSU-PC200-6-Excavator/32741369146.html?spm=2114.01010208.3.42.WjGbAm&ws_ab_test=searchweb0_0,searchweb201602_2_10091_10090_10088_10089,searchweb201603_1&btsid=531742a0-ca27-4e6c-8e73-ff0f63f76e2b

 

I haven't had a reply yet on the turbine side sizes on them though so ?????? - I have seen some UK sellers on ebay selling them with good size turbines though, best to keep an eye out on ebay for them. Just look at the stickers on who's selling what for how much.

 

The US has a good selection, they like their trucks over there, but factor in any taxes (was 20% VAT and about 5-6% of item+ postage when I checked years ago). There are a few "modified for aftermarket use" ones which I think Zentrum is re-selling below in the link.

 

http://www.turbozentrum.de/en/turbos-und-komponenten/holset-turbolader/hx40/holset-turbo-super-hx40-14cm2/a-32005/

 

Apart from that and sourcing one through a scrappers, a remanufactured one would probably be your best option, these 2 have been running a while sourcing different ones;

http://www.ebay.co.uk/itm/Turbocharger-Turbo-Holset-HX35W-12cm-T3-twin-scroll-reman-new-/252698800050?hash=item3ad605afb2:g:6TEAAOSw5cNYbjFM

 

None in at mo, but UK based;

http://www.ebay.co.uk/sch/compressor_racing_uk/m.html?item=262823058485&hash=item3d31799c35%3Ag%3AfCAAAOSw9GhYiM4~&rt=nc&_trksid=p2047675.l2562

 

And nowadays, just to throw a spanner in the works, B-W journal bearings are cropping up too! (I'll have to do another graph for those flow rates though )

http://www.ebay.co.uk/itm/Borg-Warner-AirWerks-177280-S300SX3-60mm-A-R0-88-T4-for-320-800-HP-Turbo-/302164339905?hash=item465a65ecc1:g:15sAAOSw4GVYTncI

 

I'll post up if/when I get the Wuxi aliexpress details on the turbine side but any of the others offer a great alternative to the more expensive EFR/GTX unit's.

 

[RBPE 198]

Oh and p.s.

 

If you do go the scrap yard route, there are always alternatives!

 

http://www.ebay.co.uk/itm/Holset-HX40-19cm-T4-twin-scroll-high-flow-turbine-housing-New-and-unused-/262853248602?hash=item3d3346465a:g:S04AAOSwjDZYcPul

 

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.Xholset+turbine+housing.TRS0&_nkw=holset+turbine+housing&_sacat=0

[vdubhead 51]

You mean the Wuxi ones? New Huddersfield made one's can be very hard to get a hold of and can often be a similar price to a Garrett! Some alternatives though.
 
From what I can gather there's probably 2 shops on aliexpress selling Wuxi one's, this is one;
https://www.aliexpress.com/item/NEW-GENUINE-HOLSET-HX35-3536338-3539697-6735-81-8400-Turbo-Turbocharger-for-KOMATSU-PC200-6-Excavator/32741369146.html?spm=2114.01010208.3.42.WjGbAm&ws_ab_test=searchweb0_0,searchweb201602_2_10091_10090_10088_10089,searchweb201603_1&btsid=531742a0-ca27-4e6c-8e73-ff0f63f76e2b
 
I haven't had a reply yet on the turbine side sizes on them though so ?????? - I have seen some UK sellers on ebay selling them with good size turbines though, best to keep an eye out on ebay for them. Just look at the stickers on who's selling what for how much.
 
The US has a good selection, they like their trucks over there, but factor in any taxes (was 20% VAT and about 5-6% of item+ postage when I checked years ago). There are a few "modified for aftermarket use" ones which I think Zentrum is re-selling below in the link.
 
http://www.turbozentrum.de/en/turbos-und-komponenten/holset-turbolader/hx40/holset-turbo-super-hx40-14cm2/a-32005/
 
Apart from that and sourcing one through a scrappers, a remanufactured one would probably be your best option, these 2 have been running a while sourcing different ones;
http://www.ebay.co.uk/itm/Turbocharger-Turbo-Holset-HX35W-12cm-T3-twin-scroll-reman-new-/252698800050?hash=item3ad605afb2:g:6TEAAOSw5cNYbjFM
 
