Holset Turbos,worth using?

[D_BLOCK]

I've been given a Holset turbo, model Hx40,assy=3538353.
Now it came off a cummings 6 cyclinder diesel firepump,but its not marked cummings as it probably should be,being the original turbo.Most of my research leads me to the Rotary boys,and they seem to talk it up.But once again is it worth using in our piston powered cars?Is it laggy,does it die out early up top etc..

If anyone has any info i would appreciate it.At this stage the mate that gave it to me said If i can utilise it ,I can keep it,if not give it back and it will replace a faulty turbo on another pump elsewhere.So no worries either way.

Cheers guys.

[D_BLOCK]

so no ones used it?

[OBSSED]

Not sure if this is a great help but may be of some use

A mate of mine built a R31 drift car and used a Holset turbo, he built it and tuned it himself. From what I saw it pumped out some good numbers on the dyno. Not sure exactly how it behaves in terms of lag, response etc and he's using a HX35 so I'm guessing its slightly smaller than what your looking at but it seems to do the job

I can PM you the link to his build thread, it's on *********** and maybe if you keen you could drop him an email with a few questions. I'm sure he would be happy to help

Won't let me post up a link as I have under 20 posts or something like that

[D_BLOCK]

Not sure if this is a great help but may be of some use

A mate of mine built a R31 drift car and used a Holset turbo, he built it and tuned it himself. From what I saw it pumped out some good numbers on the dyno. Not sure exactly how it behaves in terms of lag, response etc and he's using a HX35 so I'm guessing its slightly smaller than what your looking at but it seems to do the job

I can PM you the link to his build thread, it's on *********** and maybe if you keen you could drop him an email with a few questions. I'm sure he would be happy to help

Won't let me post up a link as I have under 20 posts or something like that

yeah mate i would def be keen to read up on your mates build.The HX35 is a slightly smaller unit from what i can gather on the rotory forums,but as allways it depends on the application.And there lingo, 13b this and bridge port that is another language all together.Try to pm me the link if post count allows or mail me at cybapyr8 @ yahoo . com
The next question would be ,if the Turbo is usable whats a typical rebuild cost?It has a million coats of fireproof red lol and has slight wear in the houseing where the blades are ment to "miss" the inside wall.I have found service rebuld kit numbers and if its feasible to do it myself i will,but if its just few bucks more i will let the professionals hit it.

cheers,
Jas

[dante]

Mate, using a Holset HT3B 76mm turbo on my blow thru set-up.

http://i122.photobucket.com/albums/o262/sinista54/KGrHqYOKpkE0UrYTb2-BNYLEe4Igw_12.jpg

[OBSSED]

yeah mate i would def be keen to read up on your mates build.The HX35 is a slightly smaller unit from what i can gather on the rotory forums,but as allways it depends on the application.And there lingo, 13b this and bridge port that is another language all together.Try to pm me the link if post count allows or mail me at cybapyr8 @ yahoo . com
The next question would be ,if the Turbo is usable whats a typical rebuild cost?It has a million coats of fireproof red lol and has slight wear in the houseing where the blades are ment to "miss" the inside wall.I have found service rebuld kit numbers and if its feasible to do it myself i will,but if its just few bucks more i will let the professionals hit it.

cheers,
Jas
Hey Jas

All good questions, most of them I can't answer but I know he rebuilt his turbo by him self. Purchased a rebuild kit and put it together him self and it seems to be going strong, so far on 18 psi from memory

He runs his own mechanic shop and does his own tuning and building so he may be able to help you out in terms of sourcing a rebuild kit and putting it together for you, don't imagine it would cost a great deal but again maybe best to speak with him

Tried to PM but can't with my post count, will email you the link now so have a look. I think in his signature on the forums its got his contact details as well so that would be a start

Thanks

[planetdavo]

My purely "theory based" initial thoughts are that you would be using a turbo designed for a low revving diesel engine on a much higher revving petrol application.

[Xjas]

My purely "theory based" initial thoughts are that you would be using a turbo designed for a low revving diesel engine on a much higher revving petrol application.

