Originally Posted by
bds81175
Egads! Sugar and calcium?? And a 55° temp shift. You're right, that has to be one of the worst case scenarios. Luckily for us up here in Minnesota the track never thaws so there isn't much variation in surface temp (just kidding!) I guess I'm curious what you are currently doing and how you think it is falling short? I'm assuming at a bare minimum you are changing compound depending on track temp if not tread pattern, insert, sauce, etc. for every round.
Yes it was a tough day for sure... my pit area was swamped with tools and tires. lol Several weeks prior i was there before the calcium and sugar and was pretty damn close to hooked up till the sun dropped...
Originally Posted by
Dino_D
Outdoor sunny high of 90+
Normally outdoor with light fluff or dust on top.
First choice and probably the safest choice. Proline Holeshot M3 rear and X2 Scrubs up front would be my choice on a sunny day. Maybe X2 rears as well depending on grip.
If the track is rutted, then Blockades M3 in the rear. I normally don't run barcode type tires outdoors, its more of an on-off tire unless its sugared and very high grip.
Other alternatives would be JC 3Ds which is a combination of a barcode and mini pin in green or blues. This works well when the track is grooved up and will probably be more consistent than your regular barcodes especially when the track starts to dry. Its the in between tire of a barcode and holeshot. I hardly ever will use a full barcode type tire outdoors unless its sugared to hell and very grippy. Cause its either an on-off tire. It's different indoors.
You can also try AKA Impact Med or Softs depending on the temp. Impacts give you more rear grip than the holeshots, but I find the holeshots a bit more aggressive if you need battle it out. Impacts are too planted.
For night time. M4 or Supersoft. Holeshots M4 or impacts SS. If they water at night，then I would bring out the 3Ds in black or green.
My initial call was soft Impacts. I even tried varied pin lengths, and a set of near bald medium Impacts early on in the day treated with Paragon and heat that worked well in the groove but pushed badly (average 1 second slower per lap than TQ).
Later on as the track cooled, i went with soft Impacts as they added a little water and the groove started to deteriorate more than earlier, moisture retention was somewhat spotty (i felt an SS tire wouldnt give me the penetration i needed) and only washed (Dawn) and towel/heat gunned them dry.
From what i gather TQ was using JC's... but didnt get close enough to know if it was 3D's, or the compound. His car was definitely better than mine in the finals, as mine would easily slide out of the groove if i tried to make use of some corner speed, and pulling the front end up with a stab of the throttle wasnt an option. I ended up being a lap down by the end of the final.
I had minimal practice time and chased setup changes in the quals (i DID try different rear wings as average top speed there is slower than my home track, but had a new body i didnt run as i didnt want to compound the changes). The car was way off compared to the previous visit (took TQ and finished 2nd). I think the Impacts will work with chassis changes i noted for the next race there... but im sure there is something better as i dont run on sugar and calcium regularly.
From what im reading it looks like some 3D's are in my future. Maybe both green and black compound? I feel i really need to avoid the 'long' pin on the Holeshot... they can feel pretty edgy to me as well...