6 speed tranny?
i checked the old posts but couldnt find much... do they make 6 speed trannys for fd's?
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Originally Posted by pezking
i checked the old posts but couldnt find much... do they make 6 speed trannys for fd's?
why would you want a 6 speed? Th car already tops out at 183mph with 5 gears, and its geared perfectly for the eninge |
https://www.rx7club.com/showthread.php?t=365018
#21 covers it, and JimLab provided most of the answer. |
Originally Posted by Nick13B
why would you want a 6 speed?
Th car already tops out at 183mph with 5 gears, and its geared perfectly for the eninge Why ask why? Maybe he's going to use the car for something different than you. Changing the gearing effects more than top speed. I get sick of reading that stuff. |
Originally Posted by '98 Type RS
I get sick of reading that stuff.
Personally, I get sick of reading posts asking about 6-speeds when the asker knows fuck-all about gearing or why you'd use 6 gears instead of 5. All they seem to know is "6 is 1 better than 5". |
Originally Posted by jimlab
Fair enough.
Personally, I get sick of reading posts asking about 6-speeds when the asker knows fuck-all about gearing or why you'd use 6 gears instead of 5. All they seem to know is "6 is 1 better than 5". Good point |
Originally Posted by jimlab
All they seem to know is "6 is 1 better than 5".
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Originally Posted by travisorus rex
Vipers have six gears JIM.
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Originally Posted by jimlab
True, but for a good reason. :)
The only reason to go 6 spd is if you are doing an LS1/LT1 swap ;) |
Originally Posted by jimlab
Fair enough.
Personally, I get sick of reading posts asking about 6-speeds when the asker knows fuck-all about gearing or why you'd use 6 gears instead of 5. All they seem to know is "6 is 1 better than 5". |
Originally Posted by Nick13B
The only reason to go 6 spd is if you are doing an LS1/LT1 swap ;)
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Originally Posted by jimlab
In a Viper? ;)
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Originally Posted by Nick13B
why would you want a 6 speed?
Th car already tops out at 183mph with 5 gears, and its geared perfectly for the eninge the rx7 doesnt top at no 183mph, it only does 156. theres no one here that have gone even 170mph stock version |
i didnt read this post the hole way through and i used to be like him. Because i had started a post about finding the legendary six speed transmission and i did find it at rotary extreme where they use the stock 5 speed transmission and add an extra gear. But frankly if you got this car to go as fast as you can you have to think about alot of things.
doing 180-200mph on the highway is possible but extremely dangerous 2. unless your racing at a race track dont even think about it. 3. six thousand dollars for another gear sounds tempting (because its a six gear) but is ricidilous 4. a transmission does make your car faster cause of the extra gear but you need good suspension, tires, aerodynamics, downforce, handling, skill, horsepower. By the time youll end up in this project youll be up in the $30,000. For god sake just leave the six speed alone. |
Speaking of knowing fuck-all about 6-speeds, the GReddy gear set is a close ratio gear set. 6th gear is actually shorter than the original 5th gear, which means a lower top speed than stock.
darkphantom, you shouldn't post any more. |
both the 5 and six speed can have the same gear. on the final gear it was the same and we did get more speed out of the car?? thats the truth
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What in the hell are you babbling about?
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the 5 speed did 160 and the six speed did 171mph. all gears and final gear ratio was the same. just the addition of the six gear
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I repeat, what in the hell are you babbling about?
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a stock RX-7 may be drag limited to 156-159mph, but that doesn't mean thats it's top speed. In this case, the car's theoretical top speed is much higher than 159mph due to gearing. I can't remember what a stock FD gearing is limited to(183mph? Thought it was higher than that).
Like Jimlab said, you shouldn't post anymore Darkphantom. |
Originally Posted by ForceFed
183mph? Thought it was higher than that
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Originally Posted by darkphantom
the 5 speed did 160 and the six speed did 171mph. all gears and final gear ratio was the same. just the addition of the six gear
what u smokin anyways |
Originally Posted by jimlab
I repeat, what in the hell are you babbling about?
