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It's an aftermarket holset with an improved aero billet 63mm compressor (like an HTA wheel for a garrett) and a better flowing turbine wheel. It supposedly flows more than even a super HX40 (which has a 60mm compressor), I've heard 70+ lbs/min with spoolup like a stock HX35. Pretty pricey, but curious if anyone had played with one. A 70 lb/min turbo spooling up like an HX35 is pretty impressive, I think it'd be hard to beat for any 951 looking to make 450+ rwhp at reasonable boost levels. There are apparently some trucks nearing 700 rwhp with this turbo, so food for thought.
Looks interesting. A bit too much $$ for me, but if I were wanting to upgrade, it would one to look at. I didn't see a map or lb per minute quote. My hx40 pro wheel is rated at 72lbs per minute.
I'm wondering if this is an upgrade for the std hx 40. Iirc the center section is different on mine vs a reg 8 blade hx 40. It's been on there so long now, I can't remember.
Looks interesting. A bit too much $$ for me, but if I were wanting to upgrade, it would one to look at. I didn't see a map or lb per minute quote. My hx40 pro wheel is rated at 72lbs per minute.
I'm wondering if this is an upgrade for the std hx 40. Iirc the center section is different on mine vs a reg 8 blade hx 40. It's been on there so long now, I can't remember.
I agree a 1900 dollar turbo is too rich for my blood. The 70+ lbs is what I've read on diesel forums, and seems to be backed by some of the 650+ rwhp dyno charts I've seen. My interest in it vs a super 40 was not so much in peak flow, but rather the claims I've been reading of ridiculous fast spoolup.
On a somewhat unrelated note, Sid have you ever tried running a holset with a stock hotside? I have a 12cm and though I'm not worried about it being too big since its going on a 2.9 liter 16v, I am worried about it being physically too big to bolt up, which would suck since I already have a 3" DP with a holset flange. I'd really like to see what a super 35 will do with the smaller 12cm^2 hotside, I figure it can't be any worse spool-wise than running it with a smallish .48 T4 hotside, but I'm not sure it will physically clear...
I've never tried the Holset hotsides, bc they are so big. IMO it's much easier to mate a garret hotside. That also leaves a lot more options for future swaps. I know there are some aftermarket direct bolt on hotsides available. We are getting ready to use one on a syclone in a bit. I forget the name atm .
I've never tried the Holset hotsides, bc they are so big. IMO it's much easier to mate a garret hotside. That also leaves a lot more options for future swaps. I know there are some aftermarket direct bolt on hotsides available. We are getting ready to use one on a syclone in a bit. I forget the name atm .
Badass, I love syclones, they can be real nasty sleepers.
edit: Gotcha, yeah there are T3 bolt on hotsides, SS too but it doesnt say what A/R they are and IICR BEP used to offer them in both .55 and .70, obviously I'd like the bigger one.
So I found these really nice bolt on hotsides are still available new. They are stainless steel with a 3" Vband outlet and T3 inlet, .70 A/R. They make versions to fit both the HX40 and the HX35 turbine wheel. However, they are a lot bigger than I had anticipated, though still smaller than a holset hotside because there is no internal wastegate. On the issue of fitment, I received this response from an experienced DSM guy:
"If a 12cm2 T3 Holset housing hits the block, I don't think there's any way a BEP .70 T3 housing is fitting" and
"If the 12cm2 housing won't fit, neither will the .70 BEP housing. They're huge. You may be interested in the .55 T3 housing that Bullseye once offered- if you're lucky enough to find one. These haven't been in production since the 2006-2007 era."
Personally I think the BEP .70 housing will fit, its smaller where it counts in thickness, from the CHRA to the opposite side of the turbine housing, not including the Vband obviously. Also the lack of an internal wastegate really makes it a lot smaller than even the smallest holset housing, so I'm honestly not too sure what that guy was on about how if the holset didnt fit, the T3 wouldnt as well...They appear to not be anywhere near the same size. Sid, care to chime in? I'm sure your T4 must be larger than that SS hotside in basically every dimension?
Also, this will probably not be used under a stock intake, so I'll have plenty of vertical clearance with my short runners.
It looks like that would fit easily. The DSM guy is thinking about the largest part of the scroll since that's where it would hit on a 4g engine. Ours is rotated to the thinner area. That looks smaller than my t4.
That's what I wanted to hear! Thanks, I'm going to go ahead and order one, not cheap though (for a hotside) at ~400 bucks with a 3" vband DP flange and clamp, but worth it since nobody will machine a hotside for me. I'll post results once I get it bolted up.
It's pretty easy and straightforward to machine the garret parts to fit if you would rather go that route.
I would....gives me alot more options in the future and saves me $$. Thing is..I just sold a perfectly good .63 housing I had, I'd have to source another.. no big deal.
Second thing is, I'm familar with the ~2mm machining around the CHRA needed to get the holset to slide into the T-housing, but even if I found a stage 5 .63 housing, the HX35 turbine is still slightly larger than a T350 turbine, so it would still need to be machined internally, and I can't do that myself. Or am I wrong and it is something I can do? I'm picturing the hotside needing to be chucked onto a lathe and cut internally on the scroll, or is it more a dremel type deal? I have no machine tools at home beyond a dremel and an air die grinder. I just assumed it was a complicated thing since literally a dozen or so machine shops in the austin area flat out refused to do it for any amount of money, a few claimed they didnt have the proper tools.
Edit: there is one shop is waco that just does turbos (a 2.5 hour drive for me) that said they'd do it but they quoted me what I think is a ridiculous price of 280 bucks for 4 hours of machine time. Jeeze are they machining me a whole hotside from a block of billet? 4 hours???
I forgot you were using an hx 35 turbine wheel. I'd have to revisit the dimensions to say what I'd do. The p trim is almost a perfect fit for the hx 40 wheel.
It's mainly the exducer size you have to worry about. If it's close, you can use a 2" sanding roll to clearance the housing.
I forgot you were using an hx 35 turbine wheel. I'd have to revisit the dimensions to say what I'd do. The p trim is almost a perfect fit for the hx 40 wheel.
It's mainly the exducer size you have to worry about. If it's close, you can use a 2" sanding roll to clearance the housing.
I stand corrected, I had it backwards, turns out an HX35 turbine is actually slightly SMALLER than a t350.
Hx35 turbine has 58mm exducer, 70mm inducer and 11mm inducer tip height.
A t350 turbine has a 61.95mm exducer and 71.07mm inducer. Not sure on the tip height. but I did see 9.71mm listed one place, so it appears that actually an HX35 will indeed fit a stage 5 hotside with just simple machining on the CHRA. I never got to test this since the hotside I had on hand was for a T31 turbine and was way too small.
12-16-2014, 09:43 AM
Holset guys, check this out. Any experience with this turbo?
You could almost fit that holset next to it into the compressor inlet!