holset turbo??

[osolorb]

i was thinking of upgrading my rb20 a little. has anybody ever put a holset turbo on the rb? i an thinking of this option instead of an rb25 turbo or any other turbo out there. i would like some input on the topic. thanx guys (and girls)

[Cjmartz2k]

RB25 turbine isn't worth the time to bolt it on. For a RB20, go Holset HY35 or HX35. Great spool and the HX should be good up to a little over 400 at the motor. Search though, it's been discussed on here before several time recently.

[TurboSouthAfrican]

i was thinking of upgrading my rb20 a little. has anybody ever put a holset turbo on the rb? i an thinking of this option instead of an rb25 turbo or any other turbo out there. i would like some input on the topic. thanx guys (and girls)

Holset is an absolute great turbo, will handle 45psi no problem. Durability, durability........ can't say enough about these turbo's. I ran one my Merkur XR made just a little over 300 to the wheels but had plenty of turbo left. There are plenty of guys running these on Ford 2.3 turbo. 400rwhp no problem. A little fabrication is required to make it work......down pipe and wastegate. Here is a picture of my old HY35. You can see down pipe need to be cut or welded and waste gate tube needs to be snipped and tapped into. If you are mechanically inclined, not a hard project at all with great rewards.

[lazyboi444]

Man i didn't realize how cheap Holset Turbo's really are.. Never really paid attention to them...Ebay price ranges are like 200's to 500's.. Thinkin i may get one just for now while i got the money and get the supporting mods later....This is like finding a PS3 at the GOODWILL lmao.

[Kansei240sx]

Make sure you find a small enough exhaust housing for these turbos or else you're in lag city.

These turbos run out of capacity around 15-20 psi depending on what model of HX/H1C/HY-30/35/40/ There is. Each model has several different compressors and exhaust housings that have different spool characteristics and compressor maps, with different surge lines.

[osolorb]

will the HX40 also work??

[silviasgp06]

turbosouthafrican

ive heard the larger H"x"35 wont spool until like a little before 4000rpms, how fast did your H"y" 35 spool since its smaller?

[Kansei240sx]

The HX35 can spool up and get going to as low as 3400 rpms and has done just about the same thing if not a 100+- difference on KA24DE's.

The exhaust housing you choose to go with ON ANY HOLSET turbo is one of the main determining factors of how soon and how fast the power comes.

Most people choose the 12cm-14cm exhaust housings.

Im choosing the HX35, because there is a variant of it, and its the largest internally gated holset as far as i know. The HY35 is smaller and runs out of efficiency sooner than the HX.

[tjmhillz]

i know theres one guy with a ka-t on the boards running a holset.. ill try to find out what he posted bout the turbo. i was thinkin bout running one but i had to research about them a lil more..

[Cjmartz2k]

Make sure you find a small enough exhaust housing for these turbos or else you're in lag city.

These turbos run out of capacity around 15-20 psi depending on what model of HX/H1C/HY-30/35/40/ There is. Each model has several different compressors and exhaust housings that have different spool characteristics and compressor maps, with different surge lines.

What are you basing this off of? HX35/HX40's are designed to push like 3 bar and don't even get really efficient until around 1.5 bar (22psi). Also, these things are known for thier great spool. My HX35/40 hybrid makes 1.5 bar by 3800rpm in 4th! I think that's pretty dang good when you consider it's probably making 500-500hp at that boost. I pretty much say WAY the opposite of everything you just said.

[styc]

you running this turbo on a rb20? stock internals?

What are you basing this off of? HX35/HX40's are designed to push like 3 bar and don't even get really efficient until around 1.5 bar (22psi). Also, these things are known for thier great spool. My HX35/40 hybrid makes 1.5 bar by 3800rpm in 4th! I think that's pretty dang good when you consider it's probably making 500-500hp at that boost. I pretty much say WAY the opposite of everything you just said.

[lazyboi444]

No he is running it on his RB25...

[osolorb]

what other hx, hy turbos can i use? what r the differences between hx , hic, h2c

[Cjmartz2k]

Yeah, stock everything (including headgasket) 25. Those H1c and the likes turbines are an older design I think. Not saying they are bad, but when the newer ones are so cheap, why bother. HY's go for like $100. These turbines are SUPER beefy too. Mine weighs like twice as much as my old TO4e. If I had to guess, I would say the HY35, and MAYBE the HX35 would bolt on the stock manifold and actually clear the mani with the compressor. My hybrid won't, I can tell you that for certain.

