6 speed tranny?
11-11-04, 12:05 AM
#26
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-
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-
11-11-04, 12:45 AM
#27
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)
-Max
(fearing that I will read about how Jamaican accents make cars faster in another RX7Club.com thread three months from now)
11-11-04, 12:51 AM
#29
Super Snuggles
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.
11-11-04, 12:58 AM
#30
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 *** **** you're smoking there Mr. Cooper!
11-11-04, 02:47 AM
#32
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
11-11-04, 03:44 AM
#33
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Originally Posted by jimlab
Fair enough.
Personally, I get sick of reading posts asking about 6-speeds when the asker knows ****-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".
Personally, I get sick of reading posts asking about 6-speeds when the asker knows ****-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".
11-11-04, 08:42 AM
#35
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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)
-Max
(fearing that I will read about how Jamaican accents make cars faster in another RX7Club.com thread three months from now)
11-11-04, 10:13 AM
#37
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Originally Posted by SkEltAh
Dude.. I'm swapping the rotary out for a Jamaican tomorrow.
11-11-04, 10:50 AM
#39
Super Snuggles
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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ricardo.benin
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