Sure is.
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Hope I haven’t dragged this too off topic about my driving and setup. So to get back on topic, any thoughts on tire pressure for the left front to bring the wear back in line? Or is it driving technique causing the high wear on the inside?
I struggle constantly getting tyres to work during practice sessions. Race weekends is ok there’s plenty of rubber on track to help them along but practice sessions are soooooo dusty my tyres always seem polished smooth.
What’s best in dusty conditions? Go high or go low? How high (or low)? We typically run at 1 bar which seems on the high side already?
Komet K1H
Inner edge will always wear more due to the kart’s geometry. The slight feathering is the bigger concern. If you settle down the braking a little bit and maybe try some of the chassis adjustments I noted, that should clean up.
@Richard_Jacques Dust is going to be hard to combat. I’m not super familiar with the tire, but as a hard compound, it’s probably comparable to an MG Red. If that’s the case, it’s not a lot of tire for the engine, so it can be hard to put power down on that. 14 psi isn’t that high for a harder tire like that. On particularly dusty/fresh pavement tracks we will run double that to get the tire to bite. Might be worth trying 20-25 psi (1.3-1.7 bar) just for a hoot and see what it does.
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Anyone else running Hoosiers (r60 B) and having issues with them coming apart in weird ways?
Each tire seems to do it a little differently and oddly enough it’s always fronts not rears. My brother had one blister all the way around with only 9-10 heat cycles on it. I’ve had a couple that have started to just oddly chunk down to the cords when there was otherwise good amounts of tread left.
This was last weekend, it’s got basically the same corded area 2 places on the tire 180 degrees from each other. Started to undeteer pretty bad. In all fairness this one was at least used up from a depth perspective but it had been both rotated on the kart and flipped on the wheel trying to get max life out of it. This was my practice set not race set so I knew they were on the end of life but still weird patterns on these.
When our track used LeConts they would do the same thing at the end of their useful life, where the cords would show at an angle. My guess is it has something to do with how the tire carcass is constructed. The dimple is only a reference.
@tjkoyen just finished 5 practice sessions, 10-12 laps each. 42 deg C / 67% humidity.
Ran initially at 1.3, great off the bat but overheated after 3-4 laps. Dropped to 1.2, much better though a bit lively still through the fast right handers. Pressures end of that session 1.35ish but rear left 1.5. Dropped that one to 1.1 cold, kept others at 1.2 - drove very well, far less tail happy, lapping only 1.6 slower than my 12kg lighter team mate in a shifter. Happy enough with that.
And my tyres actually looked a bit scrubbed, rather than polished 
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Nice! Sounds like that helped a bit then.
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Hmm, very consistent 
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what did you film that on? was it one of those pinhole cameras?
CamBox Meca helmet cam. Pretty neat little piece, wish I had the HD ones now. But ideal for driving reviews. Not necessarily legal to run during race day at some series now though.
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Any thoughts on these is appreciated.
Dunlop SL1, 23psi, 8hrs (540laps) in Twin Honda Enduro at ~420lbs
540 laps. Wow! What’s normal for these tires?
Fronts got a good workout during the runs. How was it for pace?
You could probably have the rears work a little harder… But then again, SL1 is a very durable tire.
We are about 1s of the pace of the front runners - it’s maybe 50/50 kart/driver deficit.
It seemed ok in high-speed corners with little lost to others but needed to be overly patient in applying throttle from slow corners to avoid oversteer.
Rear width was 1350, and front 118 from top of kingpin to inside of rim.
Ride height mid in the front and high in the rear.
Wish I still had my Prokart notes ha. I wonder if the oversteer is from the front tires just being overworked. I’m almost inclined to say move the seat back a little.
(For people outside UK and Ireland, a Prokart is a dual engined Honda four stroke, somewhat like a twin 206. Very popular in the 90’s)
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where do you buy that from online?
Do you have pictures of it? Seems to be interesting vehicle. What was the horse power of it?
What do you mean with 23psi and 420lbs?
Tyre pressure and total set (vehicle+driver) weight?
Isn´t it 23psi too high?