Ha ha. This thread is awesome. |
Originally Posted by darkphantom
i didnt read this post the hole way through and i used to be like him. https://www.rx7club.com/3rd-generation-specific-1993-2002-16/legendary-6-speed-transmission-352138/ Yet, you're still an idiot and a liability in other ways. And that's why the little red square next to your post count is red. :bigthumb: |
The stock ratios should be good for around 190mph or so on stock rims/tires. I think my car could possibly break the 200mph mark with my 285/40/18's in the back. Not that I'd try.
darkphantom, I won't go as far as to say you shouldn't post anymore ever but you need to research quite a bit more before posting. You're on the right track but you have a little more learning to go. |
Mazda never offered an RX-7 with a 6-speed transmission. Learn why a 6-speed transmission would be a benefit here:
http://auto.howstuffworks.com/transmission.htm Unfortunately, the costs outweigh the benefits for most people. The transmission is probably one of the last things on my list of "stuff to upgrade if I had too much money and wanted to spend it on my car." -s- |
I was riding in a stock FD one time and the driver had green shoes. The car only went 160 MPH. I got another ride in an FD and this time the driver had an Jamaican accent. The car went 171 MPH. Therefore, it is clear that Jamaican accents make your car faster.
-Max (fearing that I will read about how Jamaican accents make cars faster in another RX7Club.com thread three months from now) |
i want a semi with a 7 spd cuz that is 2 better than 5! :bigthumb:
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Originally Posted by maxcooper
I was riding in a stock FD one time and the driver had green shoes. The car only went 160 MPH. I got another ride in an FD and this time the driver had an Jamaican accent. The car went 171 MPH. Therefore, it is clear that Jamaican accents make your car faster.
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Originally Posted by maxcooper
I was riding in a stock FD one time and the driver had green shoes. The car only went 160 MPH. I got another ride in an FD and this time the driver had an Jamaican accent. The car went 171 MPH. Therefore, it is clear that Jamaican accents make your car faster. -Max (fearing that I will read about how Jamaican accents make cars faster in another RX7Club.com thread three months from now) That's some good ass shit you're smoking there Mr. Cooper! :D |
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Originally Posted by jimlab
I don't think we've seen enough data to support your theory. What color were the shoes of the driver with the Jamaican accent?
-Max :) |
Originally Posted by jimlab
Fair enough.
Personally, I get sick of reading posts asking about 6-speeds when the asker knows fuck-all about gearing or why you'd use 6 gears instead of 5. All they seem to know is "6 is 1 better than 5". |
Originally Posted by jimlab
What in the hell are you babbling about?
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Originally Posted by maxcooper
I was riding in a stock FD one time and the driver had green shoes. The car only went 160 MPH. I got another ride in an FD and this time the driver had an Jamaican accent. The car went 171 MPH. Therefore, it is clear that Jamaican accents make your car faster.
-Max (fearing that I will read about how Jamaican accents make cars faster in another RX7Club.com thread three months from now) |
Originally Posted by jimlab
especially with a taller tire (P275/40-17).
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Originally Posted by SkEltAh
Dude.. I'm swapping the rotary out for a Jamaican tomorrow.
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Originally Posted by '98 Type RS
I guess I'll give you that one.
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Originally Posted by Railgun69
That's only a +1. The overall diamater should be the same as a 50-16 shouldn't it?
P225/50-16 - 78.09" or 6.51 feet P275/40-17 - 80.62" or 6.72 feet It makes a noticeable difference when they're turning at ~2,710 rpm (redline in 5th). P225/50-16 - 200.49 mph P275/40-17 - 206.95 mph To calculate nominal tire height... Tire Width (mm) * (Profile / 100) * 2 / 25.4 + Wheel Diameter (in.) 225 mm * (.5) * 2 / 25.4 + 16 in. 8.56 in. + 16 in. = 24.86 in. To calculate nominal tire circumference... 24.86 in. * 3.14159 = 78.09" 78.09" / 12 = 6.51 feet To calculate wheel speed at X rpm in a given gear... Engine RPM / Transmission Ratio / Differential Ratio 8,000 rpm / 0.72 (5th gear) / 4.1 = 2,710 rpm To calculate nominal vehicle speed... Wheel RPM * Tire Circumference * 60 min./hr. * 5280 feet/mile 2,710 * 6.51 feet * 60 min./hr. * 5280 feet/mile = ~200.49 mph Keep in mind that this is just the gear limited top speed, not actual top speed. You still need enough power at the wheels after drivetrain losses to overcome wind and rolling resistance, and tires are not perfectly circular, obviously. Measuring the actual circumference of your tire will improve accuracy, but tires grow slightly at high speed, and traction is never 100%, so there will be some tire slip as well. Add in the inaccuracy of your analog tachometer and speedometer, and you'll see why you'll never reach the calculated top speed in a given gear. :) |
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