Recent content by ManuelB

Thanks for the feedback! Using JB4 PRO with the BT dongle installed at JB4?

Yeah! Even with just the Mach5 downpipe, the sound at full throttle is already amazing — aggressive and sharp! And the pops during gear shifts and deceleration are absolutely out of this world. I can only imagine how insane it would sound with an upgraded rear muffler too.. hehe :-D

That's great! 400 hp US version? At crank, right? Thank's for sharing! JB4 just arrived. Gonna mount it this week. Already installed the MACH5 GPF off, sports cat. It was a PITA to remove the original one..

LTFT at 34% ??? God... that's a lot! How much more boost is it making? I'm currently waiting for the JB4 to arrive so I can run some tests. In the meantime, I've been checking the wiring and I’m planning to tap into the CAN bus near the engine bay instead of running a cable all the way to the...

Thank you!! I believe you’ve already tested E30 on the Emira — mind sharing which JB4 map you used for it? Also curious to know: Any noticeable performance gains? Did you log fuel trims or AFRs? How’s the cold start and driveability? Would be great to know how the M139 reacts to E30 on the...

For anyone interested in official numbers, here are the dyno results published by Burger Motorsports for the JB4 on the Lotus Emira AMG i4 (M139): Dyno Results: Baseline (91 Octane): 387.5 hp / 311.5 lb-ft JB4 Map 1 (91 Octane, IAT Spoof): 422.9 hp / 354.9 lb-ft JB4 Map 2 (93 Octane): 439.2 hp...

Hi all, For those specifically interested in the JB4 for the AMG i4 (M139) engine, I’ve just created a dedicated thread so we can keep all the info, tips, results, and troubleshooting in one place: 👉 JB4 Thread for Lotus Emira AMG i4 (M139 Engine) – Tuning, Setup, Results & Support Let’s use...

Hi everyone, I noticed that most JB4 discussions here are mixed between the V6 and the AMG i4 engines, which can make it difficult to find specific info for each setup. To help keep things organized and easy to access, I’m starting this dedicated thread for everything related to the...

Went for a drive… ended up at the bar. Water bar. 😅

From what I know, the Emira i4 US and China versions do not have OPF/GPF, but they do have a typical catalytic converter and that’s actually one of the reasons they come with slightly more power compared to the EU versions. In Europe, they definitely have OPF/GPF — I’ve done some diagnostics on...

12 mm spacers all around from PCD.

Hey, I’ve got the I4 as well — mine’s at around 3,000 miles now. I’ve experienced that “jerky” launch thing maybe 2 or 3 times so far, always when starting from a stop in slow traffic. It does feel a bit like a weird delay or hesitation, and then suddenly it surges forward more than expected —...

Yes, exactly — same M139 engine as in the W177 A45 AMG. I actually watched a video on YouTube showing the engine number location on the W177, but it seems like it's not in the same place on the Emira. I’ve checked around the areas shown in the video, but no luck so far. If anyone has located it...