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Old 07-13-2017, 03:11 AM   #81
JerryJS8
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Join Date: Sep 2004
Location: Normal Saxony
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If this isn't going to be a rally car, rather a performance daily driver, I have to concentrate on the things that would otherwise turn shifting into a tedious chore. Bottom line, I want a final drive ratio that doesn't inconveniently leave me in the middle of two gears at speed limits, the most important being 50 and 130 km/h.

Using the values above and this website http://www.apexgarage.com/tech/gear_ratios.shtml I came up with the following shifting and cruising points:

Shifting speeds @3000 RPMs with final drive ratio: 4,10:1

1st to 2nd
2nd to 3rd
3rd to 4th
4th to 5th
M-46
21km/h
39km/h
61km/h
84km/h
M-90
24km/h
41km/h
61km/h
84km/h


Shifting speeds @3000 RPMs with final drive ratio: 3,54:1

1st to 2nd
2nd to 3rd
3rd to 4th
4th to 5th
M-46
24km/h
45km/h
71km/h
97km/h
M-90
27km/h
47km/h
70km/h
97km/h


Obviously shifting points aren't set in stone, but the cruising speeds are...

RPMs @ common cruising speeds with final drive ratio: 4,10:1

30km/h
50km/h
100km/h
130km/h
M-46
2nd @ 2300 or 3rd @ 1500
3rd @ 2450 or 4th @ 1800 or 5th @ 1400
5th @ 2800
5th @ 3700
M-90
2nd @ 2200 or 3rd @ 1500
3rd @ 2450 or 4th @ 1800 or 5th @ 1450
5th @ 2900
5th @ 3750


RPMs @ common cruising speeds with final drive ratio: 3,54:1

30km/h
50km/h
100km/h
130km/h
M-46
2nd @ 2000 or 3rd @ 1300
3rd @ 2100 or 4th @ 1550
5th @ 2450
5th @ 3200
M-90
2nd @ 1900 or 3rd @ 1300
3rd @ 2150 or 4th @ 1550
5th @ 2500
5th @ 3250
__________________
- 1987 244 (hand-me-down first car)
- 1990 744 (white with red leather)
- 1992 965 (green with tan leather)
- 1990 744 16v (pegleg drift can)
- 1992 480 (Renault disaster)

- 1989 745 16v
- 1991 744 (SE) 16v Turbo

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Last edited by JerryJS8; 09-11-2017 at 06:28 AM.. Reason: Formatting
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