Stock springs = Junk.
I have been working on finding a setup that I like on this car and last night I tried a boat-load of big changes to narrow down what was working fo me. Last change I made was to switch to some Losi 22 springs that I had and the car dropped almost a half second on a 13.5-14 second track. Still need more but could run 14.1's consistently where I was struggling to get in the 14.5's. I feel like the springs were the problem the whole time and need more time to tune again with these springs.
I made a conversion chart between the Durango springs and the Losi ones. Maybe others will find it useful as well:
Losi Springs vs Durango Springs
- FRONTS
Losi Color/Weight = Durango Color/Weight
No Losi Equiv = Grey/32
No Losi Equiv = L. Green/41
Red/2.5 (44.6) = L. Blue/44
No Losi Equiv. = Black/47
Orange/2.9 (51.7) = L. Red/49
Silver/3.2 (57.1) = D. Green/58
Green/3.5 (62.5) = D. Blue/62
Blue/3.8 (67.8) = D. Red/66
Black/4.1 (73.2) = No Durango Equiv.
- REARS
Losi Color/Weight = Durango Color/Weight
Grey/1.6 (28.5) = Grey/28 OR L. Green/29
White/1.8 (32.1) = L. Blue/32
Yellow/2.0 (35.7) = L. Red/35
No Losi Equiv. = Black/38
Pink/2.3 (41) = D. Green/39
No Losi Equiv. = D. Blue/43
Red/2.6 (46.4) = D. Red/48
Orange/2.9 = No Durango Equiv.
Silver/3.4 = No Durango Equiv.
They aren't exact matches and a few too close to the next, but it gives you an idea.