None in at mo, but UK based;
http://www.ebay.co.uk/sch/compressor_racing_uk/m.html?item=262823058485&hash=item3d31799c35%3Ag%3AfCAAAOSw9GhYiM4~&rt=nc&_trksid=p2047675.l2562
 
And nowadays, just to throw a spanner in the works, B-W journal bearings are cropping up too! (I'll have to do another graph for those flow rates though )
http://www.ebay.co.uk/itm/Borg-Warner-AirWerks-177280-S300SX3-60mm-A-R0-88-T4-for-320-800-HP-Turbo-/302164339905?hash=item465a65ecc1:g:15sAAOSw4GVYTncI
 
I'll post up if/when I get the Wuxi aliexpress details on the turbine side but any of the others offer a great alternative to the more expensive EFR/GTX unit's.
 

Thank you

[RBPE 198]

I have had this reply from the shop about the Wuxi one....

 

hi,in this HX35 3539697,There is a NO.12 in exhaust housing intake mouth,and in HX40W have 16 or 17 inside,which one do you need?tks.

 

So - I am taking that to mean 12cm on the HX35 turbine side and 16/17 on the HX40's they sell. Am asking if they do multi-item discounts if any others are interested?

 

Edited February 16, 2017 by RBPE

[vdubhead 51]

Awesome is 16cn for hx40 about right for a vr then still new to this and learning 

[vdubhead 51]

Found a holset hx40 17cm is that to big or is that the right size before I buy don't want to spend twice

[RBPE 198]

On 2/19/2017 at 12:36 AM, vdubhead said:

Found a holset hx40 17cm is that to big or is that the right size before I buy don't want to spend twice

 

Sorry, not been on. Err, 17cm 40 will be like a GT40R 1AR ish so 4krpm's+ for decent boost, good if you want 600+hp though! 

12cm HX35 most likely good for 500 ish hp or so, maybe a bit more, so a 14cm HX35/40 would be one for 500-600hp (all as a base/rule of thumb of course).

 

So take that with the links above and budget as well as goals, when I say 500hp on a 12cm 35 for example, this is just a rough guide, a very efficient set up can yield 100hp more at the same boost.

As a guide, I'd roughly estimate;

12cm - >15-18psi

14cm - 18-26psi

16/17cm - 25psi+

 

However, some may want more lag for drivetrain reasons, or use a big un until they have more scope later on?

 

Idea of spool in the link below too don't forget;

 

 

Edited December 7, 2017 by RBPE

[vdubhead 51]

I was thinking a little lag for drive train reason but would like to be about 500 bhp

[FishWick 21]

They stopped making the GT3582R?   Is it a GTX now?  Such a great snail on my VR6.  Perfect torque band for a road car, which doesn't kick in so quickly it strips the teeth off 5th gear, which is something to consider when choosing a quick spooling turbo.

 

I tried a couple of GT30Rs as well, GT3071R & GT3076R with 0.82 T3 housings.  Both of them were done by 5800rpm.  35R carries on past 6K.  Maybe with a 1.06 housing the smaller units would fair better up top, but it's a lag compromise thing, as is a huge front mount vs air-water cooling.

Edited October 6, 2017 by FishWick

[Narrdo 0]

On 06/10/2017 at 7:20 PM, FishWick said:

They stopped making the GT3582R?   Is it a GTX now?  Such a great snail on my VR6.  Perfect torque band for a road car, which doesn't kick in so quickly it strips the teeth off 5th gear, which is something to consider when choosing a quick spooling turbo.

 

I tried a couple of GT30Rs as well, GT3071R & GT3076R with 0.82 T3 housings.  Both of them were done by 5800rpm.  35R carries on past 6K.  Maybe with a 1.06 housing the smaller units would fair better up top, but it's a lag compromise thing, as is a huge front mount vs air-water cooling.

 

 

Great information in this whole thread. Really is spot on.

 

Im currently building a low boost 3.2 24v, my aim is maximum 375hp due to this been a FWD Corrado running no LSD currently. 

 

Turbos I’m debating are the GT30 range any other people ran low boost with what turbo.