04-02-2018, 02:49 AM | #23 | |
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I think on stock turbo and good gas you can make a good top end that's worth revving up to, though peak still would lie in 5-6k if you max out there. The way AA tune make peak at above 6k is they don't push hard at 5k~6k. This is good and bad. Good is power consistency and bad is less power at a critical rpm range. BTW, by fueling, it's the high pressure fuel pump I meant, one of the known weak point of N55 that seems to be exaggerated by everyone these days. No, I have no intention to do injection kit at any time. 7s I will achieve with some other platform.
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04-04-2018, 10:42 PM | #25 |
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Really? I feel my M2 is really slow. I haven't done actually tests yet, but it feels like my 2007 Saab 93 Aero Stage 0 is much faster. Maybe the power hits more at once in my Saab and the M2 is more linear, I dunno. But my M2 certainly doesn't feel like the rowdy beast I want at stock.
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04-11-2018, 10:37 AM | #26 |
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SeanWRT you didn't do a stock map with bolt-ons dyno run?
Is your 340/375 run Fully Stock as you mentioned or it had the Dinan Turbo with Bolt-ons?
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04-11-2018, 07:17 PM | #27 |
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It was another M2 bone stock dynoed on the same day.
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04-12-2018, 11:55 AM | #28 |
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You needed to do a stock map of your car
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05-23-2018, 10:33 PM | #29 |
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I have mechanic do the install for me, so upgrading to STG1 turbo is just 1k+ USD to me, costing about the same as a HJS core downpipe. Worth it.
I know in the US and Europe, labor is expensive. I would suggest you go directly to Stage Two turbo.
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05-24-2018, 02:08 AM | #30 | |
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In my experience [JB4'd M135i EWG ran for 4 years on TM99 or SVP], this reaps good gains across the board ie more "area-under-the-curve" and allows more pull for longer in the upper rpm range. This is also proven in the dyno pots I've sent you of my car + the ones shared by BishUK recently....My 2cents worth. BP
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05-24-2018, 02:31 AM | #31 | |
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& should you decide need more, whilst Sean's advice below is solid.......
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I looked into this a fair bit with my M135i [to make the jump from low to high 400's bhp reliably] and not worth it IMHO. BP
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05-24-2018, 03:02 AM | #32 |
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Guys,
At this point, I'm upgrading to something else. My goal is to have M2 N55 truly match a pump gas tuned S55, meaning put down anywhere from 450-480whp Dynojet number as I like. I thought M2 power is perfect as my car is now, and I hate it having 450+whp with F8X RWD flatform. But blame BMW for this - not doing what I am doing, I would be walked away with no respect by M2 competition with a flash needing nothing else, which I'm not comfortable with. As always, no meth, no PI. Drive and maintain 100% like stock. I will share more down the road as I progress.
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05-24-2018, 05:34 AM | #33 |
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Sean,
what is the current spec of your M2 in terms of your upgrades etc ? What grade fuel do you run it on in China to get the results posted above ? BP
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05-24-2018, 09:14 AM | #34 | |
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I guess 450-480whp on pump gas will be the new perfect at the time of having S55 M2 with us. Heck, even new G20 M340 will have 380hp. I bet it will put down 370whp because it has 48V system carrying all the burden which is 20-30whp worth. Upper the game M2 Originals please.
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05-24-2018, 10:12 AM | #36 | |
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Wagner Evo2 Comp Intercooler ER Charge Pipe HJS 300 cell Downpipe & MPE catback Dinan Turbo GFB DV+ Custom Tuned by Halim on RON98. No. But it could be realized if PURE use a Garratt DBB CHRA and Titanium Turbine. Cost is going to be 6~7K + core deposit. I would do it should it happen.
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05-24-2018, 10:47 AM | #37 |
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Nice spec - was custom tune via BM3 or Halim@HCP directly ?
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12-10-2018, 06:53 PM | #39 |
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Hey SeanWRT I’m thinking about grabbing the Akropovic 300 cell DP to go with my Dinan Turbo & IC.
Do you see any issues with simply loading and running your BM3 map on track if I have easy access to 93 (and 100) octane here in the US? Thanks. |
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12-10-2018, 06:58 PM | #40 | |
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BM3 OTS STG2 93OCT is a good map for track if you use Dinan turbo. I logged it in May with high ambient temp and knew that.
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12-10-2018, 07:02 PM | #41 | |
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12-10-2018, 07:06 PM | #42 | ||
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If your oil temp is good, only thing holding you back power wise is IAT. More Octane means greater capability of handling high IAT.
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12-10-2018, 07:20 PM | #43 | |
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I was reading over the the BM3 STG2 93OCT thread that you don’t even think I would need the DP for this scenario. Do you think the DP would either provide more power or reliability with these maps and 93-100 octane? Thanks. |
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12-10-2018, 07:27 PM | #44 |
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I have not seen a proper comparison with and without DP. But DP will reduce EGT in any case, and thus decrease in cylinder temp, which is critical over repeated pulls. Also stock cat will die quickly with heavy track use.
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