04-19-2021, 09:12 PM | #1 |
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BM3 Stage 2 w/ OEM Intercooler and Spark Plugs
Bootmod recommends upgrading the intercooler, and going 1 step colder on the spark plugs with stage 2. I know some adhere to this and some don't. Obviously, an aftermarket downpipe as well as the BM3 stage 2 license is required. Just wanted to get some feedback from users in both camps. I do worry about running high boost (17-20 psi) in the hot months to come. I'm in the southeast and it gets very hot and humid this time of year.
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04-19-2021, 09:59 PM | #2 |
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Suspension, then brakes, cooling, then power.
Always with the supporting mods. How I always look at things. If you plan to go Stage 2, I'd get the inter cooler. Will help you deal with heat soak issues and let you use that power on a longer duration. If you plan on just doing a pull every so often you can put it off but Id for the $, I'd get it. |
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04-20-2021, 07:57 AM | #3 | |
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04-20-2021, 11:15 AM | #4 |
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FWIW, I live in KC and plan on running the VRSF inter cooler with only a RaceChip box because every car I've had has heat soaked like a mf here even stock.
I'm kind of OCD though so just my 0.02.
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04-20-2021, 12:58 PM | #5 |
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Good looking out but how are you measuring the heat soak? Also, is your AFE intake an open or closed box design?
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04-20-2021, 02:20 PM | #6 | |
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AFE is closed box, pic for reference.
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05-12-2021, 02:29 PM | #8 |
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Did some logging today now that I'm stage 2 BM3 w/ catless dp. Still running OEM spark plugs and OEM FMIC. Boost peaked at 19psi, while normal operating IAT's was 76 def F w/ the peak at 100 def F. It wasn't a hot day though, low 60s while I was logging. She runs like a scalded cat and I'm loving the extra hp. Vibrant muffler will be installed on Tue. next week
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05-12-2021, 02:43 PM | #9 | ||
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05-12-2021, 06:37 PM | #10 | |
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05-12-2021, 06:55 PM | #11 | |||
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05-12-2021, 06:57 PM | #12 | |
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BM3 Stage 2 w/ OEM Intercooler and Spark Plugs
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2017 X5 XDrive35i X-Line | Sophisto Grey | MHD Full Flexfuel Tuned | Mosselman Turbo| Sutphin Tuning TCU | Nostrum Stage 2 HPFP | ER Charge Pipe | BimmerHausPerformance Intake and Inlet | ApexBuilt Catted DP | VRSF FMIC | Zeitronix Flexfuel Kit | KateCool Oil Cooler | Variant Wheels | Conti DWS06+ |
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05-12-2021, 07:22 PM | #13 | |
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lol, unlocked is pretty awesome. Having had the RC GTS black then recently moving to BM3, it's a game changer. Even stage 1 feels so much faster. |
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05-12-2021, 08:27 PM | #14 | ||
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05-13-2021, 11:58 AM | #15 | |
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No MPPK, moved from the RC to BM3 flash tune. I purchased the car w/ 50K miles already out of warranty. |
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05-13-2021, 12:17 PM | #16 | ||
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05-13-2021, 12:31 PM | #17 |
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Yeah he can't guarantee the no CEL. I just passed emissions a week before the dp was installed so I'm at least good for the next year.
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05-13-2021, 12:37 PM | #18 | |
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05-13-2021, 01:11 PM | #19 |
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05-15-2021, 08:28 PM | #20 |
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FYI, BM3 flash tune allows you to customize some features including "start up roar" which I'm loving. No matter how warm the car is it's a cold start every time. The standard BM3 stage 2 tune defaults to disable cold start since cats are deleted. I personally love the sound of cold start.
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05-19-2021, 06:21 AM | #21 |
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Reading more about 1 and 2 step colder plugs and it's really got me putting this at the top on my priority list. With a peak boost of 19 psi my injectors are obviously dumping a large amount of gas into the motor and I'd hate to get detonation. Also, BM3 stage 1 flash tune was so smooth which is designed for OEM plugs. When I went catless dp and flashed stage 2 it doesn't quite feel as smooth and I'm wondering not going 1 to 2 steps colder on the plugs could be the cause. Guess we'll see. I'll get this done soon.
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05-19-2021, 10:00 AM | #22 |
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I would def go one step colder. Are you feeling it misfire?
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