Read My Pull

Beta

Drop in an MHD or bootmod3 datalog. Get a plain-English read of the pull and a list of things to ask your tuner.

Your log
Tick the box above first. Then choose a file or drop it here.

The file is read in your browser and is not uploaded. The VIN line in MHD files is ignored.

No log handy?

The report below is running on a simulated pull, so you can see what a read looks like.

Where in the rev range

Nothing flagged means these checks found nothing to flag in this one pull. It is not a statement about the car. There is no green light on this page on purpose.

    Estimated wheel power

    Worked out from how fast the car gained speed in this pull. It is an estimate, not a dyno number.

    The estimate goes up with weight: a heavier car that pulled this hard needed more power to do it. Use the car's real weight.

    Other assumptions

    The pull in numbers, every 500 rpm

    Message for your tuner

    Facts from this report, ready to paste next to the log file.

    What this read cannot see

    • It reads one pull and only the channels in the file. A channel that was not logged was not checked.
    • Custom tunes can change what a logged channel means or how it is scaled. A number can be wrong for your car even when the file is read correctly.
    • It cannot see anything mechanical: leaks, plugs, oil, bearings, or how the car was driven before the log.
    • Fuel trims, VANOS, wastegate duty and oil and coolant temperatures are not checked yet.
    • The power figure assumes a flat road, no wind, one gear and no wheelspin, and it scales with the weight you enter. A dyno measures; this estimates.
    The rules of thumb behind each check

    These are common tuning-forum rules of thumb, not manufacturer limits. Your tuner may use different ones.