Renesis assembly video
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From: NW New Jersey
Renesis assembly video
I thought you guys might like to see this. http://www.rx-8.mazda.co.jp/products/driving10.html The link for the video is at the bottom of the page.
Joined: Oct 2001
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From: Fort Branch, Indiana
I guarantee you it isnt done that slow 
I work for a Japanese automotive manufacturer and I see how they put stuff together LOL God i do love the rotor jig tho, that'd be sweet to have one. BTW: the manufacturer I work for is Toyota
I work for a Japanese automotive manufacturer and I see how they put stuff together LOL God i do love the rotor jig tho, that'd be sweet to have one. BTW: the manufacturer I work for is Toyota
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From: Saskatoon, SK & Montreal, PQ
Originally posted by MIKE-P-28
I guarantee you it isnt done that slow I work for a Japanese automotive manufacturer and I see how they put stuff together LOL God i do love the rotor jig tho, that'd be sweet to have one. BTW: the manufacturer I work for is Toyota
I guarantee you it isnt done that slow
I work for a Japanese automotive manufacturer and I see how they put stuff together LOL God i do love the rotor jig tho, that'd be sweet to have one. BTW: the manufacturer I work for is Toyota
Toyota is all about speedy, efficient mass-production. This is very possible with modern automation, and even the hands-on stuff is done quickly.
Rotaries, on the other hand, are often hand assembled even in the factories. I do suspect you're right about the speed. Chances are they slowed down their actions so the camera could pick it up better, making a video that made sense, not just a blur of motion.
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Why cant I see it 
.
~T.J.
EDIT: I cant see any of the damn videos from that site
. I went to the main page and tried to watch the video link they have there, it doesnt work either. Damn this **** computer of my friends, haha. Anyway, I like the rotor shaped shift **** on the front page 
.
.~T.J.
EDIT: I cant see any of the damn videos from that site
. I went to the main page and tried to watch the video link they have there, it doesnt work either. Damn this **** computer of my friends, haha. Anyway, I like the rotor shaped shift **** on the front page .
Last edited by RotorMotorDriver; Feb 18, 2003 at 07:33 PM.
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I read your email
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From: NW New Jersey
By JAMES B. TREECE | Automotive News
HIROSHIMA, Japan - It is a surprisingly low-tech finale for such a high-tech process.
In a sealed, soundproofed and temperature-controlled room at Mazda's engine plant No. 2 here, parts that elsewhere have been engineered and manufactured using computers are painstakingly assembled by hand into the Renesis engines that power the RX-8.
Working with palpable concentration, seven workers hand-assemble rotors, housings, eccentric shafts, stationary gears, seals, bolts and other parts into the final engine. Time per engine: 35 to 40 minutes.
Executives say production could be speeded up but declined to give specifics.
"We could automate it. The question is cost," said Hisakazu Imaki, Mazda's executive vice president and chief engineering and manufacturing officer.
Although it is possible for computer technology to emulate the workers' craftsmanship, doing so would be hugely expensive, he said.
The new Renesis rotary engine features a number of design changes that allowed Mazda to eliminate the turbocharger that had pushed up the price of the former RX-7's rotary engine.
While incorporating those design changes, Mazda introduced several manufacturing changes as well. Here are two:
1. To cast the rotor, which is shaped like a triangle with slightly rounded corners, Mazda in the past poured molten metal into the top of a mold designed to produce two stacks of three rotors each. But the metal cooled at different speeds in different parts of each rotor, leading to different weight distributions.
The weight differences were slight, less than the weight of two pennies, but enough to cause an uneven rotor rotation. Mazda had to drill tiny holes in the rotor to rebalance it, an inelegant solution at best.
Now, Mazda uses a mold that makes only three rotors at a time and pours the molten metal into the center of the rotor. From there, it spreads out evenly toward the three points of each triangular rotor and the cooling occurs evenly in each point.
2. Testing has been computerized. One engine out of every 100 is sent to a coordinate measurement room, where precision equipment measures the dimensions of each part to ensure that all of the drilling and machining is exact. Formerly, tests of the RX-7 engine included a master operator rotating the engine's rotor to feel whether it seemed balanced.
