Article Index

The Driver

Mark RushbrookMark Rushbrook prepares and drives the black #21 ITA Saturn.  Born and raised in the Laurel Mountains of Pennsylvania, Mark learned to drive on country backroads full of twists, turns, and blind apexes.  Driving was never only a means of getting from point A to point B, but was instead a challenge of finding the best line in every corner.

After completing his Bachelor’s degree in Mechanical Engineering at Penn State, Mark moved to Michigan to earn his Master’s Degree in Mechanical Engineering and to start working full-time in the automotive industry.  Mark applies his 10+ years of chassis and vehicle dynamics experiences on the race track, as well as developing new products for SPS.

Shortly after arriving in Michigan, Mark was introduced to SCCA Solo II Autocross Racing.  He successfully campaigned his 1990 Pontiac Grand Am H.O. Quad 4 (on street tires!) and his 1995 Saturn SC2 for several years, including strong finishes at Nationals in 1995 and 1996.

Mark sideIn 1996, Mark moved from racing against the clock to wheel to wheel competition, running 100cc Controlled Enduro Karts on most of the Midwest road courses for three years.  With decade-old equipment, Mark not only honed his driving skills, but also his mechanical know-how as between session engine changes were all too common.  Mark was able to earn one victory and a handful of top 5’s to finish 4th in the 1998 Mid-States Championship.

After crewing for team scR since its humble beginnings, Mark campaigned the white #34 SSC car in SCCA regional competition in 1999.  In his first year of SCCA club racing competition, Mark won 10 out of 12 regional races.  In 2000, Mark took his 1995 SC2 off the street and converted it into the #21 ITA Saturn.  Most of the summer was spent building the car, but the #21 car finished an impressive 2nd place in its inaugural outing (just behind the #34 ITA Saturn).  The 2001 season had a few high points including a 3rd place finish at Mid-Ohio.  The team is looking forward to getting back on the track and running in the pack for 2002!

The Crew

crew chief Rob and Jean

The Car

1995 Saturn SC2

2212 lb. (without driver)

Steel space frame construction
Stock polymer body panels

scR-spec 8-point roll cage
Willans 6-point QR harness
NASCAR window netting
11 lb. SPA Halon fire system

Recaro fiberglass shell seat
All interior seating removed
All interior carpeting and trim panels removed
All sound deadening and insulation removed


VDO water temp, oil temp
VDO oil pressure, voltage

1900cc inline 4 cylinder
ITA prepared by Mark Womack
146 HP @ 6200 RPM
133 FT-LB @ 4700 RPM

SPS custom intake and air filter
Stock throttle body and intake manifold

AC Rapidfire spark plugs
Magnecor 8.5mm wires
side of car Exhaust
BSM 3" stainless steel, mandrel bent
scR-spec collector
Borla race muffler

Mobil-1 15W50 race oil
Red Line D4 ATF
Red Line power steering fluid

Stock 5-speed ratios and final drive
Quaife differential
Clutchmasters Stage 1 Performance Clutch

Enkei RP01 15x7
Rocketsport 68mm hardened wheel studs

Dry: Hoosier 225/45ZR15 DOT radials
Wet: Hoosier 205/50ZR15 DOT bias ply

Carrera custom coil-over housings
Koni 8611-1256 adjustable inserts
Hyperco 2.5" springs
Stock 28.6mm front sway bar
SPS 17.5 mm adj. rear sway bar
R3-spec spherical bearing strut mounts
SPS Adjustable Front Strut Tower Brace

SPS Magnum gold front linings
Stock NS187 rear linings
SPS rear disc brake conversion
SPS stainless steel brake hoses
AP600 brake fluid