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Want terminal speed should I expect in each gear

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With standard tyres -245/45ZR16 on 8.5J X 16 rims, the manual twin turbo (final drive ratio 3.69:1) the turbo achieves the following speeds:

Gear MPH RPM

1st 43 7200

2nd 72 7200

3rd 107 7200

4th 139 7200

5th 155 6000 with speed limiter

5th 165 6400 without speed limiter

5th 186 7200 intermittent theoretical, rev limited

 

The equivalent table for the non turbo, final drive ratio 4.083:1 is:

Gear MPH RPM

1st 39 7200

2nd 65 7200

3rd 97 7200

4th 126 7200

5th 148 6300 Power limited

5th 168 7200 intermittent theoretical, rev limited

 

The automatic ratios are: 1st 2.78, 2nd 1.54, 3rd 1.00, 4th 0.69, so results for the turbo are

(Maximum, as actual speeds will depend on torque converter slip):

Gear MPH RPM

1st 48 7200 Held in first

2nd 87 7200 Held in second

3rd 139 7200 Held in 3rd, overdrive off

4th 155 5500 with speed limiter

4th 178 6400 without speed limiter, not attainable by stock TT

4th 201 7200 intermittent theoretical, rev limited

 

The equivalent table for the non turbo automatic.

Gear MPH RPM

1st 43 7200 Held in first

2nd 80 7200 Held in second

3rd 126 7200 Held in 3rd, overdrive off

4th ?? ?? maximum??

4th 161 6400 not attainable by stock NA

4th 182 7200 intermittent theoretical, rev limited

  • Quote
    • Author

    MMMMMM my speedo is out then as I'm registering 120 in 3rd and 150 in 4th then I ran out off track.

     

    All on safety boost. mmmmm Will know for sure when I put my snooper with GPS back in.

  • Quote

    The stock speedo goes really out after 80mph.

    I was going over 100mph according to the speedo but the GPS system I have was saying 90ish.

     

    Upto around 70-75mph they where virtually identical

  • Quote

    As on a previous thread, when comparing GPS speed with speedo make sure your on a level road or it will be out on the GPS. I know because I have tried it and there are definite discrepancy's between level and flat roads using GPS speed.

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