The HOLSET thread!

[R@ddy]

just wondering, does anyone use an oil cooler when these run this turbos? cause i know theyre oil cooled only. my 1st fully built SR died from what looked like oil breaking up, or so says an engine tuner i know..just want to see if anyone uses it on they're motor

[robots]

I dont think its turbo problem. Oil breaking up is either oil temp to high or just shitty oil.or bad luck. I ran oil cooled turbos even with no oil cooler. And the temps were all good. Bad tuning can also result in high oil temps. Check ur shit man. Its suppose to be all good.

[robots]

Got a nice find for you guys !))
I was at my favorite turbo shop and was looking at their holset's range.
Mainly HX35 and found some interesting shit.
Wanted to check the AR on the housings.

Pretty common 12cm on the HX35

And ohh shit. 10cm on the HX35 !!! Although it does look different to other HX35s, smaller compressor and no anti-surge inlet.

[lowrider260]

Nice find! Hmmm, I wonder if that exhaust housing is swap-able with the 12cm one...

[s14>integra]

Has anyone run a holset on a single cam? I'm looking to ditch my Godspeed in favor of something more "not made in china". Im trying to get around 400whp. Would an HX35 get me there?

[robots]

I will try the swap and report to you guys. Not soon though, all the guys here went for holidays. Chinese new year.
After 1st of february probably I could see whats up.

[Chris28]

I'm running an hx30 on my KA, downpipe should be done tomorrow so I'll let everyone know how it feels. Both compressor and turbine wheel are physically larger than the ones on my old t28, I'm aiming for 300whp at around 15psi. If it doesn't work out I'll probably end up buying a friend's hx35.

Here's a link to the SR builds, one guy did an hx30 and one did an hx35. The guy running the 30 on his SR made 325whp/375tq at 19 psi, that's promising for me haha.

Team Launch Holset Power Project

[robots]

Originally Posted by Chris28

I'm running an hx30 on my KA, downpipe should be done tomorrow so I'll let everyone know how it feels. Both compressor and turbine wheel are physically larger than the ones on my old t28, I'm aiming for 300whp at around 15psi. If it doesn't work out I'll probably end up buying a friend's hx35.

Here's a link to the SR builds, one guy did an hx30 and one did an hx35. The guy running the 30 on his SR made 325whp/375tq at 19 psi, that's promising for me haha.

Team Launch Holset Power Project

Please post pics of your Holset HX30, turbine AR size and compressor IN/EX if possible.

Good luck with the build ! Hope for good results !
Though 19psi for 325whp is a little on the high side.
But those torque numbers. WTF?))
375 Torque

[slow92]

Here is a stock s13 sr20det with a hx40 8 blade turbo. Car made 232whp at 7-8 lbs of boost.
Stock sr20det redtop with Holset HX40 / H1E 240sx s13 - YouTube

[JDM SPUG]

i like where this thread is going

[slydin240sx]

Originally Posted by JDM SPUG

i like where this thread is going

Me too! Interesting stuff here....

[Chris28]

Here's a picture I took earlier, downpipe got welded up today and manifold just about done, should be up and running tomorrow. I'll try to find some pictures of just the turbo.



Edit: Found some more pictures. Seems like the hx30's only came with 6cm, so I have a 6cm housing. The hx35 pictured has a 9cm housing, and the hx40 has a 17cm housing. Looks like I might be upgrading to the hx35 soon, but that dyno graph with the SR makes me want to keep the 30 for how much torque it makes. I'll see how it feels tomorrow though, previous setup was 293/310 with a t28 so I can compare it to that.



Here's the tag on my 30, not sure what anything means though.

[kalypso123]

valve cover is murder

[slow92]

Here is a link to a video where an eclipse makes 654 awhp with an hx40.
Holset Hx40 654hp 618tq@40 psi - YouTube

And here is a link to a dsm forum that does nothing but talk about holset turbos and they compare and explain each turbo and there gtxx variant. Really good information for those of you thinking about using these turbos.

Holset Turbos, FAQ - DSM Forums

[Chris28]

I feel like I'm rambling about the hx30, but I just looked up some compressor maps. The hx30 flows more than a gt28rs, and at a much lower pressure ratio, so I don't know where people are getting the notion that the hx30 doesn't flow enough for 300whp. Here are the maps for comparison.





At 15 psi, the KA is right in the middle of the hx30's compressor map. At the same boost level, the gt28rs is almost out of the efficiency range. My friend who is welding up everything ran out of Argon so I won't be able to drive it until probably Tuesday, but I still think the hx30 will be plenty capable of 300 whp.

