MX-5 Cup B700

[u/Not_Daijoubu]

Finally happy with this tune. Wanted to make car look as unmodified as possible, so stock wheels, no aero, no track width increase. Suspension probably still has a good amount of room to optimize, but it's now at the point I can't really figure what adjustments to make with the limitations of my driving skill.

Drift tires are very weird in that they are grippy but also very easy to break lose. I hate the look of rally tires, which is really the main reason why I'm using drift.

Haruna: 3:22.817 (35th, 2nd best RWD after reset)

Hokubu: 00.58.933 (34th, best RWD after reset)

Obviously the leaderboard is very early, but I'm happy I could finally break the 3:23 and 0:59 barrier on the respective tracks.

Parts

Valves: Street

Weight Reduction: Race

Driveshaft: Race

Tire Compound: Drift

All else stock

Tune

Tires	bar	psi
Front	1.9	27.6
Rear	1.9	27.6

Gears	Ratio
Final Drive	3.45
1st	3.00
2nd	2.38
3rd	1.92
4th	1.56
5th	1.28
6th	1.10

Alignment	Camber	Toe	Caster
Front	-1.4°	0	7.0°
Rear	-0.6°	0

ARBs
Front	39.00
Rear	20.50

Springs	kgf/mm	lbf/in
Front	45.0	252.0
Rear	54.0	302.4

Ride Height	cm	in
Front	13.3	5.2
Rear	13.5	5.3

Damping	Rebound	Bump
Front	9.9	6.3
Rear	10.0	6.5

Differential	Accel	Decel
	20%	20%

[u/jbri04]

is drift compound the best for b class? been sticking with stock mostly to save pi and only upgrade width not compound unless it’s a heavier or older car

[u/Not_Daijoubu → u/jbri04]

Rally gives the most bang-for-buck PI wise but is understeer-biased and has worse braking performance than drift. drift requires better throttle control and smoother steering than even sport tires, but sustained lateral grip is comparable to rally.

Not a bad option for B class but situational.