Holset HX35 (12cm) on a 4.0 Rover V8
Discussion
I know turbo topics have been done to death but before placing an order I wanted people opinion on the above turbo for a 4.0 Rover V8 (TVR Chimaera)
From my calculations (after reading up on the subject over the last few weeks - I have never bought a turbo before) It seems like it should be a suitable size and reading about the HX35 online it seems to be a good turbo (and half the price of a Garrett!)
What are your thoughts? Anything I am missing?
http://www.ebay.co.uk/itm/262163423144?_trksid=p20...
From my calculations (after reading up on the subject over the last few weeks - I have never bought a turbo before) It seems like it should be a suitable size and reading about the HX35 online it seems to be a good turbo (and half the price of a Garrett!)
What are your thoughts? Anything I am missing?
http://www.ebay.co.uk/itm/262163423144?_trksid=p20...
t, but not cheap enough to warrant the sJust looked at the listing and that's a genuine Holset . I've bought several from Chris over the last five years and he usually has small batches of half a dozen . I had one of those three years ago and sold it on after a few months as Chris had some 10cm housing hy 35,s . Sold the 12 cm to a mate who managed to Bork the cartridge which takes some doing with a Holset and it was repaired foc ,
I doubt you'll be running huge boost so the Holset won't be working hard .
I doubt you'll be running huge boost so the Holset won't be working hard .
Vixpy1 said:
Laggy and don't make the power .
3076 is a good blower , the latest gtx ones are very good .
I'd think a GT30 a bit on the small side for any 4.0, unless it was a low rpm torquey build.3076 is a good blower , the latest gtx ones are very good .
I'd say realistically the upper limit for a single GT30 would be in the 3.0-3.2 range.
A small GT35 type turbo would be a better option depending on power goals.
If you must use a Garrett, then a small GT35 would be a better bet
Cant comment on the Holset as never used one before but on paper it doesnt look that bad
A basic BW is a fairly cheap and robust unit too
http://www.agpturbo.com/s3-s300-series/
Cant comment on the Holset as never used one before but on paper it doesnt look that bad
A basic BW is a fairly cheap and robust unit too
http://www.agpturbo.com/s3-s300-series/
Cheers guys I will carry on my reading. I don't have my heart set on a Garrett, but I only want to buy once and buy right 
I can get a GT3582r here with a 0.63 turbine housing for £1050 so i guess that is a good starting point to compare from.
I just don't want to buy a £1000 turbo when a £500 will still do the job well hence asking here
I can get a GT3582r here with a 0.63 turbine housing for £1050 so i guess that is a good starting point to compare from.
I just don't want to buy a £1000 turbo when a £500 will still do the job well hence asking here
One of the Holsets will do it, they are very strong reliable turbos and cheap to service/rebuild, It will just be a bit slower to spool. One of the turbo books (sorry don't remember which right now, but I have it) has some Holset compressor maps in it, you'll just have to do the maths.
Don't you want two on a V8 anyhow?
Don't you want two on a V8 anyhow?
Edited by Evoluzione on Thursday 10th December 15:43
AceOfHearts said:
Cheers guys I will carry on my reading. I don't have my heart set on a Garrett, but I only want to buy once and buy right
I can get a GT3582r here with a 0.63 turbine housing for £1050 so i guess that is a good starting point to compare from.
I just don't want to buy a £1000 turbo when a £500 will still do the job well hence asking here
Really...if you want to go to the extreme budget end. The yanks do use these Chinese turbos a lot, and they've certainly improved over many years ago. There is a good range of units too and they do seem to work.I can get a GT3582r here with a 0.63 turbine housing for £1050 so i guess that is a good starting point to compare from.
I just don't want to buy a £1000 turbo when a £500 will still do the job well hence asking here
http://www.ebay.com/itm/CXRacing-T4-GT35-Turbo-Cha...
Genuine BW units arent expensive though, and ebay's global shipping program really cuts postage costs !
http://www.ebay.com/itm/BorgWarner-Airwerks-S360-S...
Same unit with the smaller turbine wheel ( different turbine housing too, but that wont make much odds )
http://www.ebay.com/itm/BRAND-NEW-GENUINE-BORG-WAR...
