Gene Felber Archive: RX-7 Modifications and Specifications
Engine
A-SPEC /Garrett GT35R turbo, .70/1.06 AR on the compressor/exhaust. TiAl 46mm WG and TiAl 50mm BOV.
M2 air box with carbon fiber cover and sides modified to work with the single turbo
ASP/M2 medium intercooler and Greddy elbow
Innovate! LM-1 wide band air/fuel ratio meter with Bosch LSU sensor and heatsink
J&S knock sensor w/dual display
M2 lightweight battery conversion/relocation (to passenger bin area) w/marine battery box
NGK plug wires
NGK BUR9EQP plugs, leading; NGK R6725-105 (10.5) race plugs, trailing
A'PEXi Power FC ECU with Commander
Datalogit for Power FC
Racing Beat 3" dual outlet exhaust with muffled SS center section
Blitz Dual Solenoid Spec-R electronic boost controller
Bosch Motorsports high flow fuel pump (054 254 044), direct wired with Bosch 30 Amp relay
Greddy WP and Alternator pulleys
SS block-off plates for DT and ACV, EGR, rear turbo oil drain and secondary air
Jaz mini breather catch can for oil overflow and eliminated oil fill PCV valve
Aeroquip StartLite kevlar fuel lines, -8 and -6 with AN hardware
Bosch 1600cc secondary injectors
K2RD secondary fuel rail
SX fuel pressure regulator
SX inline fuel filter
Suspension
GAB Super R 8-way Adjustable shocks
M2 threaded coilover conversion kit
Eibach 2.5" track springs 550x6" (F) 450x7"(R) -old config
Eibach 2.5" track springs 650x6" (F) 550x6"(R)- experimental config
Eibach 2.5" track springs 650x6" (F) 450x7"(R) - current setup for track/autocross
Unobtainium Motorsports Nylatron differential bushings
Unobtainium Motorsports Nylatron rear suspension bushings for upper A-arm shock mounts
MazdaSpeed front and rear upper A-arm bushings
Unobtainium Motorsports Nylatron front lower suspension bushings
M2 HD sway bar mounts
M2 trailing arms
M2 toe links
GAB strut tower brace
race alignments
Cooling
M2 expansion tank bypass kit and high pressure radiator cap
M2 50% larger core radiator
Redline water wetter
enlarged radiator inlet
carbon fiber radiator/intake ducts
CWR dual Mocal oil cooler kit and -10 AN hardware/lines
Drivetrain
RPS heavy duty pressure plate and 6 puck sprung center hub clutch
RP 8.5lb aluminum flywheel
Neo 75-90HD synthetic transmission fluid
Redline 75W-90 differential fluid
reduced ratio 5th gear (main shaft and countershaft) from MPV/929. Changes stock from .719 to .827
Wheels/Tires
Street
Kinesis K58: 18x10 +48 mm offset (F), 18x11 48mm offset (R), black powdercoated/textured centers
Pirelli P-Zero Assymetrico tires 285-30-18 (F), 295-30-18 (R)
Track
CCW 3-piece wheels w titanium fasteners (new lightweight design) 18x10 (F&R)
Hoosier R3S03 Slicks, 285-30-18 (F&R)
Brakes
Hawk HP PLUS pads (autocross & street)
Performance Friction 01 (F) & N-Tech comp (R)- SOLO I (Hawk blues front for other track events)
Motul 600 brake fluid for track from Widefoot Racing
M2/AP Racing big brake package with 13" slotted rotors
custom aluminum brake ducts and high temp 3" hose
stainless steel caliper pistons for AP brakes $$$ from Essex Parts Services
high temp dust seals for AP calipers from Essex Parts Services
Thermax caliper temp strips from Essex Parts Services
N-Tech front brake backing plates/ducts
Mazda 2002 RZ (larger) rear rotors (Mazda Competition Parts)
Mazda 2002 RZ rear calipers (Mazda Competition Parts)
Interior/Safety
Willans 3" 6-point safety harnesses (from Bethania Garage)
SPA boost/water temp gauge A-pillar
PFS boost gauge with Pettit column mount)
Mazda Miata OEM leather/AL 5-speed shift knob
Mazda AL door sill plates
CWC Widefoot pedal adapter
lightweight interior felt replacing much plastic - aft of seats, trunk area and tranny tunnel
removal of foot well padding/sound insulation/tar
custom window switches for CF door panels
M2 roll bar - street/track configuration with harness bar, rear diagonal and main hoop diagonal
Kirkey aluminum road race seat
MOMO 350mm Motecarlo steering wheel (from LTB Motorsports)
custom carbon fiber cruise control mount to the Momo wheel
Mazdaspeed steering wheel adapter (Corksport)
Amperex 10 B:C fire extinguisher with custom aluminum mount
Exterior & Miscellaneous
1999+ Mazda OEM front spoiler (Mazda Competition Parts)
4'x 4' utility trailer with custom tire rack, trailer hitch
To be installed:
Nothing at the moment
Upcoming:
Mazda 929 master cylinder
Specifications
Length |
169 in. |
4293 mm |
Width |
69.3 in. |
1760 mm |
Height |
46.5 in. |
1181 mm |
Weight |
2615 (w/o driver), 2835 (w/driver & racing equip.) |
1188 kg, 1288 kg |
wheelbase |
95.5 in |
2425 mm |
track (stock/race) |
57.7 (F & R) in |
1466 mm |
Corner Weights (older weights with driver & 1/2 tank fuel) | |
LF: 777 lbs. |
RF: 677 lbs. |
LR: 748 lbs. |
RR: 688 lbs. |
Power |
362 RWHP @ 12 PSI (est.) ~ 409 flywheel HP |
415 PS |
Weight/HP (w/o driver) |
6.4 lbs./HP |
2.9 Kg/PS |
Goal: 2,500 lbs; 450 HP
Remark: A 1993 base model RX-7 weighs 2840 with 255 HP = 11.13 lb/HP
Updated 10/02/2005