The HOLSET Thread

I read that Sam, didnt realise was in this thread though!

Stav, cool man, Im not going for mental power yet as I feel no need for it but Id like to see a bar out of my stock sr with T28 just for shits and giggles really. My aim is realiability at the moment but im not getting far with that haha! cheers for the info though
 
Sam i'd like more info on it also, I bought a hx35 and .55bep housing a while ago, just Jon and Scott finished it and after looking at there map if performed (lag wise not how it spooled) pretty much the same as a 3076r (on coming boost time) which was the same as my 3037s hks which is what I didn't want as it felt to laggy.

this is the problem im having atm 1jz etc spools hx35's fine but sr's (stock 2.0 stock bottom end) don't really seem to?

everyone would love a holset that on boost in the same regions of a 2871r/3071, Sam are those figures without nos?
 
Yes, he got the 385 with no gas. Sam got 430 something with a little bit of gas too. But so would turning the boost up a tiny bit.

When it comes down to it, a HX35 is a 600bhp turbo, and no 600bhp turbo is going to spool like a 2871. But you do get a lot of power at low boost.
It's been proven on other 2ltrs you can have a HX35 with a 12cm twin scroll at full boost by under 4000rpm, but it needs a proper manifold/downpipe/etc, not some hashed together shiz like most do.

A HY35 is good for more power than a 2871 too (as it's basically a HX35 with a smaller turbine wheel and housing tbh). Lots of variations, there are versions with smaller turbines than Sams for even quicker spool, but smaller your turbine the less power you make for the boost.

My turbo (which is a HE341, but similar to a HY35) hits 1.5bar by 4000rpm on my RB20 (supposedly the worst 2ltr ever for spooling turbos), and while the 2871 thing that was on it before makes a tiny bit more boost sooner, for every bit of boost the Holset feels way stronger, meaning from about 3k its faster regardless of what the gauge says.
 
Stavros said:
Yes, he got the 385 with no gas. Sam got 430 something with a little bit of gas too. But so would turning the boost up a tiny bit.

When it comes down to it, a HX35 is a 600bhp turbo, and no 600bhp turbo is going to spool like a 2871. But you do get a lot of power at low boost.
It's been proven on other 2ltrs you can have a HX35 with a 12cm twin scroll at full boost by under 4000rpm, but it needs a proper manifold/downpipe/etc, not some hashed together shiz like most do.

A HY35 is good for more power than a 2871 too (as it's basically a HX35 with a smaller turbine wheel and housing tbh). Lots of variations, there are versions with smaller turbines than Sams for even quicker spool, but smaller your turbine the less power you make for the boost.

My turbo (which is a HE341, but similar to a HY35) hits 1.5bar by 4000rpm on my RB20 (supposedly the worst 2ltr ever for spooling turbos), and while the 2871 thing that was on it before makes a tiny bit more boost sooner, for every bit of boost the Holset feels way stronger, meaning from about 3k its faster regardless of what the gauge says.
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Yeah I totally understand but hx25's wont get that far will they? what rear housings do they use? and could you not use a hx25 turbine with a hx35 comp housing, and a hy 12cm rear?

the he341 I think was what Juhan Rintanen was talking to me about a few years ago? Or was it a he221 or something Stav it was you who was going to sell it me lol, he ran 2 on his old 2jz making 700bhp, wonder how 1 would perform on a sr, if people have 1.2 bar@ whatever if you've got dyno graphs post them up as it would help loads

lol I thought we had this conversation before

http://www.driftworks.com/forum/eng...nyone-got-experience-holset-he351w-print.html

Ahh just read that hx25 to small... Sam from your hx30 are they pointless?
 
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HX25 turbine and HX35 compressor = massive backpressure and compressor surge.
A 250bhp turbine and a 600bhp compressor makes no sense.
No such thing as a 12cm HY rear either, biggest HYs go is a 10 like Sams I think, HXs start at 12. Not interchangable either as turbine wheel is smaller on a HY.

Juha ran 2x HE221s, which are basically HX27s, on his 2JZ, now runs a single HX40.

221s, 27s, and 30s are all 350-400bhp turbos when pushed properly hard. But pushed hard means 2bar+

Simple fact is if people want to run 1.2bar and stuff and expect good power you will need to run a big turbo, which is be not half as responsive and torquey as a smaller one running more boost for the same power.

You can't have it all, give and take.
 
shame no one has dyno results for a he221 on a sr, do you have any for your he341 on the rb?

awaiting Sams haha
 
I will have soon as it's back on the road as it will need to go to Protuner for mapping.

Seen HE221 results on XEs and Volvo T4s, which are both 4cyl 16V, but not SR.
Going by what power you're after and the boost you're on about running a 221 will be way too small for you anyhow.

Sounds to me like you're after GT2871 type results, so why not buy a GT2871? lol
 
Stavros said:
I will have soon as it's back on the road as it will need to go to Protuner for mapping.

Seen HE221 results on XEs and Volvo T4s, which are both 4cyl 16V, but not SR.
Going by what power you're after and the boost you're on about running a 221 will be way too small for you anyhow.

Sounds to me like you're after GT2871 type results, so why not buy a GT2871? lol
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lol because there a rip to rebuild, id rather find a well fitted plain bearing turbo for a sr if not holset probably td06 20g..

But saying that td06's are a little laggy on sr's so maybe td05 18g... or t518z..

Id rather go 1jz than buy a bb turbo again and fit a hx35 or td06 25g or t67.
 
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Gymbob said:
lol because there a rip to rebuild, id rather find a well fitted plain bearing turbo for a sr if not holset probably td06 20g..

But saying that td06's are a little laggy on sr's so maybe td05 18g... or t518z..

Id rather go 1jz than buy a bb turbo again and fit a hx35 or td06 25g or t67.
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Stop writing random numbers and letters..
 
quality thread this :) enjoyed the read

stav - you have a good knowledge of holsets fairplay and turbos in general, handy guy to have on the forum
 
the biggest of the hy35's you came down and collected had bigger housing than the 35 on sams car.i tried a few of them on and the hit the cylinder head
IMAG0378.jpg


IMAG0379.jpg

ha, i just noticed a crack.


sam you are a plonker and should take pictures of the graphs.

the hx30 was a nice little turbo came in early and felt like it pulled all the way to the redline unlike a stock t28 that tails off after about 5k. i was tempted to have it and stick it as a bottom mount as i cant be fucked with all this top mount crap.

wish i had built the uz turbo now hahaha.
 
Took it to a local rolling road. Didn't really trust their rollers much so turned gas off and turned boost down to 1 bar.
Graph:
405714_10152522621595650_1449479880_n.jpg
 
that looks pretty good to be fair, is it just a t3 mani not divided? and does the exhaust housing hit the rocker cover as on scottys hx35 he had to cut into it lol
 
just the usual tit for tat top mount manifold.sams exhaust housing was different to all the other ones ive seen and was a touch smaller where it fouls the head.
tbh those top mount manifolds are wank and sit the the turbo at a stupid angle to the engine meaning you have to make a down pipe with loads of stupid angles in it.
 
Gaz- the ones I had were he351s, good for best part of 700bhp, not hy35s like sams. His is the biggest hy35 you can get.

Bob- no hy is divided so no fancy mani.

Sam- maybe better to describe the rpm it spools up on the road than just a graph as turbos tend to spool later on dyno than road.
 
good info on the thread,just to add hx27 is the same core as a td04 ,i have one here with the 19t compwheel fitted [46mm inducer] and t28 flange
 
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