SUPER 7 CLONE
Basic Specifications
Chassis & Body –
Tube frame with extensive rollcage superstructure.
Aluminum alloy skin and aluminum floor riveted to frame, unpainted.
Fibreglass nose and fenders, painted blue.
Suspension –
Front – Double A-arm with 195-lb rate coilover springs on Koni double adjustable shock absorbers with adjustable spring perches, Triumph GT6 spindles, Fiat rack & pinion steering.
Rear – Live axle with five-link location, 87-lb rate coilover springs on Koni single adjustable shock absorbers, ride height adjustable with spacers.
Brakes –
Front – Triumph GT6 discs and calipers.
Rear - Mazda RX-3 drums with parking brake mechanisms removed, RX-7 wheel cylinders, RX-3 brake shoes modified slightly to accommodate longer RX-7 wheel cylinders.
Hydraulics – Modified Porsche 944 stepped-bore (19mm/23mm) dual-circuit brake master cylinder, steel fixed lines, braided steel flex lines, residual pressure valve and adjustable proportioning valve in rear line. Clutch uses Mazda master and slave cylinders.
Drivetrain –
Engine – 1980 Mazda RX-7 12A rotary, street-ported, with Weber 45DCOE carburetor, twin MSD 6AL ignitions, custom header with in-line Supertrapp muffler, underdrive pulleys, light flywheel, puck-type clutch disc, alternator.
Transmission – Mazda RX-4 4-speed.
Rear Axle – Mazda RX-3 with RX-7 limited slip.
Cooling –
Double-pass radiator, oil cooler, electric fan.
Fuel System –
Fuel cell with check valve, Holley electric fuel pump, adjustable fuel pressure regulator, braided steel flex fuel line, fuel pressure gauge.
Lubricants –
Engine – Mobil 1 15W50 synthetic.
Transmission & Rear Axle – Redline 75W90 NS synthetic.
Wheels –
4 13x7 Panasport aluminum alloy with Hoosier 20.0x7.5-13 slicks; 4 13x10 Diamond Racing Wheel lightweight steel with Hoosier 20.0x9.0-13 slicks.
Cockpit –
Two Ultra-Shield aluminum racing seats with blue and gray covers, twin five-point harnesses with link and latch closures, Mountney 10-inch leather steering wheel with quick-release hub; AutoMeter instruments consisting of 10K tach and gauges for oil pressure, water temp, oil temp, and fuel pressure; warning lights for oil pressure and alternator; pushbutton starter and toggles for ignition, fuel pump and cooling fan; pull knob for choke; aluminum shifter knob and Simpson shift boot cover.
Electrical –
Battery in fully enclosed steel battery box at right rear of car, master cut-off switch with alternator protection.
Weight –
Approximately 1200 pounds with essentially 50/50 weight distribution.
Spares & Miscellaneous –
Open differential, Girling dual master cylinder, adjustable front and rear swaybars (not currently installed), wheels and tires (as described above), lug nuts, rear fenders (9” wide), rear springs (60-lb & 110-lb rates), touch-up paint, 2-cycle oil (for fuel premix); documentation including component manuals, wiring schematics, and receipts; and other small bits.
Applicability –
This car is visually a good representation of the Lotus Super 7 Series 3, but significant chassis and body differences render it unsuitable for anything other than competition use. It is well sorted and has been very reliable. It can be made legal for SCCA Time Trials events with very little effort. Nationally-licensed SCCA Scrutineer Richard Crowell has inspected the rollcage and found it to meet the requirements for Level 4 Time Trials competition. There is no tra