I'll try and borrow my friends inside mount camera so you can see some spool up times.

[darkstar575]

I just want to know if the hx35 will bolt up...I would love for it to clear the stock manifold...If it doesn't would you need a spacer? Would it also be a smart to use the internal wastegate or modify the manifold to allow an external wastegate?

[Kansei240sx]

What are you basing this off of? HX35/HX40's are designed to push like 3 bar and don't even get really efficient until around 1.5 bar (22psi). Also, these things are known for thier great spool. My HX35/40 hybrid makes 1.5 bar by 3800rpm in 4th! I think that's pretty dang good when you consider it's probably making 500-500hp at that boost. I pretty much say WAY the opposite of everything you just said.

Excuse the 40 part. I didnt mean to write the 40 on that list. the 40's compressor housing is considerably larger and flows much more air. Efeezi on a local forum here had a holset turbo H1C i believe or HX35 and was maxing the power to around 496 rwhp on 15 psi. Increasing boost yielded more tq, but only around 15 more rwhp. So its efficiency started to run slow. That WAS no a KA24DE though.

[BoostFab]

the hx35 is a great match up for the rb20/25. if you don't mind a bit more lag, the hx40 will scream on the top end. don't be fool, these turbo are head-to-head performance against the Garrett's GT series turbos. they are verrrrry durable, you all knew that, from diesel trucks. i'm going to bolt the hx40 to my rb25

I just want to know if the hx35 will bolt up...I would love for it to clear the stock manifold...If it doesn't would you need a spacer? Would it also be a smart to use the internal wastegate or modify the manifold to allow an external wastegate?

yes it will bolt up to the stock manifold. you need to clock the turbo to have it sit correctly.

btw! if i recall correctly the hx35 support around 600cfm which yields 300-400hp
Modified by BoostsFed at 8:21 PM 11/30/2007

[osolorb]

are the h1c, h2c anything like the hx35/40

[darkstar575]

h1c is a bad *** turbo. Thats what efeezi used on his car. Their are different versions of the h1c though. Some are pure **** with inefficient compressor wheels that make little power. Some make bucket loads of power. Only problem is that they are all 89-93 I believe, so a rebuild would probably be a good idea.

[darkstar575]

I'm guessing if you clock the turbo you would need an external wastegate? It wouldnt line up anymore would it?

[osolorb]

i think im going to buy the H1C holset for my rb20

[tjmhillz]

does nebody have a website or more info on these turbos i wanan do some research about them.thanks sorry to threadjack also

[BoostFab]

some specs on different Holset's i came accross a while back.

MODEL_____in/ex (mm)Holset H1D 47/55 -- 1.6-2.0 320 hv 774Holset H1D 50/55 yes 1.6-2.5 340 hv 925Holset H1D/E 50/55 -- 1.6-3.0 350 hv 808Holset H1D/E 52/55 -- 1.6-3.0 380 hv 816Holset H1D/E 54/55 -- 1.6-3.0 410 hv 816Holset H1C/E 54/57 -- 1.8-3.5 450 hv 993Holset H1C/E 58/57 -- 1.8-3.5 500 hv 993Holset H1C/E 54/60 -- 1.8-3.5 520 hv 993Holset H1E 56/60 -- 2.0-4.0 550 hv 993Holset H1E 58/60 -- 2.0-4.0 590 hv 1009Holset H1E 60/65 -- 2.0-4.0 650 hv 1160Holset HX40 60/65 -- 2.0-4.0 650 hv 950Holset HX50 63/72 -- 2.0- 600+ hv 950Holset HX50 67/77 -- 2.0- 600+ hv 950Holset HX55 67/77 -- 2.0- 600+ hv 950Holset HX55 72/77 -- 2.0- 600+ hv 1345
Modified by BoostsFed at 6:32 PM 12/1/2007

[TurboSouthAfrican]

Make sure you find a small enough exhaust housing for these turbos or else you're in lag city.

These turbos run out of capacity around 15-20 psi depending on what model of HX/H1C/HY-30/35/40/ There is. Each model has several different compressors and exhaust housings that have different spool characteristics and compressor maps, with different surge lines.

