01-27-2020, 10:20 AM | #1 |
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Official Turbo Upgrade comparison thread
Edit - just watch this. Seriously.
So it looks like a lot of people are getting fueling in place and probably ready to start seriously weighing turbo upgrades (I know I am). I think SC_B5X official HPFP options thread was really nice and organized and would be nice to do one like that for turbo options. This post is a work in progress, adding info as I receive it. Post your suggestions and info and I'll add it in. I'm using info I've pulled from websites and other threads here so if you disagree with any of the data points, shout it out and let's figure out what it should be. HYBRID OPTIONS
Other suggested turbo options? We can add the VTT GC+ later when we know more about it. Other suggested items to include for each option?
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01-27-2020, 10:33 AM | #3 |
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Also Doc Race
Recommendations: Group by options by hybrid vs true Big Turbo List recommended supporting mods If you list max HP potential, keep it at that. HP is heavily dependent on supporting mods so "expected" HP is an unknown variable. Link dynos as people post them in the future (Don't post screenshots, it'll take up too much space on the OP) I love how our development is ramping up lately |
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01-27-2020, 11:37 AM | #4 |
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Edited to include suggestions. I only see Stage 3 on Big Boost website, not sure if they offer any Stage 1 or 2 options.
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01-27-2020, 12:34 PM | #5 | |
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VTT GC and all of the pure options are hybrids that keep the factory exhaust housing. |
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01-27-2020, 12:48 PM | #6 |
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Thanks, adjusted.
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01-27-2020, 12:56 PM | #7 |
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Hell yeah, i'll give you updates on the Pure 800 as I go.
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01-27-2020, 02:32 PM | #9 |
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Does anyone specifically know the difference between the Pure Stage 2 and the 800? I thought the 800 was replacing the Stage 2. There is little information of a technical variety on their website. I was told that with Pure, the wheels were based on Mitsubishi designs, can anyone verify that? Forced Performance has had great results with Mitsubishi wheels.
Also, Pure requires a core where Vargas doesn’t. I get that Vargas has their own compressor housings, so in a drop in situation, a core isn’t necessary. I heard Pure machines the cores to accept their wheels. Where I’m curious is on the turbine side. If that’s true, it would be preferable to machining the wheel to fit the housing. With Pure, do you get new bearings and all? What I really want to know is if Pure does any significant machining to the OEM turbine housing on either the Stage 2 or the 800? Theoretically, it is possible that they could machine the turbine housing. Theoretically, enough machining could be done to change the turbine A/R. Changing the turbine A/R would be a material difference in flow. I think with the B58, improvements on the turbine side will make a bigger difference than the compressor side from what I have heard. A step better, for flow purposes, would be a Garrett G30 turbine or GTX 35 turbine, not that it has to be Garrett, but their sizes sort of are a standard. I would love to see a G30. The Vargas GC turbine sort of resembles a G30, but I’m skeptical that this is what it actually is. At best it’s a clipped G30 wheel, or a copy. I don’t know. That is what I would be interested in finding out. That’s back to my point about machining the turbine housing. If the Vargas GC reuses the OEM housing, the turbine A/R can’t be changed. At best you can have a better flowing wheel. If Pure is machining the turbine housing using the OEM casting to change the A/R that would probably be more significant. Depends on how much better that 9 blade turbine flows. That, I also don’t know. Maybe the Pure Stage 2 is better compared against the Vargas GC+. I just want to know what Pure is doing with their turbines. I’m used to endless turbo options with the Subaru EJ257 platform. These options are another thing entirely. Some EFR options are great but the 9176 is pretty huge. Looking back to just last August, it’s amazing how much progress has been made with DME and fueling. Turbos now make more sense as an upgrade. Hope to see more options coming. |
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01-27-2020, 02:39 PM | #10 |
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Thanks. Do you know if the Pure800 replaced the Stage 2 for B58? They don't show PS2 on their website any longer.
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01-27-2020, 02:40 PM | #11 | |
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01-27-2020, 02:46 PM | #12 |
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01-27-2020, 02:53 PM | #13 |
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I sent an email asking about whether it has replaced it and if so, what the differences are. When they respond I'll ask about the turbine housing.
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01-27-2020, 03:03 PM | #14 | |
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I think our electronic wastegate contraption really complicates replacement options. Being able to reuse that really saves some headaches, but limits our options. |
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01-27-2020, 03:04 PM | #15 |
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I'd also like to include some comments under each option about how the turbo affects daily driveability, for example due to spool times. I understand that bigger turbos have longer spool times and may need to build more boost to launch effectively. That's fine for track days and drag strips, but it seems like this could have a negative impact on in-town hijinks. If you daily the car and want to have fun from stoplights, I'd prefer to not have to do a full brake-stand launch just to embarrass the Mustang in the next lane.
Any suggestions on how to describe or organize this? I see Pure lists a "3200 RPM spool" for their Pure 800 but I don't know that this is available for the other turbos in the list.
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01-27-2020, 03:07 PM | #16 | |
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01-27-2020, 03:18 PM | #17 | |
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You can get used to it though. Guys were putting a GTX 35 on a 2.5 liter 8.2:1 compression 4 banger EJ257 and calling it streetable. It’s just a different animal. They have to be doing something significant to that housing. |
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01-27-2020, 04:17 PM | #19 | |
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Do you have 93 octane available in your area?
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01-27-2020, 04:22 PM | #20 | |
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Big torque spike around 3,200 RPM. Max torque looks to be around ~5,300 RPM. I shift very early in my 6MT, like 2 - 2.5k RPM most times (I sound like a douche revving it out to 3k to shift with my exhaust setup) and this would for sure be detrimental to my mostly urban driving. Also not a fan of the binary on/off that a lot of big turbos present. Rip motor mounts lol. |
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01-27-2020, 04:58 PM | #21 | |
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Still a long way to go before the torque curve looks like this: "Streetable" is a relative term. This is "Spool at 4,000 RPM" and it hit like a hammer. At times, annoying. |
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01-27-2020, 08:48 PM | #22 |
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You're not going to max out the stock HPFP on a Pure Stage 1 (or even the old stage 2) if you are just using straight pump fuel.
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