This is assuming you are running stock sized tires on each car.

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

55 . . . . . . . . 2425 . . . . . . . . 2365 . . . . . . . 2500 . . . . . . .2305

60 . . . . . . . . 2645 . . . . . . . . 2580 . . . . . . . 2730 . . . . . . .2515

65 . . . . . . . . 2865 . . . . . . . . 2795 . . . . . . . 2955 . . . . . . .2720

70 . . . . . . . . 3085 . . . . . . . . 3010 . . . . . . . 3185 . . . . . . .2930

75 . . . . . . . . 3310 . . . . . . . . 3230 . . . . . . . 3410 . . . . . . .3140

80 . . . . . . . . 3530 . . . . . . . . 3440 . . . . . . . 3640 . . . . . . .3350

85 . . . . . . . . 3750 . . . . . . . . 3660 . . . . . . . 3865 . . . . . . .3560


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.

Gear . . . . AWD DSM. . . . . . . EVO VIII. . . . . . . . EVO IX. . . . . . . . EVO MR

1st . . . . . 34.4 (3800) . . . . . 40.0 (4700) . . . . 42.1 (4900) . . . .39.8 (4700)

2nd . . . . . 62.8 (4650) . . . . 60.1 (5150) . . . . 60.1 (5200) . . . .59.6 (5200)

3rd . . . . . 94.8 (5250) . . . . . 83.2 (5150) . . . . 81.1 (5300) . . . .80.8 (5350)

4th . . . . . 126.9 (5600) . . . 113.6 (4900) . . . 106.9 (4850) . . . .105.3 (5500)

5th . . . . . 158.7 (N/A) . . . . 162.7 (N/A) . . . . 153.9 (N/A) . . . . .133.7 (5600)

6th . . . . . N/A (N/A) . . . . . . . . N/A (N/A) . . . . . . N/A (N/A) . . . . .167.1 (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.

 

Don't forget the JDM close-ratio gear box!!

I just got the JDM 4th/5th gear in today. The lower ratio 4/5 should hopefully drop 1/4 mile times by 0.2 sec.

Cheers,

Gary
Gruppe-S

 

Tell me the ratio and I will plug it into my data sheet! I also have data for the HKS 4.111 final drive and the 3.84 final drive ratio that is available.

Keith

 

Very cool data acquisition..

 

1.096 4th, 0.825 5th. I'm not even sure if the gears will drop in. If they don't I have some ideas to get it to work (we've done the same thing with some other transmissiones such as Subaru 5mt). I'll keep everyone posted.

cheers,

Gary
Gruppe-S

 

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.

 

Looking at the data, for anyone trapping above 125 that wants to limit max RPM to a reasonable level (8000 or so) these gears from Gruppe-S would be perfect! For anyone running stock block, or built stroker but making heavy power this gear set should improve 1/4 mile times while making highway driving unbearable! Can you imagine a long highway trip spent at 4200 RPM? I would be deaf at the end of the trip

Looks like if you are trapping under 112 mph they will help your 1/4 mile times, or if you are trapping more than 125 mph they will help your 1/4 mile times..... but in between 112 mph and 125 mph trap speeds you will be making an extra gear change that would not be required with the stock VIII gear set, so it may slow you down a bit.

Keith

 

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.

 

good info

 

Good info!!

 

thanx for the info, fourdoor!

 

I just noticed something...... the JDM close ratio 5 speed gears give it ratios VERY similar to the first 5 gears in the six speed MR transmission. This may help explain Warrtalons extrodinary drag times..... if the close ratio 5 speed would gain you 2 tenths in the 1/4 mile, and the MR has very similar ratios for the first 5 gears it would make sence that the MR would be faster in the 1/4 mile (with a good driver) than a regular EVO with the same driver.

Keith

 

Very nice Keith. I have often wondered about the 4.111 gear set. Thats a nice jump 125 mph in 4th. I think I need this now.

 

The problem with lowering the speed / raising the RPM in 4th is you run out of gear extremely fast. I am spinning my puny little car to 8,100+ through the traps already. Thats with stock Evo 8 gears. I couldn't imagine making that even worse.

 

You are already on the verge of having to shift into 5th. When you reach that point where you have to shift into 5th anyway, the new shorter ratio gears (or the 1-5 in the 6 speed) will become an advantage.

Keith