1jz vvti turbo choices?

A HY35 would be perfect for what you want

 

For those power levels i'd be going HX40 if you can find one/get one specced with a T3 rear housing. HX40's, & parts for them, are becoming a lot more common these days. in saying that, a fresh Compressor Racing HY35 would be my second choice

The whole Garrett vs Holset/BW thing comes down to a couple of factors. Bang for buck you can't beat a secondhand Holset. They've replaced the old "T3/T4" you used to see on every budget-conscious build. Even new ones via Compressor Racing are still the go-to for most applications.

Borg Warner EFR seems to be the flavour of the day in competition drifting these days where budgets aren't unlimited.

However Garrett still have their place. They appear in builds were people need 100% confidence in a brand & comprehensive aftermarket support because they're unsure of what they're doing/have low confidence in their own mechanical ability/have the unlimited budget.

Personally, I'm a JDM fanboy and wanted an HKS turbo, but new was out of reach as i'm on the budget-conscious/DIY end of the scale. So i went with a secondhand HKS GT2540 with RB turbine housing but with rebuilt and up-specced internals to make it the same as a 2871. Came in at the same price of a Compressor Racing HY35, 1/3 the price of a Garrett GTX2871R and was as close to a bolt up combo as i could get (short of going "high flowed" stock turbo)

So figure out where your budget is at, what your priorities are and see what solution slots in

 

Look at the Borg Warner SX300 range, they're cheap and have Borg Warner technology. Got a friend running one on a 2jz running 440BHP at a bar of boost.

 

I honestly think a HX40 is too big for what you want. I assume your manifold is single scroll, correct? a 10cm HY35 will be spot on if so - been done loads of times and the results have always been awesome. Most all hit full boost by about 3000rpm and pull strong till redline, making 400-500bhp.

Martin Wonnacott's HY35 on a 1J, for example. 460bhp, 500lb/ft and full boost by 3000rpm. 1.5 bar, I believe. Look at the torque curve - flipping awesome! He ended up with just over 500bhp later on with some tweaks here and there, which I can't remember off the top of my head or find what they are right now. Think it might have been cutting down the turbine housing and switching to a larger downpipe.



Another example done right, albeit with an RB26, but still gives you an idea - note the comment about the HX40, too:

Ben covered the brand differences well, but I want to add that loads of Garretts tend to have undersized turbine wheels for the compressor wheel size, which isn't great. BorgWarners and Holsets are much better in this respect. If you wanted to run a Borg, would look at the S200 range - S300 frame again too big IMO.

 

@Nite_Shayde - all valid points. However the HX40 comparison doesn't mention it's turbine housing size, did you know what it was? Either way, agree an HY35 is a great option, just getting harder to find compared to HX40's

@Zammish24 - what are you going to be using it for? And what rear gear are you going to use? You don't want a tonne of boost hitting too low in the rev range, that's a recipe for mashing bearings. Yes the response is amazing, but with a longer (ie lower ratio number) rear gear, you end up loading the engine more. If you run a shorter ratio rear gear the engine has less load on it in each gear so it helps ease the high boost/low rev bearing problem, but doesn't fix it. Something to consider anyway

I guess what I'm trying to say is make sure you have top-notch boost control when dealing with those power levels on stock bottom ends. Don't go for over 1.2 bar under 3500, stick around the 1 bar mark, then ramp it up to whatever your injectors can handle higher up. 1 bar is still a massive kick in the pants down low anyway - 1st gear is useless in my car now at anything above 2/3 throttle, and 2nd will spin as soon as it reaches full boost at WOT. 3rd hauls like a train on motorway on ramps but any kind of moisture on the road and it'll step out.

 

Quote from the same fella:

Agree HYs are anything but easy to find nowadays. To be honest, a HX35 would be ok as well. Just looked at what Compressor Racing have listed right now, and they have an 11cm HX35 that's nice. If it was a twin scroll mani a HX35 would be a no-brainer; similar spool but more top end/power and less backpressure than a HY35. But even on a single scroll mani a HX35 won't be a slow spooling turbo at all on a 1J. Maybe ~500rpm later than a HY. Much easier to find than a HY, though.

I actually have a very nice spec HX40 with the smallest turbine housing you can get (T3 14cm) which I'm currently selling, but I maintain it's just larger than necessary for 'only' 4-450bhp on a 1J. But good question about what the intended use is.

Greg @ Protuner has probably mapped a ton of 1JZs, RB25s, etc, running Holset turbos. Wonder if it would be worth shooting him an email to see what he has to say on the matter. Mapping is of paramount importance, obviously, to the reliability and performance of a turbocharged car. And Greg does it well, btw.

EDIT: Just seen in another post this is used on track? Would just get a HX35 in that case. Still easy enough to find - just have to be quick as most don't hang around. Would prob just buy the one from Compressor Racing, but even a 12cm one would be fine. Know someone with a few used 12cm HX35Ws (internal wastegate version - just have to weld the flapper shut) for a good price if it helps.

 

@Zammish24 what gearbox is in it? R series or BMW conversion? (can't remember seeing a build thread / insta iirc sorry)

A 4.1 rear ratio is a nice short ratio for an R series box so no issues there if it is. A short ratio for an R series is 3.9 and above.

I think @Nite_Shayde covered it nicely though: HY35 if available, HX35 as second option and HX40 as 3rd cab off the rank

 

Interesting! Don't see many done like that

Would be keen to see more on it so if you've documented it anywhere let me know

 

Interesting, someone is building a 13B powered E30 (!) with what looks to be a HX55, and is shooting for 600hp with the RX-8 box. He says the box can take the power/torque, mentioning that it's how stuff is mounted that matters.

This looks good, but it's from China and will end up being quite costly if you get hit with import/customs fees etc. Unless the seller marks it as low value when shipping.

https://www.ebay.co.uk/itm/NEW-HOLS...MMINS-EAA-3-9L-10CM-Turbocharger/113709171955

Holset do have a manufacturing plant in Wuxi, China, so not all Holsets from China are a copy. That one is actually tagged as being made in the UK in Huddersfield anyway, though. The one you linked to is deffo a copy.

They are more common in the US as well, so could import, but import fees again may cause issue (as well as the cost of shipping itself). Just have to wait for one to pop up, really. Also keep an eye out for the RS341, which is Compressor Racing's own version of the HY35, and the HE341, which is basically a newer HY35. All still rare, though.

 

Fair play. To be honest, I've read mixed opinions about the FD box itself (being used in the FD with the 13B), especially 3rd being stripped, even at moderate power levels. But some seem to run 5-600 no issue. I guess we don't properly know what condition these boxes are in now since they are getting old and don't know how they were used in the past, etc. You'll deffo have a fair chunk more torque at your disposal at 4-450 with your 1J compared to a 13B running similar power, so I wonder how it will hold up. Anyway, not trying to shit on your parade of course, just thought it was worth mentioning!

That HX35 looks good, ask the seller what size the turbine housing is. It'll be a number stamped into the mouth of one of the twin scroll inlets on the turbine. Btw, if you end up running a turbo with a twin scroll turbine, file the divider so it slices through the exhaust gases nicely, and provides less of a flow restriction.

 

I have gone for an APW twin scroll manifold, Compressor Racing HX35 11CM 7 blade, Turbosmart ProGate 50mm, Siemens Deka 875cc injectors and an ECU Master black with my 1JZ VVTI. Hoping to make 500+.

Similar to you, I wanted the Holset for cheap reliability, it was £450 from Compressor Racing, I also previously had a HY35 on a 1JZ Non VVT, it was fantastic and came in really early.