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  • Affordable, sleek and light as a feather. It bursts onto the scene just as the world

  • was recovering from the gas crisis. Almost forty years later you can still find it tearing

  • up tracks and endurance races around the world. For many cars you can describe the engine's

  • sound with a word like. Hum. Purr. Roar. They were here to spend time with an iconic car

  • whose engine noise could be described as a barrel of angry bees!

  • Not the bees!

  • This is everything you need to know to get up to speed on the Mazda RX-7.

  • It would be impossible to discuss the RX-7 without talking about its engine. A Wankel

  • rotary engine. What is a Wankel rotary engine Pumphrey? The rotary engine works of the geometric

  • principle of inscribed triangles inside of an ... f*** f*** dude. The rotary engine works

  • of the geometric principle of inscribed triangles inside of an epitrichoid figure. Enormous

  • words to describe the slightly mesmerizing movement of a triangle trapped in a pinched oval.

  • As the triangle-piston rotates it creates three areas inside of the compartment. The

  • faces of combustion occur around the outside of the triangle as it spins. The rotary engine

  • was invented by German engineer Felix Wankel when he was a f*** teenager. Didn't get around

  • to actually marketing the engine until after World War II while he was working for a motorcycle

  • company named N.S.U. Nebraska State University holler! In 1959 N.S.U. invited a group of

  • engineers and leaders of the automotive industry from around the world to see Wankel's rotary

  • engine. One of the men was Matsuda, head of what was then called Toyo Kogyo and they had

  • made their money creating auto-rickshaws and later trucks under the name Mazda-Go. Matsuda

  • loved the Wankel. He immediately licensed it from N.S.U and brought the prototype

  • to Japan. He essentially bet the farm on the engine. And in 1961 told his chief engineer

  • that it needed to be reliable and production ready as soon as possible. Within the first

  • hour of running the prototype the motor ceased. Within a few days it had blown itself up.

  • Yamamoto's job was gonna be a lot harder than he thought. The main problem was the tips

  • of the triangular-piston. As it spun around it left chattering wear marks on the inside

  • of the chamber. The team called them devil's nail marks. It was only after Yamamoto had

  • a eureka moment while writing that they solved the problem. Using graphite from the pencil

  • leads the created apex-seals. RX-7 guys you know that word. And they gave the rotor smooth

  • movement around the chamber without chattering. When all was said and done after eighty prototype

  • cars Mazda released the Cosmo Sport 1 10 in 1967. Their very first rotary-sports car.

  • The Cosmo and the rest of Mazda's rotary fleet sold really well until the gas crisis hit.

  • Now these are the gas prices last year, these are the gas prices this year.

  • In 1978

  • the markets had recovered enough for them to debut their new rotary sports car. The Mazda RX-7.

  • The RX-7 known as the Savanna in Japan was meant as a direct replacement for the RX-3

  • series. The RX-7 ended up indirectly replacing all of the other rotary cars except the Cosmo.

  • Mazda retired everything else in 1977. It was inspired by the Lotus Elan and the first

  • series referred to as the SA because of the beginning of the VIN series. It was a light,

  • two-seat-coupe. Mazda called it front mid-shift-rear-drive

  • since the Wankel 12A engine was sitting slightly

  • behind the front axle. This gave the car a low center of gravity and good weight distribution.

  • She's a good-looking girl, she got good weight distribution.

  • While the engine was definitely

  • light and it packed quite a punch.

  • Falcon punch!

  • The RX-7 could go from 0 to 60 in 9.2 seconds

  • and ran at 100mph at six thousand rpm. Unlike a normal reciprocating engine,

  • the rotary needed to be driven to red-line on a fairly regular basis. Mazda actually

  • recommends running it to red-line in order to both clear out the carbon deposits and to

  • keep the oil at the right temperature and viscosity.

  • Now that's what I am talking about.

  • And what kid form the 70's and 80's couldn't get behind a car with pop-up f*** headlights.

