Rev-Matching in a Racecar - Caterham Supersport Heel & Toe

I took the opportunity during a race to talk a bit about shifting technique. Remember to smash that subscribe button!
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The purpose of heel & toe when downshifting is to match the revs of the engine and drivetrain to the speed of the driven wheels. Without proper heel & toe footwork you rely on the synchromesh to do the work for you - something it simply can't do proficiently at the speed that we require it to in racing.
Being proficient at rev-matching is super important to being able to drive on the very limit. Without matching the revs on down-shifts the driven wheels (in this case the rear wheels) are liable to momentarily lock-up as the powertrain catches up with the speed of the wheels. That momentary lockup in a rear-wheel drive usually results in oversteer. If you're rev-match properly you can enter corners at the very limit. If you don't, you're forced to drive slightly below the limit to allow for less than ideal shifting technique.
This is most noticeable in corners where you need to downshift while already turning. It is however still important to get done nicely even when braking in a completely straight line, because downshifts without proper rev-matching still affect load transfer and also limit how far rearward you can run the brake bias.
Up-shifts are a lot more straight-forward. Clutch pedal in as you lift off the throttle, change gears, and clutch pedal back up and back on the throttle.

[@AmirFaridGani]

nicely done..thanks for the video. very good information

[@MikkoNassi]

Thank you Amir! I'm fairly happy with being able to cover the major points considering this was unscripted and during a race. :D

[@kartoffelpommes3138]

Sweet technique! But is it a SV or S3? The pedalbox seems to be really wide. Or do you just have small feet? Greetings 😉

[@MikkoNassi]

Thanks Kartoffel! I believe it's the slightly roomier SV 👍🏻 The pedalcam is probably quite misleading. There isn't much room in there and my shoe (eur size 45) sometimes clips a bar at the top of the pedal box. 😅 You have/had a Caterham? Which model?

[@kartoffelpommes3138]

@@MikkoNassi Roomier SV, just what i thought 😂 I bought my first Caterham last month, waiting for spring. I got an eur 44 so it will be pretty snug in my S3 😅. By the way: LHD with the 1.8 VVC K series and Jenvey ITBs. Cannot wait to finally drive it! It is awesome that you show your skills and also the mistakes! I found nobody showing this as professional as you. Cheers✌

[@MikkoNassi]

@@kartoffelpommes3138 thanks it means a lot Kartoffel 🙂. Enjoy the car! 1.8 sounds perfect 👌🏼

[@krimznheidiz]

U in malaysia now?

[@MikkoNassi]

Not right now. I'll be there for a day this Wed though. Sepang again :D

[@MikkoNassi]

Thanks for subscribing :D

[@woozhi9218]

First glance knew it was my country

[@MikkoNassi]

Haha yeah easy track to recognize. Awesome track. Thanks for watching!

[@woozhi9218]

@@MikkoNassi yeah the bleacher stands out from most race track wait it should be all race track are different and unique this is a much fairer or proper way to say