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How it works

Drop in your logs. Read the debrief.

No account, no upload, nothing to install. Logwise runs in your browser and reads the logs your ECU already saves.

  1. Drop in your logs

    The .ld files M1 Tune saves when you download from the ECU, old ones too.

  2. Read the debrief

    Every run as a timing slip, wheelspin, shifts, and the engine's health.

  3. Get coached

    What to change at the track, sorted by who makes the change.

  4. Take the report to your tuner

    One printable page, with the chart that proves each item.

Step 1

Drop in your logs

Download from the ECU in M1 Tune as you always do. Drag the .ld files it saves onto Logwise, or pick them from a folder.

  • Level 2 logs hold about an hour at up to 200 Hz: best for runs, launches and shifts.
  • Level 1 logs hold long histories at about 10 Hz: best for health and history.
  • Logs saved within a few minutes of each other are read as one download, and each car is kept apart by its ECU serial number.

The first time, three questions: the drivetrain, the gearbox (suggested from the logs) and what you race. Fill in the car profile later for more specific advice: tyres and pressures, keypad buttons, your tuner's limits.

Nothing is uploaded. Even an hour of 200 Hz logs is read in seconds on a laptop.

Example data. Logwise on a phone: the Trackside screen with the last pass, 1/4 mile 7.481 s, and the earlier runs.
Logwise works on a phone too, at the track. Example data.

Step 2

Read the debrief

The answer comes first: one sentence for the car, the download and each run. Every number comes with what it should be.

  • Each full-throttle run as a timing slip: 60 ft, 330 ft, 1/8 and 1/4 mile, from GPS or ground speed with a 0.3 m rollout.
  • Wheelspin: when, on which axle and in which gear.
  • Each shift: rpm, drop, cut time, and whether the tyres held after it.
  • Boost against aim in every gear.
  • Health checks from every minute the engine ran, with a short history per download.
Example data. A run in detail: the timing slip, what happened (the front tyres spun in 2nd just after the 1-2 shift), the chart of front and rear wheel speeds, and tables of shifts and boost by gear.
Run 2 of the example GT-R, in detail. Example data.

Step 3

Get coached

Before it advises, Logwise asks about the car and the day: drivetrain, tyres and pressures, the surface, what changed. Then it sorts every suggestion by who makes the change.

You can change these Tyre pressures, launch rpm, boost by gear, keypad settings.

Inside your tuner's limits Checked against the rev limit and boost ceiling your tuner set.

Take these to your tuner Fuel, ignition and calibration: what was seen and where, never how to change it.

Launch and traction coaching only shows on a download you've marked as a Strip day. Why.

Example data. What to do on a strip day: change the front tyre pressure first, then less boost in 2nd on keypad button 2, one thing per pass; and the items for the tuner, from the dyno day findings to exhaust temperature spread and fuel pressure under boost.
What to do, for the example GT-R's race day. Example data.

Step 4

Take the report to your tuner

Everything for the tuner goes on one printable page: each item with the chart from the run that shows it, pressures and temperatures in both units.

There's a checklist of things to check before the next event too, and after a dyno day, a touch-up list. Print them, or save them as a PDF to send.

Example data. The one-page tuner report: cylinder 4 runs 64 °C (115 °F) hotter than the others at full throttle, and fuel pressure drops from 580 kPa over manifold to 464 kPa under boost, each with a chart of engine rpm and the evidence underneath.
The tuner report, A4 and light, for printing. Example data.

Then the next download

Note what you changed and how it felt. Next time, Logwise compares the runs before and after, and tells you whether it helped, made it worse, or isn't clear yet.

Open the appEvery feature
Example data. Before and after a front tyre pressure drop: 330 ft, weather-corrected ET and wheelspin helped; 60 ft not clear yet.
Did it help, after a front tyre pressure drop. Example data.