  • Come to think of it I am still behind anything with pop-up headlights. All three series of

  • RX-7's were released in the U.S. with the FB name attached to the series 2 and 3. Series

  • 3 saw the introduction of the 1.3L 13b engine. The RX-7 was already becoming a darling of

  • the club racing level. It was fast and very light. And it handled beautifully. As long

  • as you had fuel in the tank because if you had an empty tank it would spin.

  • In 1985 the year I was born Mazda redesigned the RX-7 for my birthday and the second generation

  • was born. This time they took inspiration from the Porsche 944 and the FC RX-7'S were

  • closer to a touring car with sport's car highlights than the first gen pure sports car. The series

  • 4 produced from 1986 to '88 came standard with the 13b DEI engine. With a turbo version

  • available with 189 horsepower. Mazda also finally got around to upgrading to rack and

  • pinion steering. Which greatly improved what could politely be called its tendency to over-steer.

  • It also traded out the clunky drum brakes for discs and the series 5 inched up the horsepower

  • to 160. And finally to 200 with the introduction of the turbo II. The coolest car in Initial D.

  • The FC was Motor Trend's import car of the year in 1986 and the Turbo II earned its second placement

  • in Car and Driver's ten best list as well.

  • But even after adding a convertible top the best RX-7 was yet to come.

  • In 1992 Mazda released the futuristic looking third

  • gen series 6 RX-7. Finally embracing its sports car identity it came standard with a 13B-REW

  • sequential twin-turbo engine. The twin-turbos had been designed in part by Hitachi and worked

  • together to give smooth acceleration. The first turbo supplied extra torque at low rpm's

  • which had always been an issue for the rotary engine. And operated between eighteen-hundred

  • and four thousand rpm. The second set on standby until it reached four thousand. With the actual

  • seamless change-over occurring at forty-five hundred.

  • Enough, you want my head to explode?!

  • The international community however was going to have to satisfied with this last imported

  • version. Due in part to Japanese financial crisis in the 90's. Ford took over as a controlling

  • interest in Mazda in 1996. The series 7 RX-7 released soon after was only available in

  • Japan and Australia. It's final iteration the series 8 was released in Japan only with

  • a myriad of upgrades. More efficient turbo chargers, better intercooling and radiators,

  • new lighting design, more comfortable seats, 17-in wheels. And more power.

  • Power, power.

  • But alas they were not for us. Mazda did introduce the RX-8 in 2003 and we got it. For many Mazda

  • fans, the heavier less sleek and less powerful RX-8 was no substitute for the legendary RX-7.

  • The engine was more fuel efficient and had better emissions ratings, but at the cost

  • of less torque. Problems with failure on the apex seals. And in some cases on the first

  • gen cars, total engine failure. Even increased fuel efficiency couldn't save the RX-8 from

  • the economic crash of 2008. And it was retired in 2012. While the RX-7 is no longer in production

  • it has left a lasting impression in the automotive world and in all of our hearts. The RX-7 was

  • a constant presence in the 24 hours of Le Mans endurance race. From its first missed

  • by a second to qualify in 1979. To its eventual 1991 dominance with the iconic 787b. Still

  • one of the most beautiful cars to grace the circuit. The RX-7 dominated the IMSA GTU series

  • for ten solid years. From 1982 though '92. And won more IMSA races than any other model.

  • It even made an appearance in eleventh place at the world rally championship in 1991. Not

  • bad for a car three quarters the size of a Corvette with an engine prone to backfiring

  • and burning through apex seals. Every few years Mazda teases us with news of a new rotary

  • or a new RX-7. But so far they've not returned their classic. Here's hoping that one day

  • they'll make it efficient enough to pass new emissions standards and still retain the pure

  • fun of the old one. This is everything you need to know to get up to speed on the Mazda

  • RX-7. Please click to subscribe. Comment down below. How are we doing? Do you like RX-7's?Are

  • FD's worth the price now? What's your favorite generation of RX-7? Let us know. Whoo.

Affordable, sleek and light as a feather. It bursts onto the scene just as the world

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RX7 - 知っておきたいことをすべてお教えします。 (RX7 - Everything You Need to Know | Up To Speed)

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    Mike.J.Tsai に公開 2021 年 01 月 14 日
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