My curious attempt on speedboatrace 3DBenchy - 14 minutes 10 seconds - the white Benchy.

It is printed on my slightly modded Ender 3 pro but all the mods are basicaly not affecting the performace (except cooling which you could easily update too) so this should be obtainable on completely stock Ender 3 pro as well.

I am uploading my fastest profile as 3mf file with all the settings so you can test yourself but at first change to your printer (have a look at my accelerations) as I have KlackEnder with custom start gcode.

Also I give you a 3mf file for 22 minute Benchy with descent quality settings for fast printing that I came with after finding the fastest Benchy - there is ringing of course as I don't have input shaping but it is good for fast draft prints.

If you print your Benchy and see some issues unknown to you, you can upload a photo here in the prints and ask me - I will try to do my best to recognise the potential issue.

CONCLUSION

This is definitely not a speed record and the stock hotend was really having problems to keep up but I was curious what can be done with my setup and I was actually expecting much worse result - this was the minimum time I could get with the setup and Marlin - any more acceleration or speed was getting me shifted layers. It has greatly helped me to know the limits of the machine thanks to which I have made some better faster slicer profiles and helped me adress few issues on my printer.

PRINTER SETUP

• Stock stepper motors for X, Y and Z axis.
• Stock 8-bit board running Marlin 2.1.2 with linear advance.
• Stock hotend with stock heater cartridge, only changed to cheap bimetal heatbreak.
• Stock VREF settings.
• 0,4 mm standard brass nozzle.

• Custom printhead with direct drive and pancake stepper.
• Part cooling - stock 4010 blower fan supported with 4020 side blower.
• Linear slider for X axis.
• Linear slider for Y axis.
• Steel PEI bed.
• Dual Z.

PRINT SETUP

• 8000 mm/s2 acceleration on X axis (without direct drive you can go even higher)
• 3250 mm/s2 acceleration on Y axis (with lighter print surface can be higher)
• 2000 mm/s2 acceleration on Z axis
• 5000 mm/s2 acceleration on Extruder
•  
• 100 mm/s first layer speed
• 230 mm/s print speed overall
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• 0mm z-hop
• 0mm Retraction
• 230 °C white Aurapol PLA