Skip to content

Reviews

What customers report.

Written by BMW owners who ran the remote process end to end. Reviews are published after they are checked.

4.9

Average of 12 published reviews

“Was running a generic Stage 2 OTS map that pulled negative timing on cylinder 4 during back-to-back third gear pulls once the weather warmed up. Sent my first round of CSV logs to Synergy and had a revised map back the next day. He showed me where the load targets were spiking on the canned file and reworked the boost vectoring to clean up the torque curve. Three revisions in, the mid-range is smoother and timing holds across all six cylinders to redline. Rolling onto the throttle on corner exit doesn't feel twitchy the way it did before. The custom file was a real improvement over the off-the-shelf flash.”
Mike S. (@G20_B58_Mike)B58 G20 M340iCustom ECU calibration (from OTS)
“single turbo e92 runs great now. four revisions to finish and boost sits right at 22psi, no oscillation, no throttle closure. appreciate it man”
brandon_e92N54 E92 335iCustom ECU calibration — N54 single turbo
“Came off an off-the-shelf E30 map that felt aggressive and hard to predict on track. The old setup had throttle response like an on/off switch, so modulating partial throttle on the way out of an apex was a pain. Synergy reworked the pedal mapping and got the ethanol scaling right so the fuel trims stayed even under load. The log review was the useful part. We ran four revisions checking that HPFP pressure stayed stable up top and that boost held without throttle closures. Corner exit is more predictable now and oil temps sit lower through a 20 minute session.”
Chris T.S55 F80 M3 CSCustom ECU calibration + flex fuel
“Took 5 revisions, mostly because my car had a boost leak at the charge pipe coupler that I didn't know about. Justin caught the slow boost build in the datalogs and stopped before raising WGDC or load targets, told me to check my physical connections first. I fixed the clamp, sent a new log, and the next revision landed. Boost hits target right away now with no oscillation. Knocking a star off only because my own hardware problem stretched it out a few days. The tuning and the willingness to flag a mechanical issue before pushing were both what I wanted.”
Dave MillerN55 E82 135iCustom ECU calibration + data log review
“Not many people will take the time to do a real custom calibration on the N55 E70 instead of loading a generic OTS file. Boost delivery is smooth now, mid-range torque on 93 octane is well up over stock, and it's more responsive around town when I'm merging.”
Greg K. (@E70_Greg)N55 E70 X5 xDrive35iCustom ECU calibration — 93 octane
“Did a custom E50 blend file for my G80. Logs were clean by the second revision, and we did a third pass just to tidy up the top end near redline. It pulls hard all the way through without dropping fuel pressure on the HPFP.”
Alex R. (@M3_Comp_NY)S58 G80 M3 CompetitionCustom E50 flex calibration
“running 19T twins on e50. last tuner couldnt keep wgdc in check and kept overboosting on spool. sent logs over here and got a revision back the same night that sorted the overshoot. big difference on spool now”
Jason_N54N54 335xi (2007)Custom ECU calibration — upgraded twins, E50
“I don't track it, I just wanted a solid daily that still has something when I get into it. Cold start idle was rough with my catless downpipe and that got sorted on the first revision. Emails came back fast and the logging instructions were clear.”
Dan KowalskiB58 F36 440i Gran CoupeCustom ECU calibration — daily
“The datalog analysis is the part that's better than automated or one-size tuning. I sent a couple of third gear pulls from 2500 to 6800 RPM on the base map. They spotted a small timing drop on cylinder 2 that would have been easy to miss and told me to change that spark plug before we went any further on power. New plugs went in, I re-logged the next day, and timing hit targets on every cylinder. Once the baseline was clean we brought up the top-end boost while keeping the turbos inside their efficiency range. Careful with the motor, which is what I was hoping for.”
Tyler B.S55 F82 M4Data log review + custom calibration
“quick turnaround on every revision, usually a few hours. mid range torque on e30 is a big step up from what i was running before”
sammy_m2S55 F87 M2 CompetitionCustom ECU calibration — E30
“It's a heavy SUV so my main worry was getting the torque curve right without loading up the drivetrain more than it needs. The custom map holds boost more smoothly through the range than the off-the-shelf flash I was on before.”
Rich HendersonS63 E70 X5 MCustom ECU calibration — S63
“Custom calibration for my Pure Stage 2 turbo setup. Boost holds 21psi reliably with no throttle closure. Answers to my technical questions came back direct, no runaround. Worth it if you want a map built around your exact hardware.”
Kevin P. (@F30_Kev)N55 F30 335iCustom ECU calibration — Pure Stage 2

Want the same for your car?

Send the chassis, hardware and fuel you run, and we will confirm the calibration path.