Every engine is tested after assembly. The tests include one that measures compression in each stage of the engine's cycle: intake, fuel compression and exhaust.
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
HIROSHIMA, Japan - It is a surprisingly low-tech finale for such a high-tech process.
In a sealed, soundproofed and temperature-controlled room at Mazda's engine plant No. 2 here, parts that elsewhere have been engineered and manufactured using computers are painstakingly assembled by hand into the Renesis engines that power the RX-8.
Working with palpable concentration, seven workers hand-assemble rotors, housings, eccentric shafts, stationary gears, seals, bolts and other parts into the final engine. Time per engine: 35 to 40 minutes.
Executives say production could be speeded up but declined to give specifics.
"We could automate it. The question is cost," said Hisakazu Imaki, Mazda's executive vice president and chief engineering and manufacturing officer.
Although it is possible for computer technology to emulate the workers' craftsmanship, doing so would be hugely expensive, he said.
The new Renesis rotary engine features a number of design changes that allowed Mazda to eliminate the turbocharger that had pushed up the price of the former RX-7's rotary engine.
While incorporating those design changes, Mazda introduced several manufacturing changes as well. Here are two:
1. To cast the rotor, which is shaped like a triangle with slightly rounded corners, Mazda in the past poured molten metal into the top of a mold designed to produce two stacks of three rotors each. But the metal cooled at different speeds in different parts of each rotor, leading to different weight distributions.
The weight differences were slight, less than the weight of two pennies, but enough to cause an uneven rotor rotation. Mazda had to drill tiny holes in the rotor to rebalance it, an inelegant solution at best.
Now, Mazda uses a mold that makes only three rotors at a time and pours the molten metal into the center of the rotor. From there, it spreads out evenly toward the three points of each triangular rotor and the cooling occurs evenly in each point.
2. Testing has been computerized. One engine out of every 100 is sent to a coordinate measurement room, where precision equipment measures the dimensions of each part to ensure that all of the drilling and machining is exact. Formerly, tests of the RX-7 engine included a master operator rotating the engine's rotor to feel whether it seemed balanced.
Every engine is tested after assembly. The tests include one that measures compression in each stage of the engine's cycle: intake, fuel compression and exhaust.
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
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From: valdosta,ga
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
yea try that on my engine....lol
peace
The wine barely rippled.
yea try that on my engine....lol
peace
Thread Starter
I read your email
Joined: Jan 2002
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From: NW New Jersey
Originally posted by inittab
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
My ex-gf's Dad was telling me about when he and his Dad went shopping for a new car back in 1981 when the RX-7 had just come out. He said that they took one for a test drive, and the first thing his Dad did was grind the starter because the car was running so smooth and quiet his Dad didnt even know it was running . I thought that was cool . By the way, I tuned my carb, and my car idles at 750 RPMs rock solid, starts right up and runs smooth as a kitten purrs. I have actually forgotten its running twice since them and just took my foot off the clutch (foot always on brake though ) in parking lots cause I was distracted by other things, I didnt even think about it cause I couldnt hear it, haha .
~T.J.
. I thought that was cool . By the way, I tuned my carb, and my car idles at 750 RPMs rock solid, starts right up and runs smooth as a kitten purrs. I have actually forgotten its running twice since them and just took my foot off the clutch (foot always on brake though ) in parking lots cause I was distracted by other things, I didnt even think about it cause I couldnt hear it, haha .~T.J.
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From: Saskatoon, SK & Montreal, PQ
Originally posted by inittab
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
To demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled.
Joined: Mar 2001
Posts: 31,819
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From: https://www2.mazda.com/en/100th/
Originally posted by inittab
[BTo demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled. [/B]
[BTo demonstrate to a group of reporters the reduced vibrations of the new engine, testers placed a glass of wine atop an engine, then revved it to 5,000 rpm, which they said would be the typical speed on a Japanese highway.
The wine barely rippled. [/B]
mike
callin' tokyo
Joined: Dec 2002
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From: Windsor, Ontario
I remember seing a documentary/informortial for the M series Bimmers and the guys assembling the engines were working in slooooooooow motion.
Sure wish I could see the Mazda video,....
Sure wish I could see the Mazda video,....
