Fairly fresh blacktop asphalt. The setup is different because of the modifications i have made to the car, but it works DAMN well considering its age.
#1 piston, 45wt Losi oil, C- 2.4 XRay springs.
#1 piston, 40wt Losi oil, D- 22.5 XRay springs
4 Degrees of caster with the .010 of kickup per the modded suspension mounts.
I also swapped out the Losi steering knuckles for the Tc4 steering knuckles for two reasons.
1) To reduce front track
2) Ackerman (steering links are parallel to the steering rack at center)
The car is stable as a rock through chicanes. I can be very liberal with the throttle and put the car pretty much where i want it. But you can tell by my spring choice i am in search of more steering. The 2.4 springs rate is close to 16lbs, yet arent progressive and handle much better than the XRay yellows i had on there of lesser tension. Each trip to the track it gets better and better.
I have v2 of the rear tower almost complete. It will have holes for inner camber links to get rid of the 'wings'. I also have the plans done up for one piece vertical ballstud mounts (need material to complete). Both have the inner ballstud location moved inward .020. Rear body mounts are almost half an inch further out each and flipped to the same side as the shock to increase the feel/effect of the rear spoiler at speed.
I have to say, the spool was a real eye opener. The only spool negative is excessive brake will push you out of your line. I could no longer use my brake progressively into the corner or up to the apex. I had to brake coming in, and throttle through.
The car tracks very well, has plenty of rear traction (this car does NOT turn by overdriving into a corner and losing rear bite), and with the spool its very stable on power wherever you point it. It turned as well as a Photon i drove, but felt more direct and had more feedback.
So far the only drawback with LiPo and brushless tech is the shaft flexes A LOT at high rpm. It flexes so much it hits my antenna tube.
I have tried both a Tc4 shaft and Tc4 cups, and a trusty Niftech Titanium shaft i have compared to the stock carbon Tc3 shaft. All of them do it. I even took both sets of drive cups (Tc3/4) and turned them down on a lathe and reamed the centers to be sure there wasnt a balance issue with the cups. This is the only reason i am sticking with 17.5.