Speed vs rpms - Toyota Yaris Forums

CrankyOldMan · 03-18-2012, 12:18 PM

I made a spreadsheet for my gearbox modifications to find out the different top end speeds for each gear. I also included a graph that shows the RPM drop between gears--both from 6000 RPM (6500 is the rev limit) and from the RPM that will land on 4000 (the lower limit of the power band is around 4200). The stock gearbox is pretty terrible between 1-2 and 4-5. These charts show the approximate speed that you can shift, either before redline, or to land on the sweet spot. Note that in either case, it's impossible to land on 4k in second gear due to the rev limit.

The first few times you take it up to 6k RPM, it's going to feel like it might explode, but it's still within its "intended" operating range. The way the chart works is: the numbers along the 6000 RPM line are your safe-ish limit. The numbers along the 4000 RPM line are your target shift points to maximize acceleration in the next gear.

Stock gearing:

To help reduce the RPM drop between 1-2, I'm using the Celica/Yaris RS gears for 1st through 4th and final drive. To make 5th gear less useless, I'm using a Matrix/Vibe/Corolla 5th gear set.

My custom gearbox:

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03-18-2012, 12:18 PM	#9
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	I made a spreadsheet for my gearbox modifications to find out the different top end speeds for each gear. I also included a graph that shows the RPM drop between gears--both from 6000 RPM (6500 is the rev limit) and from the RPM that will land on 4000 (the lower limit of the power band is around 4200). The stock gearbox is pretty terrible between 1-2 and 4-5. These charts show the approximate speed that you can shift, either before redline, or to land on the sweet spot. Note that in either case, it's impossible to land on 4k in second gear due to the rev limit. The first few times you take it up to 6k RPM, it's going to feel like it might explode, but it's still within its "intended" operating range. The way the chart works is: the numbers along the 6000 RPM line are your safe-ish limit. The numbers along the 4000 RPM line are your target shift points to maximize acceleration in the next gear. Stock gearing: To help reduce the RPM drop between 1-2, I'm using the Celica/Yaris RS gears for 1st through 4th and final drive. To make 5th gear less useless, I'm using a Matrix/Vibe/Corolla 5th gear set. My custom gearbox: