01-10-2021, 08:33 AM | #23 | ||
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01-10-2021, 09:04 AM | #24 | |
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Additionally, maxing out a turbo like that can't be good for longevity. Which is largely why I'm looking for something slightly bigger. |
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01-10-2021, 12:25 PM | #25 | |
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For sure though a bigger turbo like the pure800 would be happier and also have a high power potential. Hopefully they don’t price it too high, realistically the Vargas GC is direct competition to this turbo and it’s priced at $3000 I believe. |
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01-10-2021, 04:50 PM | #26 | |
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While my car spools faster and hits 500+ wft-lbs at 2500-rpm, the Dinan can't flow enough above 5600-rpm and power drops to just above Stg 2 E30 OTS b/n 6-7k: https://f87.bimmerpost.com/forums/sh....php?t=1774687 Everyone has different goals and we all have options now that didn't exist a few years ago (my Dinan turbo is a relic of my old Dinan Stage 4 setup), but here's how I see it: Stock turbo- Similar peak power as the Dinan on Stg 2+ OTS, but much harsher power drop off above 5.5k rpm Dinan turbo- See comments above. Considering the options today and my power curve, I probably wouldn't spend money to upgrade to this turbo unless I found a cheap used one available. TTE460- This is probably the turbo I'd go with if I was starting fresh. Stock like spool and can hold power better up top than the Dinan. I came from NA & supercharged cars, so even stock M2 turbo lag was very noticeable to me. Any additional lag from a larger turbo would be unacceptable for me. This one probably gets you ~460-470whp on a dynojet with the new Stg 2+ map and a flat power curve, but I don't know for sure. PS2/TTE550- If I wanted 500+ whp I'd probably get one of these. Likely the TTE550 b/c my impression is there's less lag b/c of the modified turbofold, and it's capable of a touch more power. Even larger- I won't pretend to know as much as you guys about these options, but for my M2 I would never go up this high b/c for someone that really pushes their car on track on hot summer days, I don't see anyway you can keep the car cool enough to be reliable with this much power. We don't have air to water intercooling and our cars are heavy--the trickle down effect of having to upgrade suspension, braking, cooling, etc, b/c of this much power would be enormous, and you'd end up just having to make a non-daily driving race car. For highway pulls, I'm sure it's a blast, tho! |
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01-11-2021, 01:08 AM | #27 | |
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I've been looking at upgrading my radiator and oil cooler because I'd like to eventually move up to a bigger turbo over stock, but afraid I'll run into cooling issues on track. Aiming for around 425-450 WHP on 91 with water/meth, which I think should be possible. |
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01-11-2021, 08:28 AM | #28 | |
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The great thing is ethanol will keep power levels up when IATs >100F, but my IATs were still hitting 150-160F in the summer with the Evo2 Comp. So, I changed to the Evo3 with the thought that lower IATs and lower air temps flowing across the radiator will keep the engine cooler: https://f87.bimmerpost.com/forums/sh....php?t=1727351 My IATs now max out at 25-28F above ambient when pushing the car extremely hard in the summer with numerous back to back 3-4-5 pulls on a Stg 2+ E30 beta map with hard braking events in between and the engine is staying cooler, whereas my Evo2 would hit 60F above ambient on the OTS Stg 2 E30 map and the engine would get hot while doing the same tests. Your plan for WMI will certainly help a ton while on track, I didn't go that route (yet) bc I didn't want to add another level of complexity while I was trying a larger FMIC and working on the Stg 2+ maps, and I'd have to carry in 10-gal of 50/50 for an open track day. And, you'll need a really good failsafe in place if you're going to use it for power on track and not just cooling. The sessions I'm describing when trying to keep the car cool are ambient >95F, open track, burning a full tank of gas (~45min), very sticky tires, AP Racing hard braking, and no cool down laps, so pretty extreme. Last edited by ZM2; 01-11-2021 at 05:44 PM.. |
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01-11-2021, 06:50 PM | #29 | |
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True about the failsafe - although I figured the WMI controller already had some soft of "hard" failsafe (basically limp mode) built in? I pretty much track the same way, although my skill level is way below yours, so my requirements aren't as extreme Would you happen to know how large of a meth tank would I need to run to complete a 20 min session? I assume that 10 gal number was to last a whole day? I figure lugging in 10 gals of mix is still way cheaper than a tank of race gas! |
