Originally Posted by
Granpa
Pit Shimizu make a 60D and a 55D tire. Tamiya alone makes at least 4 different spring sets for the Mini. What kind of track?????? Shocks were rebuilt, but what kind and how????? Also, this or a similar question has been answered many times in the last month.
I'm guessing PS 60D tires, Tamiya Mini springs, outdoor asphalt track. Also #456 and 454 PS tires with the insert that came with the tire. The only time I had a problem like yours with Pit Shimizu tires is when I got them mixed up and put the hards, #456, on the rear and the med, #454, on the fronts. Also the foam inserts that come with the tire are too soft. If you got the tires mixed up there is no way to distinguish which is which-----I know from embarrassing experience. Unless you can find a durometer.
You could run a set of PS #452 in the rear and use your present tires in front if you got them mixed up. I generally use the 452 in the rear unless temperatures are in the 100+ range. The 454 is usually too hard of a cpd for a rear tire.
Grip rolling is, contrary to popular belief, not fixed by going to a harder spring. Softer springing, especially in front, is more helpful.
Sorry, I should have been more specific
Running on a short, twisty high grip carpet track. TRF Dampers (#54000 I think), blue dot up front, yellow dot at rear. I basically stripped them down, made sure they were assembled correctly, then reassembled with fresh oil. Dragon 4000. I must not have used enough oil last time because they were rebounding a lot better after I did that.
Last night I swapped out the "rockcrawler" servo for a Savox SC-1252MG which made a huge difference. More responsive steering, no grip roll but understeering a lot more, and seemed to struggle with grip up front which seemed contradictory to me.
Anyway, long story short I never did find out why it would spin with the new tyres on the rear so kept racing with the old medium tyres on the rear.
Before the last race I noticed the fronts were heavily worn on the inside, so I used the mediums I couldn't use up back on the front. This made such a big difference that through a bit of good luck and sensible driving I managed to snag a win
I'll go back through this thread to try and sort out some of the issues I've been having. Seems to be a steep learning curve but I think I'm getting there race meet to race meet.