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With standard tires -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, 400 hp at least. The automatic ratios are: 1st 2.78, 2nd 1.54, 3rd 1.00, 4th 0.69, so results for the turbo are:
1st 48 7200 held in 1st 2nd 87 7200 held in 2nd 3rd 139 7200 held in 3rd, OD off 4th 155 5500 with speed limiter 4th 178 6400 without speed limiter not obtainable in stock TT 4th 201 7200 intermittent theoretical, rev limited, 450 hp at least.
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