[robots]

That map is totally not HX30. It states 50+lb/min flow. HX30 can't do that.
Be realistic.

[Bubba]

Originally Posted by kalypso123

valve cover is murder

That...

[shiftdrift]

not really in action atm, but on my 1j vvti i have a holset hx35, twin scroll, v band. 12cm housing. got it for 200 bucks, 0 miles on a rebuild. about to make a manifold for it.

[rb20240sx]

Originally Posted by robots

That map is totally not HX30. It states 50+lb/min flow. HX30 can't do that.
Be realistic.

Sadly it's not the map I wish it was lol. The hx30e is holsets name for the he341 If I'm not mistaken.

[Chris28]

Ahh that sucks. Well I'll run it for a few weeks to see how I like it, if it doesn't feel as good as my previous setup I'll throw the hx35 on.

[kalypso123]

Originally Posted by slow92

And here is a link to a dsm forum that does nothing but talk about holset turbos.
Holset Turbos, FAQ - DSM Forums

score

msglength

[karl wasabi]

I have a Holset HX35 that I was planning on running on my RB20. I have yet to do it, but I did a lot of research. Here are some of my bookmarks for installing on an RB20.

Holset Hx35w Installation In Standard Low Mount Position - Skylines Australia
HX35 On stock RB25 Manifold No Cutting Just Some Welding : RB20DET / RB25DET / RB26DETT Forum
Holset on RB20 notes : RB20DET / RB25DET / RB26DETT Forum
Holset HX-35 Oiling - DSM Forums
The World of Holset TurboCharging - S-Chassis.com
Clint's Garage: Holset HX35 Turbo Install
Garrett & Holset Turbo Users - Your Oil Drain May Be Too Small! - DSM Forums
Rebuilding My Holset HX35 - e30tech.com Forums

[undercoverdjay]

RB25 HX40 with T3 .70 Bullseye power housing here.
Peakboost topmount/Tial 38mm external.
The only thing that makes these turbos at all heavy is the stock housing. Once stripped off and replaced with a bullseye, they're no more heavier than any other turbo I've used.
I'm having my car dyno tuned in the spring so I'll report back with some numbers, but it looks promising.

[robots]

My tyrn to shoot out my bookmarks:
Holset Turbos, RESULTS ONLY (COMPLETE INSTALLED SYSTEMS) - DSM Forums
Holset Compressor Maps
Holset Turbo's - Skylines Australia
Holset Compressor Maps I've scurried up - Dodge Diesel - Diesel Truck Resource Forums
Holset HE351VE VGT Turbo
Holset compressor wheels with sizes:
BAE Turbo Systems Inc. - Holset
TurbobyHOLSET - HOLSET Turbo - Index
hx40 vs gt3076r dyno sheet
VWVortex.com - Holset user thread

[kalypso123]

good stuff in those links :0)

[Chris28]

Yeahhhh turns out I'm gonna sell the hx30 and get a Precision 5431. The hx35 will spool too slow for my liking and the 30 won't flow enough for my power goals. I guess it'd be more suited to a CA or a Miata turbo setup. If anyone is interested I'll be posting it in the fs section here soon.

[lowrider260]

Originally Posted by kalypso123

good stuff in those links :0)

What size is that exhaust housing?! And what kinda spool are you seeing?

[lowrider260]

Found this on eBay. It might solve the spool problem most people have with running an Hx35.

Holset HX35 Turbine housing T3 Garrett 4 bolt or V-band .63 A/R | eBay

[mrslowevoix]

awesome thread. i found this if it hasn't been covered. doing a 1jz build and wondering where the best place to buy a hx35? or is it easier to build one up?


The GT3582R flows approx 61 lbs
Compressor minor/major: 61.4mm/82.0mm
Turbine specs: 68mm w/ 84 trim


-Hy35, flows approx 57 lbs/min
-Hx35, flows approx 60.85 lbs/min
-He351cw (Spools faster than the hx35, but makes the same power) flows approx 60.85 lbs/min
-Hx40, flows approx 70.10 lbs/min
-Hx45 (can't find the flow at this time)
-Hx50/52 or 55. flows approx 99.20 lbs/min
-Hx60 (Notice I didn't say HT60), flows approx 125.66 lbs/min
-Hx82, flows approx 198.42 lbs/min

[slow92]

^^^^
when I was looking for a holset turbo I was constantly checking ebay. There always seemed to be holset turbos for sale on there. Most of them needed to be rebuilt but the kits are extremely inexpensive.