HY's and HX's will make plenty of boost to 35psi in our little motors. Boost in my truck would keep climbing past 35psi. I have a Dodge turbo diesel and can attest to this, also had a turbo Ford with one as stated before and would pull really hard to 24psi. I know of a guy running a HX putting down 450 hp with rough tune.

Try to find a Holset out of Dodge 2000 - 2002 HY or HX and you will not regret it for the money spent. Hy are from the auto trucks, so housing is a little smaller but still good for some great no's.

Good luck, remember, not a bolt and go deal but once finished you will be raving about this turbo to everyone else.

Larry

[Cjmartz2k]

i think im going to buy the H1C holset for my rb20

Why? It's one of the older ones, and the newer, more efficient HY/HX series are so easy and cheap to get.

[TurboSouthAfrican]

the hx35 is a great match up for the rb20/25. if you don't mind a bit more lag, the hx40 will scream on the top end. don't be fool, these turbo are head-to-head performance against the Garrett's GT series turbos. they are verrrrry durable, you all knew that, from diesel trucks. i'm going to bolt the hx40 to my rb25

yes it will bolt up to the stock manifold. you need to clock the turbo to have it sit correctly.

btw! if i recall correctly the hx35 support around 600cfm which yields 300-400hp

Modified by BoostsFed at 8:21 PM 11/30/2007

Easy calculation for HP output is the CFM of the turbo, for every 1CFM =1HPtherefore if a turbo flow 600cfm it will be more or less 600hp.

I have seen HY's and HX's hovering close and just over the 500 HP range. Here is a set up in Mustang SVO

Chassis type:---- 85 svo full weightshort block mods/compression ratio/displacement: crower billet rods wiesco pistons. Stock stroke .30 borehead/port work/valve size: Esslinger Dportcam specs/degrees adv-ret: 2277 straight upintake/throttle body: 75mm rotated upperintercooler: big nprexhaust manifold: huber headerturbo: hx-35 with split scroll still intact for future usewastegate: 38mm tial wannabeexhaust size: 3inchengine management: sds em-4a/f ratio, total timing, boost:10.5afr/22degrees total/29-30psihp@rpm:----514 hp at 5400rpmtrq@rpm:---- 504 Tq at 4100rpm (stopped the hanging open gate issue)flex plate/flywheel:---- stock heavyconvertor/clutch:---- stage 3 spectransmission:4.03 first tbird t-5rear/ratio/tire type/tire size: 8.8 4.10's micky t dr 235-60-15race weight without driver:---- unknownET/MPH: Best 1/8 mile 7.51@96 Best 1/4 11.5@127mph

This is an old 2v head that came from the Pinto motor, think what can be done with some tuning in a RB25 or 26 for that matter. HX 40 will see 600 easy, you can take that to the bank.

[BoostFab]

i think the hx35 is choking your SVO; holding it back from real power. i think a HX50/55 will really lighten up that car.

what are you running on your rb26 setup??

[TurboSouthAfrican]

i think the hx35 is choking your SVO; holding it back from real power. i think a HX50/55 will really lighten up that car.

what are you running on your rb26 setup??

This is not my car, I was just showing what potential this turbo has. HX35 won't be good for much more but then again, this is a 2.3l motor with a 2v head.

I have a GT42R on my RB26, doubt I will have to upgrade my turbo anytime soon. I would like to see some pics of your 30 motor, where are you located?

[BoostFab]

I have a GT42R on my RB26, doubt I will have to upgrade my turbo anytime soon. I would like to see some pics of your 30 motor, where are you located?

gt42r is definately a good one for the rb26.i wanted to get that for my setup, but couldnt justify the cost of it; so the hx52 for the budget freak (me). my rb30 is in building phase, hopefully tuning by spring time.

what other hx, hy turbos can i use? what r the differences between hx , hic, h2c

stick with the hx35 or hx40 and you will be fine. the hy series has a smaller turbine side vs the hx. the h1c or h2c are old, which being replaced by hx & hy series.

Modified by BoostsFed at 10:06 PM 12/3/2007
Modified by BoostsFed at 9:53 AM 12/4/2007

[silviasgp06]

BOOSTSFEDyou said the hy has a smaller compressor but larger exhaust wheel, in you experience how much faster does it spool than the HX series.