Do Flat Tyres Make Your Car FASTER? | For Science
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Published 2021-11-12
Thanks to Santa Pod for supplying the footage for this video - bit.ly/3v1dNdN
So we tried everything from 70 PSI, all the way down to almost nothing, to see how it changed the cars grip, launch and ultimately, eighth-mile time.
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All Comments (21)
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Those flat tyres were sketchy!! What would you like us to test next?? Don't forget to subscribe!
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Use a car with power where the tires matter more, and launch control to eliminate the driver variable
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Would love to see how those tire pressures handle a corner close up and braking/lap time.
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I should have known Brit's measure heat in relation to tea.
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The ideal pressure depends on the size of the tire (and of course on the car it is fitted to and especially its weight). It doesn't really make sense to compare tirepressures between tires of different sizes or between different cars.
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Hamilton is typing...
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Experiment would have been better with a vehicle that actually had enough horsepower to spin the tires.
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@6:40 not sure the gains are even real. you had to try twice. i think rolling resistance is just as important for such a low power car when doing this, and high pressure has the advantage there, even with only the rear tires being pumped. pump all four tires to 50 psi and you'd have your best time, specially in 1/4 mile or longer runs.
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Would be super interesting to see how these pressures would affect a laptime or cornering ability
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I had a MR2 with ultra low profiles and got a flat rear tire, the sidewall was so stiff that I couldn't even feel the flat below 30mph! Drove all the way to the local asda and shredded the sidewall! 🤣🤣
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I hope you let the tyres cool down in between. Temps of the tyers also has an effect.
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the driver is also a key factor here.....you have different reaction times and also sometimes you wheelspin more.....you need to repeat this test with an automatic car so all settings are default in each run
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I loved seeing the tire wrinkle at 5 PSI! That was awesome!
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one aspect you might have missed about Drag tires, and Big drag tires at that is that they act as a clutch and take the initial shock of the driveline locking up and slowly transfer it to the ground to avoid spinning.
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You'd need to do that with a car which can spin the tires up to 3rd gear. Otherwise, you're within the margin of error, because 2 seconds into the run, you can't spin the tires anymore.
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Loving the series idea. I wonder what a 2nd run at 30 would have given since that time ended up being a noticeable outlier. Is there something you can do (in a hatch/estate) with ballast to see how moving the weight distribution around affects the car? Maybe 100kg (water tank?) in the passenger seat, boot and somehow strapped out the front like an Audi engine! ☺
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After their 15psi, you can see the wheel hub spinning before the rubber does which means the rubber is slipping.
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You should have kept the tyre pressure in the front constant. Lower pressure in the front will just increase drag. The lower pressure might actually have been better if it was just the rear wheels.
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MASSIVE thumbs up for this youtuber that goes straight into action within 30s of video instead of warbling aroung
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instead of acceleration you could test tyre pressure vs cornering speed or lateral 💫G-force
