Tiger Posted October 7, 2006 Posted October 7, 2006 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
Tiger Posted October 9, 2006 Author Posted October 9, 2006 Pics of the car: http://www.usa7s.com/forum/uploads/20061009_174215_7cockpit.JPGhttp://www.usa7s.com/forum/uploads/20061009_174253_7engine0306.jpghttp://www.usa7s.com/forum/uploads/20061009_174339_7on61904.jpghttp://www.usa7s.com/forum/uploads/20061009_174418_7on72003.JPGhttp://www.usa7s.com/forum/uploads/20061009_174459_7on102404.JPG
locostv8 Posted October 10, 2006 Posted October 10, 2006 Very nice car. Where did you source the frount wings? Jim
Tiger Posted October 10, 2006 Author Posted October 10, 2006 Thank you. A young man started building the car, and I bought it from him unfinished. He already had all the fibreglass body parts, and I don't know his source. However, when it came time to acquire wider rear fenders for the wider rear wheels, I acquired them from: Curtis Unlimited 5990 Greenwood Heights Kneeland, CA 95549 Telephone 707-443-8523 (spoke with Faye) It's been a few years, so watch out for area code changes. They apparently make repro fibreglass parts for various Lotus cars.
scudracer Posted April 30, 2007 Posted April 30, 2007 I've seen this car somewhere. Mind if you mention the name of the builder? Thanks.
Tiger Posted May 1, 2007 Author Posted May 1, 2007 The chassis is one of three that were made from a jig in Carlisle, PA, before the builder sold his jig to Chris Custer, a Maryland Toyota dealer, and a partner, who modified the front suspension and sold the car under the name Rotus for a few years. (Purely by coincidence, I call my Seven "Rotus II" since my first formula car was a genuine Lotus 51A Formula Ford with a Mazda 13B rotary engine, that I also called Rotus.) The Maryland Rotus cars usually were not rotary powered. A young man living in Carlisle at the time stripped one of the original three chassis, added the rollcage, new aluminum and some new fibrelgass, and installed the rotary drivetrain. This was done in the late '90s. His intent was to run it in hillclimbs, but he ran out of money, lost interest, or both. I purchased the car, still incomplete, in '98 and spent a couple of years finishing it. It has been a fun car and quite reliable.
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