Edited by stevieturbo on Thursday 10th December 15:43
Evoluzione said:
One of the Holsets will do it, they are very strong reliable turbos and cheap to service/rebuild, It will just be a bit slower to spool. One of the turbo books (sorry don't remember which right now, but I have it) has some Holset compressor maps in it, you'll just have to do the maths.
Don't you want two on a V8 anyhow?
I had thought of twins but since I have this manifold already it seems perfect to chop and weld a flange to Don't you want two on a V8 anyhow?
Single is a bit of a no brainer on a Tvr really . The hx35s I used to run on a 2.0 and 2.3 Saab 4 made close to 500hp at 1.8 bar and it would be 14lb by 3600 rpm . In the unlikely event of any problems the bits are pretty cheap and easy to find as they're on millions of trucks and heavy plant but I had no issues with four different units doing pretty much all track day abuse .
mighty kitten said:
Single is a bit of a no brainer on a Tvr really . The hx35s I used to run on a 2.0 and 2.3 Saab 4 made close to 500hp at 1.8 bar and it would be 14lb by 3600 rpm . In the unlikely event of any problems the bits are pretty cheap and easy to find as they're on millions of trucks and heavy plant but I had no issues with four different units doing pretty much all track day abuse .
Out of interest why did you then change to a ball raced Garrett?I tried all flavours of hx35 apart from a 9cm housing which I couldn't get anywhere and on my 2.3 with mild cams I couldn't get good torque below 3500 although it was pulling but not enough and with the gearing I run I had to dip into 2nd gear at a couple of places like Curborough sprint and blyton park . The garret makes more torque as its spooling and I can pretty much use 3rd and 4th everywhere now . To fair I was paying £450 for the holsets compared to £1696 plus vat for the Owens gt3079hta with steel bearing cage and every option thrown at it so id expect it do do a lot better than the Holset .
mighty kitten said:
I tried all flavours of hx35 apart from a 9cm housing which I couldn't get anywhere and on my 2.3 with mild cams I couldn't get good torque below 3500 although it was pulling but not enough and with the gearing I run I had to dip into 2nd gear at a couple of places like Curborough sprint and blyton park . The garret makes more torque as its spooling and I can pretty much use 3rd and 4th everywhere now . To fair I was paying £450 for the holsets compared to £1696 plus vat for the Owens gt3079hta with steel bearing cage and every option thrown at it so id expect it do do a lot better than the Holset .
Thanks, that makes sense. The Holy Grail of Holsets for about 5 - 600bhp seems to be the very rare HY35, do you know anyone who tried one of those?227bhp said:
mighty kitten said:
I tried all flavours of hx35 apart from a 9cm housing which I couldn't get anywhere and on my 2.3 with mild cams I couldn't get good torque below 3500 although it was pulling but not enough and with the gearing I run I had to dip into 2nd gear at a couple of places like Curborough sprint and blyton park . The garret makes more torque as its spooling and I can pretty much use 3rd and 4th everywhere now . To fair I was paying £450 for the holsets compared to £1696 plus vat for the Owens gt3079hta with steel bearing cage and every option thrown at it so id expect it do do a lot better than the Holset .
Thanks, that makes sense. The Holy Grail of Holsets for about 5 - 600bhp seems to be the very rare HY35, do you know anyone who tried one of those?The whole range of hx hy are very similar on the comp side it's the exhaust housings that vary with the smaller 12/10 and 9cm used on the Cummins fitted to Dodge Ram type trucks from what I've seen , I've made 450-480 with all the holsets at 1.7-1.8 bar on v power and stock engines .
AceOfHearts said:
There is one on eBay for about £500 at the minute. From looking online though it seems the exhaust size will be too restrictive for a V8 and is good up to 2.5l only.
I wouldn't get too hung up on the size as it was designed for a 6-7 litre diesel running 13 psi all day long . As your limited by the compression ratio and strength of the std internals you won't be anywhere near the limits of what it can do and with a 45-50mm external wastegate it's not going to be restricting anything . No doubt lots of other turbos will do the job but that 12cm hx is perfectly useable for what you want Forums | Engines & Drivetrain | Top of Page | What's New | My Stuff