Thats one of the reasons why it works ok, a turbo only sees air flow volume and pressure not engine size, if you take a 15 litre diesel spinning at 2000rpm (assumining the same volumetric efficiency) it should flow roughly the same amount of air as a 5 litre petrol spinning at 6000 rpm. A turbo from a big diesel wont be a perfect match (diesel turbos tend to have larger exhaust wheels/housings to control EGT temps) it can be made to work, Jake Edwards from Canberra had a yellow torana with a Holset turbo on a holden V8 that made over 700rwhp.
The main problem with diesel turbos is the lack of compressor map and other spec so you have to kinda guess, and you cant make small tuning changes to the turbo as there aren't may differenent housing options for a given diesel OEM turbo.
I put a turbo of a Cat diesel bobcat on a Daewoo Lanos just for a bit of fun, it worked very well and went like a rocket compared to stock.

[D_BLOCK]

Thanks guys,some good discussion coming so far out about these units.
if i havent mentioned it,I am a total novice when it comes to turbos but when i get a thought in my head i research the hell out of it (been told thats OCD lol).Hell, it took me 5 months to decide on what profile cam to get.

Now ,those out there that have gone Turbo, have you ......
A.Sourced a complete kit and DIY it.
B.Sourced the parts seperate,DIY it.
C.Had a shop do all the work
Those that chose B. would you you do it again and were there any savings made?
Last quote i had was for around 11K drive in/drive out complete intercooled system thru to fuel system, so if i can come in way under that just by doing the leg work myself then all the better.

Jas.

[D_BLOCK]

I put a turbo of a Cat diesel bobcat on a Daewoo Lanos just for a bit of fun, it worked very well and went like a rocket compared to stock.

That must have been a hell of a lot of fun.I can see it now pulling up at the lights next to some wannabe lol

[Xjas]

That must have been a hell of a lot of fun.I can see it now pulling up at the lights next to some wannabe lol

It looked totally stock, dents and all, its was not the fastest but definately one of the most fun cars I have ever owned, car owed me $1100 when I sold it, turbo was one I'd put together out of several failed warranty turbos, the intercooler was cut down from a freightliner core that came from the scrap bin, made my own rising rate requlator from an old wastegate, really enjoyed building it, only thing I wanted to do to it but never got a chance was to build a Megasquirt ECM to fit to it.

[planetdavo]

Just make sure if you go ahead that you don't risk lunching an engine by trying to save a few dollars doing a conversion hardly anyone knows anything about.
Xjas, wouldn't lag be massive, based off your reply to my post?

[Xjas]

Just make sure if you go ahead that you don't risk lunching an engine by trying to save a few dollars doing a conversion hardly anyone knows anything about.
Xjas, wouldn't lag be massive, based off your reply to my post?

Very true about being careful not to lunch an engine, a poorly done turbo set-up could do that in seconds.

I think lag would depend on the turbo you choose as with any turbo choice really, when you buy an off the shelf garrett the dealer can give you a good idea what will work and what wont based on their experience and the infomation garrett publish about their turbos, when you use an OEM turbo from a diesel you are really taking a best guess based on what info you can find on other peoples conversions or from really good turbo specialists, or you just fly in the dark yourself and hope for the best (my favorite way, its the learning I love rather than the result). I would think the main difference with a diesel turbo thats in the ball park would be... say your engine stock makes 450hp, add a diesel turbo thats roughly the right size you may make 650hp, had you gone all out with the lastest greatest ball bearing garrett you would have got 750hp, you would make more power with the right parts but you would still make plenty of power with the diesel turbo but for less $$$. Like they say "Speed cost money, how fast do you want to go?"

BTW as far a the learning part goes "Maximum boost" by Corky Bell is a great book about turbos.

[D_BLOCK]

Thanks guys, all info has been taken onboard.And your right Dave i would hate to be the guinea pig in this experiment and have it turn to shyt,i wouldnt be impressed at all. so my mate can have this Turbo back i think.
See my original plan wasnt even going the Fi route,i had a long 408 lined up from the states but as my luck would have it,the missus super6 vx is on its way out so she now needs a new DD for the kids etc..
So since this Turbo was free i thought i would give it a shot,oh well no worries.Time to start trawling threads on value for money complete DIY kits that you guys are using, and if its a cheaper option than the 408 still.
Xjas thanks heap mate,youve given me alot to think about and im going to hunt down the book you mentioned.

cheers guys :goodjob:
Jas