HOW TO: Go Kart Tyre Pressures Explained - POWER REPUBLIC

In this week's video, we're explaining go kart tyre pressures.
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[@2mdallas]

Great vid and thanks for posting. I liked and subscribed.

[@pieboy666]

love the video mate keep it up!!

[@PowerRepublic]

Hey Aaron, thanks mate👍 any thing you would like us to make for you?

[@enlamiradelmundo79]

Thanks for the hard work and all the break downs.

[@PowerRepublic]

you are very welcome, thanks heaps for tuning in, and following along

[@Daniel-ip8dg]

Live your videos, you guys are great. Thanx for all the great info. We in the Midwest of America Road Race our Karts. Love my 90 mph Rotax!!

[@PowerRepublic]

Hey Dan, awesome, glad you like the vids.

[@BLITZKRIEG1]

thank you for that about the hopping. Always happens to me at last turn in Easter creek. Will definitely try increasing the psi.

[@PowerRepublic]

Good luck!

[@teter129]

I was hoping all day at the track today and I didn't realize why. Thank you for the education, I'm new to the sport, so you can write a book about all the stuff I don't know.

[@PowerRepublic]

awesome my friend, glad to help. feel free to search around our library, we have heaps of videos on how to Go Karting

[@pascalcardinale6001]

Awesome video !! I love my Prisma gauge with Infrared sensor and Stopwatch. It's the best . In my hand I have a tire gauge an Infrared Pyrometer and a Stopwatch. Top

[@PowerRepublic]

nice combo

[@christianbuczko1481]

Ive tried fitting a tyre pressure/temp sensor system to my kart. I also have a battery booster with compressor and guage built in to make pumping them up easy.

[@PowerRepublic]

yeah that helps heaps

[@dxknudsen]

so whats the tire temps should should see/ look to get for medium and hard tires? thanks for the info :)

[@PowerRepublic]

Optimum operating temperature range is generally 70 - 100 deg. C

[@SammyPProductions]

So on a nice 30 degree day at an ashfalt track what should I do 15psi or what should do. Racing a rotax max on a sprint track.

[@PowerRepublic]

use 3 pressures 13psi, 15psi and 17psi in 3 different sessions. then look at your mycrhon and try to work out when your best lap time was.

[@redhaze8080]

In a Rotax Evo max is brake and throttle at the same time a thing? If so when should i use this, what type of corner?

[@PowerRepublic]

yeah some guys do it, like in high speed fast 'kink' type corners. I normally choose \to lift off the accelerator over using the brake.

[@nilsonfilho5281]

sonho , quem sabe chego nessa qualidade

[@PowerRepublic]

always push forwards for the win !!

[@abuckshort]

At club level are you doing full pound changes, or going half or quarter (I got one of dem Longacre digital thingys)? Interestingly, I've been told not to stagger the pressures side to side which I never understood. I'll be doing that next time :)

[@PowerRepublic]

We use full pound for the newer guys. So they can feel some difference and teach them. The better the driver , the smaller the change. It is a little driver specific. But there is normally one tyre that does more work on a given direction or track layout. That when we will let out some more air in that specific tyre to avoid over heating.

[@gordonhirst3781]

what psi do I run my wet tires at 4s racer? love your videos full of helpful info.

[@PowerRepublic]

hey thanks for watching. start at 15psi for most conditions . 20-25psi if it is flogging down

[@grumpygramps1451]

@@PowerRepublic. Let me get this straight, when it’s raining and your chance of aquaplaning has significantly increased, you increase the tyre pressure which therefore decreases the tyres footprint on the tarmac which in turn decreases the tyres traction capabilities greater still?

[@godk3v]

Prisma is Good but i love my Alfano Tyrecontrol Air, its awesome!

[@PowerRepublic]

agreed, yeah they are awesome

[@human890209yang]

Do you measure the tire pressures when the driver sitting in the kart or lift the empty kart up?

[@douglasberg2881]

Doesent matter, you can try measure as the driver get out or in. Wont make a difference though.

[@thohou]

Very nice video! Really helpful. We have by chance just bought a prisma tyre pressure system last week. Do you know if there is an option to select two drivers on it? Me and my dad are driving togheter with 2 go-karts and would like to have both a different tyre pressure. Is there a way to select a second driver? Thanks a lot man, really helpful video's, keep up the good work! Greetings from the Netherlands

[@PowerRepublic]

you could always do same driver first so that you have odd and even numbers, but no I don't know how to add a second driver

[@thohou]

Thanks for your answer and help!

[@PowerRepublic]

@@thohou 👍

[@kidracermarianoaxel7104]

Hi what is the best cyl head temp range for minirok

[@PowerRepublic]

mostly they hit 180C but the colder the better for more power, ,if you could keep it at 160 it would be an advantage with all other parameters being equal

[@cachidril]

what is the range for temperature on a yellow compound?

[@ayrtontv6025]

I would also like to know this. I can't find an answer for this anywhere on the internet.

