08-17-2014, 05:50 PM | #1 |
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JB4 + EWG Harness
Is anyone out there running the JB4 stage II with the EWG Harness Adapter? wondering if i should buy this swell when i order a tune
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08-19-2014, 02:37 PM | #3 |
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Drives: 2019 G30 M550i
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2019 G30 M550i
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08-19-2014, 05:12 PM | #4 |
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The EWG harness is still in early BETA. Without it you'll be limited to around 4-5psi over stock. Better than a Stage1 but not up to the full JB4 mapping which depending on your fuel could run as much as 10psi over stock. No doubt there is plenty of work to go on the EWG mapping as BMS is the only tuner I've seen who even offers EWG tuning control.
Other tunes like Manhart do not alter the cam timing. It's impossible to do with just one wire on one vanos sensor. Instead they use that connection to read RPM. The JB4 on the other hand reads RPM via the CANbus. Without electronic wastegate control the Manhart would be similarly limited to 4-5psi over stock. A lot of the EU tuners like to ramp up the partial boost throttle mapping which makes it feel boost happy in the midrange. BMS has a setting to do that also if you'd like in the JB4. They just don't advertise it as they prefer the linear throttle input where you only get full boost at 100% throttle. Contact them for mapping details if you want to try it out. Mike |
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08-19-2014, 05:24 PM | #5 | |
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08-19-2014, 06:16 PM | #8 |
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No idea why your car didn't run right at partial throttle, but I have the JB4 with EWG/FF wires, intake and downpipe. So far I've only tried maps 1 and 2, but driveability is no different than stock, just significantly faster.
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08-19-2014, 06:50 PM | #9 |
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08-19-2014, 07:13 PM | #10 | |
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I see you have a Stage1 turbo? That requires special EWG tuning to work right. BMS recently added one to their 435i EWG. On the $70k Crazy on the car price. I hope they pay you guys enough to make up for it over there. On the Manhart piggyback it's not something I'm overly familiar with. Throw up the logs I'm curious how they compare AFR wise to stock and the JB4. I have a feeling it will be identical but logs normally don't lie. Mike |
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08-19-2014, 09:04 PM | #11 | |
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On Map 7/100 octane on the JB4 my best trap has been 110 mph. Runs 12.7 ET consistently at 109.5 with 1.95-2.0 60 ft. Foot braking. Got lucky once with lauch control when tired hooked,cut a 1.89 60 ft and ran PB of 12.45 ET.Launch control now just spins tires so get best times foot braking and easing into throttle . |
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08-19-2014, 09:10 PM | #12 | |
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At what rwhp? What mods? On Map 7/100 octane( dynoed at 370 rwhp) with the JB4 my best trap has been 110 mph. Runs 12.7 ET consistently at 109.5 with 1.95-2.0 60 ft. Foot braking. Got lucky once with lauch control when tires hooked,cut a 1.89 60 ft and ran PB of 12.45 ET.Launch control now just spins tires so get best times foot braking and easing into throttle .DA is about 2000ft . Only mods are JB4 and MPPE.Thinking about down pipes. Last edited by olaosunt; 08-19-2014 at 09:13 PM.. Reason: Spelling |
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