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01-11-2021, 07:23 PM | #30 | |
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If it were me, I would probably save the map that uses WMI for power & cooling for the street, and use WMI purely for cooling on track (and not tune for it). Using limp mode as a failsafe can be a bad idea on track b/c a sudden drop in speed with someone behind you could end up being a bad day for someone very quickly. At least when IATs and the engine get warm on track, timing & power is pulled gradually so that it's easier to pick up on and manage without surprising anyone/yourself with a sudden mechanical issue. As for how much, when I did my math I estimated 1-gal of 50/50 every 30-min for my type of running, so that's how I get 10-gal for an open track day. If you're doing a typical HPDE with 20min sessions and 3-3.5-hr of running a day, you can probably get by with 5-gal. So, if you're keeping some mix in the paddock, you don't need very large of tank--even the windshield wiper reservoir is large enough for a couple sessions. Last edited by ZM2; 01-11-2021 at 07:31 PM.. |
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01-12-2021, 11:05 PM | #31 | |
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And thanks for the math! |
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01-15-2021, 10:08 AM | #32 |
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Check some of the recent Stg 2+ E30 posts in the F30 N55 forum. There’s a guy running 91 & WMI on the Stg 2+ map with some decent success.
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01-21-2021, 12:39 AM | #33 | |
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I spoke with Pure on the phone, and they let me know the Pure800 offering for the n55 will spool even later than the PS2 though. So if a quick spool is your goal, then the PS2 may be the better option. If your goal is High HP, then the new Pure800 should be considered. My goal right now is quick spool, be able to support the maximum HP to where I don't have to build the engine, work on e30/or other similar gas with just a HPFP stg2 upgrade, and need no more than 21-22psi of boost. I'm assuming 21-22psi won't be running the turbo at its maximum. I have heard the limit is roughly 550whp for the n55 in my 640i before needing to replace rods, pistons, etc. So a PS2, or similar turbo maybe with a larger manifold will be the route I will eventually take to achieve the most power under the curve. |
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01-21-2021, 01:41 PM | #34 |
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Here's another cast manifold option thats going to be released soon from Ross sport in the UK. I can post more details when they become available....I have a feeling we will see a few cast manifold stage 3 turbos on the market soon.
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01-21-2021, 02:52 PM | #35 |
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Wow nice
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01-24-2021, 09:25 PM | #36 | |
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01-24-2021, 09:45 PM | #37 | |
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But, if someone can pull it off, would love to see it! |
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01-24-2021, 10:33 PM | #38 |
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Well tyspeeds 505whp car had no issues, but by that point it's not a street car anymore. So just like you said, by the time you can cool 500whp it's not really dailyable anymore.
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01-27-2021, 09:57 AM | #39 |
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The turbo in the picture is mine and will be fitted and mapped soon
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01-27-2021, 10:25 AM | #40 |
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01-27-2021, 11:57 AM | #41 | |
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Crank hub fix Mpe exhaust Wagner dp Wagner evo 3 intercooler Pipercross v1 intake Pure inlet Csf radiator, oil/dct cooler Turbosmart diverter valve Aem meth kit Xdi35 Tte550 3.5 bar tmap Uprated plugs Custom ecutek mapping with connect Looking for 600hp with out to much bother Parts I have avaliable if needs Stage 2 lpfp Dodson clutch pack. If the xdi35 needs upgrading I will probably go with nostrum. Which I have been looking at with Ross sport since last summer. |
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01-27-2021, 12:25 PM | #42 | |
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Did you get any numbers on the tte550? |
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01-27-2021, 12:55 PM | #43 | |
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01-27-2021, 02:28 PM | #44 | |
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Keep us updated on your results with the new turbo 👍🏼 |
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