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YEAY ! SUPERRR! Btw ... just a quick comment re OBD->RPi : IFF you go BT, remember: standard BT (serial) stacks are not known for connection reliability and speed! ELM chips are not "fast" enough either ... if you want to close the loop reliably to your ECU data channels: stick to direct link...

oh ... and of course you need a T5 pitch pulley motor side as well! (Both pulleys and belts are not so easily available in T5!)

mine sits flush on the pulley! (I can tell with my fingers around! optically the bearing is in the way ... not going to pull that ;) )

The belt does not look like a T (T5) pitch belt! It has rounded teeth ... e.g . ... and probably not metric 5mm pitch but an imperial pitch!

Actually we always need to keep our vision sharp and be ready to re evaluate. On the other hand I know that Alex is a) not shallow in his conclusions (unlike me sometimes shooting from the hip) and b) has meanwhile burnt much more lesson cash than anyone of us. My personal take with the APDs...

ok ... I just multiplied 300A (the esc rating) with 50V(~12s lipo esc and motor rating) since it is sold as a combo as is from HW ... maybe I have used too much "over the thumb" estimates 😉

good point re tension required for rib belts and motor bearings!

as for the VESC: as long as the relively complicated (trigonometry! yeah I know you can work with approx tables and do int arithmetic vs float but still "expensive") FOC calculations are completely done in software and the VESC compute power is what it is right now (and us running 4 pole motors...

soooo ... the combo castle 2028 800KV sensored motor behind a HW max4HV esc as underdog solution vs LMT 30100 / MGM gorilla ESC as premium sledgehammer solution. It occurs to me that the 2028 is quite close to the HW 56113 800KV in dimensions (minus sensor). The HW 56113 is "rated" 8s max...

Not sure if you have seen those guys in the UK: https://www.ebay.com/itm/191502709715?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Ul8QMabhRKC&sssrc=2349624&ssuid=zEHjG31IQP6&var=490584523198&widget_ver=artemis&media=COPY I got from them my 260mm / 52 teeth belt ... but they have a vast...

I have not yet come to it, but I was thinking of tapping into the OBDII bus and digest process additionally RPM and MAP (or load if available). The response to TPS alone is flawed since on modern EFI systems with drive by wire TPS is an "outcome" of what the ECU(!, and they are different...

MSA ... AliExpress refunded me for my first order where the seller even generated fake tracking info! (visible by the "strange" and faulty english syntax in the status updates)

just after putting everything into the car? Are you in any way relying on/using chassis ground?

No worries, at least from my side ... internet hardened here 😝😝😝 I actually never feel offended or similar ... I know that we all come from different experiences and perceptions ... different histories. I have learnt a LOT here ... and at the same time sometimes my gutt feeling was telling me...

@WB projects ... just make sure the thrust effect is taken care of! (the impeller shoving air WILL put axial load on the shaft! And the impeller moving ever so slightly out will kiss the volute... again)

weellll ... I would worry about the lubing ... the bearing rating for those shaft rpms needed are all "wet"! (the SC crowd even introduces external oil coolers, especially for closed systems.) I know the RC crowd is whirring some 80k shaft rpms with tiny bearings for their extreme record...

... and then I tried to get smarter by...

are you referring to the flimsy trapezoidal 5mm pitch timing belt on the P2 whirring to turn that impeller close to 30k rpm? That one gets hot (and noisy!) due to mechanical friction of those teeth engaging... 6-10 rib accessory drive belts are being run all day long at crank speeds ... so e.g...

one more thing came to my mind: while it looks like custom motorshafts for BLDCs possibly are nothing special material and treatment wise ... didn't @AlexLTDLX face some challenges when he tried to machine the P2 charger impeller shaft? In other words: impeller shafts have special metal...

tuning is imparative! (otherwise you risk melting something due to lean at WOT!) in WOT your stock ECU will not be in closed loop (stoich AFR 14.7 or lambda 1, within limitations of the stock narrowband capabilities) but in open loop and based on Volumetric Efficiency model (if your ECU uses VE...