Friday, August 19, 2011

Shifter Kart versus A-Stock Corvette Comparo

My normal ride is a 2010 Spirit SP32 Stock Moto Shifter kart that I run on sprint kart tracks, but for the 2011 SCCA Solo Nationals I will be driving my friend's 2004 C5 Corvette in A-stock class. These are obviously very different vehicles so here is a look at the differences between these two types of racecars by the numbers:

2004 Chevrolet Corvette

(photo credit: Vu Banh)

Class: SCCA Solo A-Stock
Engine: 5.7L V8
Drivetrain: Front-engine, RWD. 6-speed H-pattern transmission to a rear differential
Suspension: Double control arm w/ ride-height adjustable leaf spring and w/Anti-roll bars
Steering: Hydraulic rack and pinion
Brakes: Front and Rear vented disc brakes (all four corners)
Wheels: 17x8.5 (front), 18x9.5 (rear)
Tires: 275/40ZR17 (front), 295/30ZR18 (rear)
Modifications from stock: Adjustable front ARB, Adjustable dampers, R-compound tires, 6-point harness, titanium cat-back exhaust
HP: 350 hp @ 5600 rpm
Torque: 375 ft-lbs. @ 4000 rpm
Fuel: Premium Pump Gas
Weight (w/ 200 lb driver): 3375lbs
0-60 MPH (est.): 5.0s
Top Speed: 175MPH
Max. Lateral G's: 1.4 g's

2010 Spirit SP32 / Honda CR125 Shifter Kart

Class: SKUSA S2 Senior Stock Moto
Engine: 125cc Honda CR125 (2-stroke)
Drivetrain: Mid-engine, RWD. 6-speed sequential transmission chain-drive to a solid rear axle
Suspension: None
Steering: Pitman arm with adjustable Ackermann setting
Brakes: 2 front disc brakes, 1 rear disc brake
Wheels: 5in x 132mm (front), 5in x 212mm (rear)
Tires: 10x4.6-5 (front), 11x7.1-5 (rear)
Modifications from stock: Porch extension kit to move pedals farther from seat
HP: 40 @ 12,500 RPM
Torque: 25 @ 10,200 RPM
Fuel: VP MS98
Weight (w/ 200 lb driver): 405 lbs
0-60 MPH (est.): 3.5s
Top Speed: 125 MPH
Max. Lateral G's: 3.5 g's

Video Comparison:

Corvette AutoX video from last years solo nationals (random video I found on YT):

Shifter kart (video from my last race):

Clearly from the numbers, photos, and videos, it is clear that these vehicle are the opposite of similar. However, both vehicles are fun in their own way and will both put a smile on your face....unless you are driving the Corvette and get smoked by a 400lb "toy."

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