[@kurtbyrne5116]

What if I'm running kx80 eng in my kart on dirt track with atv tyres bro

[@PowerRepublic]

Hey Kurt, as a guess I would start low in the rear pressures maybe 8psi. then on the front I would use slightly higher maybe 12-14psi

[@nacoleon18]

Hello, so im running red MG tyres on a row shifter. I usually run these at 8psi and come out of the track with very hot tyres and around 13-14psi. First laps feel great but then I start to lose the rear during braking and corner exits. would you recommend to increase the pressure?

[@PowerRepublic]

Hey Pablo, not really for me. How wide are you in the back? if you are not at 1400mm maximum I would slip the rears out 5mm and check to see if this helps with the problem. let me know how it goes?

[@nacoleon18]

@@PowerRepublic hello. I am running the widest setting and was able to found a mild solution by adjusting front end and brake balance. However, according to MG tires website, these tires should be operating at around 16psi. My chasis is kosmic mercury R

[@dougdroen7519]

On a maxxis ht3 12×9.00_6 rear slick tire how much psi. It says 4.0 kilograms witch is 56 psi. But that seems a bit high. Mainly on gravel

[@thinukawijerathne]

It's the maximum pressure for the tire

[@jerryturner223]

Where can you buy that blue hone in the background.

[@PowerRepublic]

Hey Jerry, they are from Italy, check this out... effeciemme.com/racing/bench-honing-machines/

[@rhobconnick16]

Do rotation arrows really matter on slicks with no treds on the wheels?

[@PowerRepublic]

not really, and for some not at all. has to do with how they lay the rubber on the tyre I believe

[@scotthorwell]

Another great vid, what about tyre care / wrapping?

[@PowerRepublic]

Scotty, you should be wrapping

[@adrienjairo6750]

I guess Im asking the wrong place but does anybody know a trick to get back into an instagram account? I somehow lost the account password. I appreciate any tricks you can offer me

[@frederickjamal1808]

@Adrien Jairo Instablaster ;)

[@adrienjairo6750]

@Frederick Jamal thanks so much for your reply. I found the site on google and I'm trying it out now. Takes a while so I will get back to you later with my results.

[@adrienjairo6750]

@Frederick Jamal It did the trick and I actually got access to my account again. I am so happy:D Thanks so much, you really help me out !

[@karter111]

If your Rt side rear tire is showing hotter temps on the left side of the tire than the Rt. side lets say 20degrees how would you generate more heat in the Rt. side in order balance out the temps?

[@seohughes1908]

my guess would be weight distribution

[@PowerRepublic]

Hey Denny, great question. maybe you could increase the tyre pressure a 0.25-0.50 psi and maybe try one grade harder axel. let me know how that goes for you

[@kartbroertjes]

Would be nice to show the pressure in bar in a small window when you mention them.

[@PowerRepublic]

great idea, you mean in Bar and PSI

[@kartbroertjes]

@@PowerRepublic yes

[@lastchancecris]

I have some mojo tires on my kart and it says 4 bar or 58psi. Everything you talked about today in the video is a lot less than the psi stated on the tires. Should they not be filled to 4 bar or 58psi like indicated on the tires ? If your supposed to run them lower why would they indicate to fill them to those psi’s ?

[@andrewthomas3326]

That is Max pressure the tyre can take

[@PowerRepublic]

Hey C, yeah that is the inflation pressure when you are fitting the tyres. the running cold start pressures are closer to 12-14psi

[@haroonplays3389]

Hello how much will it be for the 401r chassis and a junior max engine together

[@PowerRepublic]

Depends on the options you would like to add or get it all shipped directly to you. Where do you live ?

[@haroonplays3389]

I mean without shipping because im looking at different teams in the uae and maybe in a few months i will buy a kart

[@haroonplays3389]

I used to drive for energy in the uae so i think they changed their name to xcel but idk im thinking about tony kart

[@SantiagoGonzalezOliveras]

I am running some evinco blue tires, I usually put them at 10 psi and they come back at like 13 but I only get a couple of laps before I start losing grip, should I increase my pressures?

[@hutking3508]

Increasing or decreasing pressure is really just an experiment, with lower pressures, if i for example start with 0,9 on my lecont tyres (JR 125 tonykart) i find that the slow corners give me low grip and slide, but fast corners are really good, and if i start with 0.8 i get additionally more grip every slow corner, but less grip in the fast ones. You shouldm experiment with tyre pressure on each compound, what i like to do is take a notebook with me, and write down each lap time, each pro and con on each pressure, and find out what im fastest with and whatnot. so just experiment with tyre pressure, no real answer for your question, hope this helps:)

[@Machobuck1317]

I'm new to karting n at the track ill be racing at runs hoosier r70b is there a good window to set those at?? Its hot out here rite now I'm in arizona it's 105 degrees

[@PowerRepublic]

Hey Ant, thanks for tuning in. gerneally for super hot conditions we use lower air pressures by 1-2psi start pressures. also too Magnesium wheels like the MXC helps in hot conditions. I'm not 100% on hoosier tyres as we haven't got those here in AUS. Do you know, are they a hard, medium or soft compound?

