tech article: tranmission gear ratios compared
gear ratio transmission comparison between evo and dsm
Originally Posted by
Fourdoor
This is assuming you are running stock sized tires on each car. New info added, "JDM CR" means JDM close ratio 5 speed.
For gas milage considerations, here is a break down top gear RPM at various cruiseing speeds on the highway.
speed . . . AWD DSM. . . . . EVO VIII. . . . . EVO IX. . . . . EVO MR . . . . . .JDM CR
55 . . . . . . . . 2425 . . . . . . . . 2365 . . . . . . . 2500 . . . . . . .2305. . . . . . .2710
60 . . . . . . . . 2645 . . . . . . . . 2580 . . . . . . . 2730 . . . . . . .2515. . . . . . .2960
65 . . . . . . . . 2865 . . . . . . . . 2795 . . . . . . . 2955 . . . . . . .2720. . . . . . .3205
70 . . . . . . . . 3085 . . . . . . . . 3010 . . . . . . . 3185 . . . . . . .2930. . . . . . .3450
75 . . . . . . . . 3310 . . . . . . . . 3230 . . . . . . . 3410 . . . . . . .3140. . . . . . .3700
80 . . . . . . . . 3530 . . . . . . . . 3440 . . . . . . . 3640 . . . . . . .3350. . . . . . .3945
85 . . . . . . . . 3750 . . . . . . . . 3660 . . . . . . . 3865 . . . . . . .3560. . . . . . .4190
And for full throttle acceleration considerations, here is a break down of what speed you are going at the top of each gear just befor shifting to the next higher gear (assuming shifting at stock redline of 7,000 RPM) and what RPM you enter the next higher gear at. I made the assumption that the JDM CR gears would be added to the EVO VIII 5 speed instead of to the IX 5 speed since the IX already has closer gears than the VIII.
Gear . . . . AWD DSM. . . . . . . EVO VIII. . . . . . . . EVO IX. . . . . . . . EVO MR. . . . . . . . JDM CR
1st . . . . . 34.4 (3800) . . . . . 40.0 (4700) . . . . 42.1 (4900) . . . .39.8 (4700) . . . . . 40.0 (4700)
2nd . . . . . 62.8 (4650) . . . . 60.1 (5050) . . . . 60.1 (5200) . . . .59.6 (5200) . . . . . . 60.1 (5050)
3rd . . . . . 94.8 (5250) . . . . . 83.2 (5150) . . . . 81.1 (5300) . . . .80.8 (5350) . . . . . 83.2 (5450)
4th . . . . . 126.9 (5600) . . . 113.6 (4900) . . . 106.9 (4850) . . . .105.3 (5500) . . . .106.9 (5250)
5th . . . . . 158.7 (N/A) . . . . 162.7 (N/A) . . . . 153.9 (N/A) . . . . .133.7 (5600) . . . . .142.0 (N/A)
6th . . . . . N/A (N/A) . . . . . . . . N/A (N/A) . . . . . . N/A (N/A) . . . . .167.1 (N/A) . . . . . . .N/A (N/A)
Keith
PS: Anyone wants the Exel file I used for calculating the speeds (based on tire diameter, gear ratio's, and final drive ratio) PM me with your e-mail address.
Originally Posted by
Fourdoor
OK guys, here is the data for all previous EVO setups with a swap over to HKS 4.111 gear set.
This is assuming you are running stock sized tires on each car. New info added, "JDM CR" means JDM close ratio 5 speed.
For gas mileage considerations, here is a break down top gear RPM at various cruising speeds on the highway.
speed . . . EVO VIII. . . . . . EVO IX. . . . . . . EVO MR . . . . . .JDM CR
55 . . . . . . . . 2150 . . . . . . . . 2270 . . . . . . . . 2070 . . . . . . . .2460
60 . . . . . . . . 2345 . . . . . . . . 2480 . . . . . . . . 2255 . . . . . . . .2685
65 . . . . . . . . 2540 . . . . . . . . 2685 . . . . . . . . 2445 . . . . . . . .2910
70 . . . . . . . . 2735 . . . . . . . . 2890 . . . . . . . . 2630 . . . . . . . .3135
75 . . . . . . . . 2930 . . . . . . . . 3095 . . . . . . . . 2820 . . . . . . . .3355
80 . . . . . . . . 3125 . . . . . . . . 3300 . . . . . . . . 3005 . . . . . . . .3580
85 . . . . . . . . 3320 . . . . . . . . 3510 . . . . . . . . 3195 . . . . . . . .3805
And for full throttle acceleration considerations, here is a break down of what speed you are going at the top of each gear just before shifting to the next higher gear (assuming shifting at stock redline of 7,000 RPM) and what RPM you enter the next higher gear at. I made the assumption that the JDM CR gears would be added to the EVO VIII 5 speed instead of to the IX 5 speed since the IX already has closer gears than the VIII.
Gear . . . . EVO VIII. . . . . . . . . EVO IX. . . . . . . . . . EVO MR. . . . . . . . . . JDM CR
1st . . . . . 44.1 (4700) . . . . . 46.3 (4900). . . . . . .44.4 (4700) . . . . . . 44.1 (4700)
2nd . . . . 66.2 (5050) . . . . . . 66.2 (5200) . . . . . .66.4 (5200) . . . . . . 66.2 (5050)
3rd . . . . . 91.7 (5150) . . . . . . 89.4 (5300) . . . . .90.0 (5350) . . . . . . 91.7 (5450)
4th . . . . 125.2 (4900) . . . . . 117.7 (4850) . . . .117.3 (5500) . . . . . .117.7 (5250)
5th . . . . 179.2 (N/A) . . . . . . 169.6 (N/A) . . . . . .149.0 (5600) . . . . . .156.4 (N/A)
6th . . . . N/A (N/A) . . . . . . . . . N/A (N/A) . . . . . . .186.2 (N/A) . . . . . . . . . .N/A (N/A)
Keith
PS: Anyone wants the Excel file I used for calculating the speeds (based on tire diameter, gear ratio's, and final drive ratio) PM me with your e-mail address.
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