12-20-2018, 03:38 PM | #23 |
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What do you guys think about the VTT upgrade, they're going to be using a genuine Garrett gyx 3076r core + cast housings and a cast exhaust manifold. It looks pretty promising so far and is only $500 more than the ps2.
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12-20-2018, 04:41 PM | #24 | |
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They do say "Please be sure to specify year as there are some changes after 2013", which I believe may be referencing the wastegate change, so it's possible they have an EWG version, it's just not showing up on the site. The S1 version http://performance.vargasturbo.com/e...&product_id=41 does explicitly support EWG. |
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12-20-2018, 04:51 PM | #25 | |
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Ideally I would like to have a Borg Warner efr 7670 kit from speedtech, but that's alot of cash for ~470whp-500whp. Nearing the 500whp range a stage 2 hybrid turbo does get iats pretty high, low 400-450ish it's fine but I want a bit extra grunt, especially on pump gas. Plus these turbos should be alot more reliable for hard track use. |
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12-21-2018, 08:03 AM | #26 | |
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I communicated with Tony at VTT and he wouldn't give me a date for the EWG release only to say that the housings are being cast now. I can't figure out why he's casting a new housing anyways and not just using the Garrett complete housing instead of just the CHRA? I also have a concern with a couple of the threads on Facebook in the N55 groups saying VTT has quality control problems and some of their turbos are failing in the field. I also communicated with Jeff at Speedtech and learned the EFR kit required a bracket to move the water pump since the BW turbo is so large. I asked for pictures, but he didn't provide any. He did say he has a customer with an M2 who ordered the kit, but he hasn't received any feedback on any installation issues. I'll follow-up with both of them and see if I can get any new details.
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12-21-2018, 08:40 AM | #27 | |
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I'm a big fan of VTTO's idea back in 2015 when they release their Garrett CHRA turbo, but apparently, they failed. It doesn't spool faster than PS2 and doesn't make more power either. A successful turbo kit is a lot more than the concept, it's mostly in the execution.
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12-21-2018, 08:47 AM | #28 | |
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12-21-2018, 09:06 AM | #29 | ||
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Normally stage 3 turbo does not include manifold. The closest platform is A45 AMG which use the same BW turbo from factory but manifold and turbo isn't in one piece. Their stage 3 upgrade (top mount) do not need a new manifold.
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12-21-2018, 09:15 AM | #30 | |
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12-21-2018, 09:24 AM | #31 | ||
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I was explaining why VTTO has to cast their own everything instead of using Garrett off the shelf stuff. VTTO needs to use new casting to keep everything factory location, otherwise he has to custom make downpipe, which would be a stage 3 kit.
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12-21-2018, 10:31 AM | #32 | |
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Good read from a guy on another forum who has a 2012 N55 135i and went with the Speedtech EFR7670 and does a comparison to both PS2 and Big Boost:
https://www.n54tech.com/forums/showthread.php?t=50451 Quote:
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12-21-2018, 12:57 PM | #33 |
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Vtt has to cast their parts to make a new exhaust manifold to fit to the engine since the stock BMW one is a one piece design.
They needed to cast a new turbo housing like Sean said was to keep the stock downpipe fitting properly, and have the outlet of the turbo point forward instead of up like on regular gtx 3076r's, to make for better turbo to intercooler pipe fitment (probably stock will fit). In terms of reliability the 2015 models had issues from what I hear but since then they have perfected the GC 2.0 for the n54, in terms of spool it shouldn't make a difference because it will flow more than PS2 at all rpm ranges, and make more power at all rpms. Plus I heard all of their failures came from their custom chras leaking due to bad seals, wheels exploding etc. If they use oem Garrett parts there it shouldn't be an issue, the casted parts should be fine, plus they offer ceramic coating to deal with heat. Yup I saw that n54tech post, I frequent that sight alot. |
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01-02-2019, 04:04 PM | #35 | |
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There's not set amount of mileage when everything goes wrong etc, but expect with higher horsepower wear will increase, how much depends on your driving style and maintenance habits. |
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01-02-2019, 04:06 PM | #36 |
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You'll get more bottom end grunt, and mid range power but the upper end of the spectrum will fall off. Imo yes because you'll have a more efficient system dropping it's, and allowing more power on the same octane fuel. The issue is you won't be able to max it out or you may not be able to get much gains.
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01-02-2019, 09:19 PM | #37 | |||
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Much like F87source said, if you don't plan on upgrading the fuel system in any way, you really won't see much benefit out of an upgraded turbo. I'd venture to even say save your money if you don't plan on doing both the turbo and fuel system upgrade. I only disagree with one thing said above, what you'll end up actually doing is getting LESS bottom end power (not more), and more mid-range, with slightly more top-end. Ultimately, all you'll be doing is getting a much flatter torque curve with boost that comes on slightly later on in the RPM band. Obviously that answer isn't concrete because it all depends on which turbo you go with, but if you go with any of the popular choices, then yes, you will end up with LESS low end power because the turbo will take longer to spool / produce boost. Quote:
If anyone is seriously thinking of upgrading their turbo, I would highly recommend them read either my own build thread or SeanWRT's thread on his turbo upgrade. Both of those threads are written with in great detail, and more importantly they encompass two different approaches to unlocking more power from the N55 M2.
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01-02-2019, 09:45 PM | #38 |
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Is turbo swap still a viable option compared to the s55?
Currently in Aus used m2(non lci) can be picked up for 70-75k aud if I can get 450-500+ whp without mucking around too much I would probably give it a crack. What power are we seeing without fueling upgrades? Ie. 3-4k aud saving. Last edited by Fatkat; 01-05-2019 at 05:49 PM.. |
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01-17-2019, 11:20 PM | #39 | |
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01-21-2019, 08:25 PM | #40 |
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Hello everyone, I introduce myself, I'm Juan at BigBoost, LLC, hereinafter called "BigBoost Turbo" located in South Florida with over 28 years of experience in turbocharger engineering. We have supplied OEM industry since 2006 with over 20 thousand heavy duty diesel trucks turbo systems. Our quality has been proven and accepted by KIA, Hyundai and Mitsubishi for over 10 years now, so if you decide to go BigBoost you can be sure our quality meets OEM standards and even surpass them!
We have an specific M2 F87 turbo kit available, as most of you may know the subframe is completely different from a regular F2x or F3x. This kit will bolt-on directly to your F87 M2. We have now a Dual Ceramic Ball-Bearing option to fit these kits, for an extra charge of $350, however we are having a group buy for the ball bearing turbo kit which will go for a price of $2700 simple kit and $2900 Complete kit. We will also have a 600+ WHP build kit, which includes Stage 2 LPFP, Port Injection, BM3 custom tune, Spark Plugs and the turbo kit, going for $4100. What our kit includes: - Twin Scroll Manifold with 1.5" runners for all 6 cylinders - Dual Ceramic Ball Bearing Turbo Charger - 4-Ply Silicone Hoses - D0wnP1pe - V Band clamps - Coolant Aeroquip Hoses - Hard pipe for cooling system - Billet Aluminum Intercooler coupler - VTA DV System - Boost Pipe - 2 Piece 3" Turbocharger Inlet - Oil feed stainless steel braided AN lines - Stainless steel oil feed - Turbo oil drain coupler - Oil Drain Aeroquip Hose - All Stainless steel hose clamps ----------------- Why going Stage 3 with BigBoost? - We have done intense and harsh in-house testing, measuring individual cylinder EGTs, and back pressure. With our kit you will see 1.11-1.12:1 Back pressure ratios, these are safe and ideal levels of back pressure for the engine to operate smoothly and safely. - Fully custom turbocharger units designed to meet the flow capacity on the BMW N55 engine on the exhaust and intake side. We have tried well over 15 turbine and compressor wheel profiles and designs to determine which will provide the most efficient flow. Our IN-House Gas stand allows us to do so. - Race Cars running our turbo kit in 6-12 hours endurance racing with amazing results. - Best customer support in the industry, any time you can hit me up on text, FB, IG, WhatsApp, email, etc... whatever works best for you you'll see a less than 10 min response time from me or any person on the BigBoost Team. - We provide tuning advices and even do custom maps if required. - We DO NOT relocate the water pump, you keep it in the stock position, not even required to remove it to install the turbo kit. - We provide install guides with over 100 pictures of the installation of each and every component on the kit. - We DO NOT change the engine mount bracket!! You will keep your OEM RH engine mount bracket. - Boost Control managed with the stock EWG system - LAST but not Least, there's not a single Chinese part in our turbo system, it's all proudly made in the USA and other few parts like the turbo imported from South America. Turbo specs: Option 1 Compressor: - Inducer: 61mm - Exducer: 88 mm Turbine: - Inducer: 74.0 mm - Exducer: 64.5 mm Option 2: Compressor: - Inducer: 65.0 mm - Exducer: 94.0 mm Turbine: - Inducer: 74.0 mm - Exducer: 64.5 mm |
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01-21-2019, 08:50 PM | #41 |
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It's not bad at all! Very nice!
Just wish you guys had a larger selection of turbos like Borg Warner efrs, OE Garrett gtx. Otherwise pricing is great.
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01-22-2019, 07:47 PM | #42 |
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01-23-2019, 01:42 AM | #44 |
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