[@Machobuck1317]

@@PowerRepublic they are hard compound

[@PowerRepublic]

I would run probably 18-23 psi range for a hard tyre. in Arizona mostly like start high at 23 and work down at 2 psi increments until you find the sweet spot

[@r.david4398]

Very nice video! I have some questions. I'm from Romania and I would like to enter the world of racing because I love it, but I don't know very well details about karts, I would need some advice, what kind of kart to buy, I heard about Tony Kart being one of the better and I can start individually, in the sense that I buy a kart and I bought my wheels and a trailer and everything I need, I can go to register for the competition or I must find a club and I register with him and I assume that the sponsors will come when I start to compete, I need a little help from you to answer these questions if you can, because that is my passion and I would really like to enter in the world of racing. Thank you

[@PowerRepublic]

Hey mate, welcome. If you want to start racing, google search kart club closest to you. then visit the club and check out the guys there and what classes they are racing as you don't want to turn up with the wrong gear and have no one to race. Tony Kart are excellent and there should be a dealer close to you. Otherwise you might have to get another brand, but don't let that stop you starting. When new to racing, probably start with a second hand kart.

[@drigby18]

Go check out AMCkart near Bucharest

[@r.david4398]

@@PowerRepublic Thank you so much!!!

[@PowerRepublic]

@@r.david4398 👍

[@warriorwal]

@@PowerRepublic I don't mind this advice. the *only* kicker, is if you buy a brand new kart, if you somewhat have confidence in your ability, maybe you've driven before? you then get advice & a constant contact from the kart dealer, which is incredibly helpful in my experience.

[@inszow9569]

i need help with my kart im running komet tyres hard compound and when i ran 12 psi the tire was all rippled along the side and the kart skipped what pressure should i run for them tyres are komet K2H Hard also i struggled with grip on higher pressures

[@PowerRepublic]

I advent used those so I can't really say. where do you race?

[@roytje3935]

We used to run them with 14,5 psi hot, 1.00 to be exact so just run them and when you come in to the pits put them immediately on 14,5 when there still hot

[@shayanspeed8643]

hi.i can't understand something.in a high grip track,i may pump more pressure to decrease the grip and hoping in the kart.but with high pressure and high grip,tyres will generate a lot of heat and may overheat.so what should i do if i raised tyre pressure to decrease grip but tyres are generating too much heat??

[@krazed0451]

Run different tyres.

[@PowerRepublic]

you would use MXC wheels, or even the MXL (low volume) rims, then also too you might be able to optimise the rear axle to suit

[@natefranco8269]

Would you be able to make a video on running nitrogen in go kart tyres? Been trying to do research on that, can’t find much unfortunately

[@PowerRepublic]

Yeah we could, but I have never used it so I don't have any experience with it. here in Australia you can only use normal compressed air anyway. stick with that and you are good to go

[@natefranco8269]

@@PowerRepublic see that’s the problem😂 I race in the high humidity of Canada🇨🇦 tire temperature is a huge problem😂 compressed air becomes hard to regulate

[@stclairstclair]

Nate Franco, I asked "Racing Psychosis" about using Nitrogen and he said the benefit wasn't worth running it, They don't bother.

[@rodriguezfranco3839]

Air is 78% Nitrogen so no much diference , the thing is that nitrogen is more stable than oxigen I mean the volume changes less when the temperature increases

[@mendigodelike5098]

1 First Go kart race

[@PowerRepublic]

👍

[@mendigodelike5098]

god my lifein deuthland

[@PowerRepublic]

👍

[@haroonplays3389]

First

[@PowerRepublic]

👍

[@GertvandenBerg]

Metric would be useful...

[@PowerRepublic]

Hey Gert, we use 10-14psi for most slicks here in AUS (obviously there are exceptions) which is approx 0.75 - 1.00 Bar

[@GertvandenBerg]

@@PowerRepublic Thanks. I'm in South AFrica. It is interesting that PSI is used for it in Aus, which seems to be mostly metric. (Bar, which is somewhat metric (kPa is actually) is normally talked about) (Car pressures are mostly actually measured in kPa, but people talk in bar)

[@PowerRepublic]

@@GertvandenBerg yeah old habits die hard I guess. I have seen people use both here, I think its what I used to use with my dad when I was little and it has stuck. either is fine

[@guntergunter1488]

@@GertvandenBerg I mean it should not be a problem to look in google what 10 psi in kPa is. But it is funny to see that every country has a different unit for things like pressure. Here in Germany nobody uses kPa or psi everybody says bar.

[@GertvandenBerg]

@@guntergunter1488 This video just have a LOT of psi numbers to convert. (and unlike kPa bar, it is not just a decimal shift) In South Africa measuring is mostly done in kPA (occasionally in bar), but people mostly talk in bar. ("3 bar" is much more convenient than "300 kPa") (AFAIK, kW is not used for engine power in DE as well, which is a bit strange) (The only place I use horsepower is for the kart we have, where, for some reason, the max engine output is specified as 24HP, checked by dyno...) (Cars, etc is sold with power kW and torque in Nm)