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Holset Hx35 Turbo

gkenshin

By gkenshin,
in Engines & Forced Induction

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Benny123r33 Contributor

Benny123r33

Posted
Posted (edited)

Those are for Diesel school buses. They are not effective for high performance petrol in today's standard.

a lot of people would disagree with this comment,

these turbos are very successful in nz,

don't see many garretts doing this

https://www.facebook.com/255636937679/photos/pb.255636937679.-2207520000.1419299298./10152326460922680/?type=3&theater

Edited by Benny123r33
zebra Grand Master

zebra

Posted
Posted

a lot of people would disagree with this comment,

these turbos are very successful in nz,

don't see many garretts doing this

https://www.facebook.com/255636937679/photos/pb.255636937679.-2207520000.1419299298./10152326460922680/?type=3&theater

Whilst the curves look good (just spend an hour going over his facebook page)

They all seem to fall over at 5000-5500rpm on a small motor.... gives most of the results I saw a 2000rpm powerband at best.

So bulk midrange is great for a lot of guys. but for me, having to shift up at 5000rpm on a motor that revs to 7500 would annoy the shit out of me,because I'd go from having 400kw to >200 after every gear change

  • 6 years later...
Lithium Grand Master

Lithium

Posted
Posted (edited)
On 18/05/2014 at 9:38 PM, Lithium said:

Not true, there are Holsets which perform very well on performance petrol motors- you have to get the right combos but there are varieties of HX35 which have been used very successfully on RB25s- I very nearly bought one instead of the GT3076R, only reason I didn't was I at the time figured I didn't want an external wastegate/aftermarket manifold setup.

Thought I'd randomly bump this thread because of a strange unfolding of events.

As I implied here, a Holset HX35 was my "first choice" for my R33 GTS25t but at the time it was not so easy or cost effective to get an aftermarket exhaust manifold which would suit my needs and I was kind of interested in seeing what I could do with the IWG GT3076R and had quite a bit of fun with that.   When I decided to move on from the car I sold the GT30R setup to a mate and reverted the car to a stock turbo before selling.

Some time down the track the new owner of my car asked about it and was thinking of replicating what I had done, and I mentioned that I probably wouldn't do the same now as I hated the IWG setup - and after a mix of "things falling into place" etc he ended up doing the setup I would have done in the first place.   There are aspects of this setup which are better than what I had (ID1000s instead of Nismo 555cc, G4+ Link controlling everything instead of V5 Link and Apexi AVCR, GReddy intake manifold and Sinco exhaust manifold instead of stock manifolds, and a NZ Wiring cam trigger setup) but other than the ECU and injectors everything else would have been doable at the time I did it back in 2006. 

We didn't push it especially hard, it runs the smaller T3 undivided exhaust housing and I was starting to see hints of climbing EMAP - the aim was a responsive 300kw @ hubs on 98 so we called it a day at just over 310kw on 20psi.   The wastegate opens around 3300-3400rpm, and the thing basically drives like a stock turbo.   I've mapped target boost against throttle angle and if you're over 3500rpm then the target boost and actual boost track almost like it's an NA style log, the thing would have murdered my old GT3076R in terms of response and made a good 20kw @ hubs more.

Kinda makes me wish I did go the Holset in the first place, and really I think even though it is using an old "truck" turbo the result still stands up pretty well for things making this kind of power on 98.

image.thumb.png.df6d755a9c5c9682357e51d2372a0843.png

 

Edited by Lithium
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