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Forum: General Maintenance and Repair

12-19-2006, 10:33 AM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

Excellent article, and 5.2% improvement is great....

Excellent article, and 5.2% improvement is great. :thumbup:

Forum: General Maintenance and Repair

12-01-2006, 05:42 AM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

In this case, bimmer forums have batted around...

In this case, bimmer forums have batted around $200 as an average cost of a used diff, plus changing a pumpkin with separate half shafts is fairly easy compared to a live-axle setup or worse, a FWD...

Forum: General Maintenance and Repair

11-30-2006, 06:44 PM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

The dotted lines are existing gear ratios, the...

The dotted lines are existing gear ratios, the other lines are proposed. The old 5th and new 4th are about equal. Then there is 1 or 2 more gears (depending on if I do the 6-spd).

If the BSFC...

Forum: General Maintenance and Repair

11-30-2006, 01:17 PM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

OK, it looks like I'm in need of some more...

OK, it looks like I'm in need of some more edumacation.

I can easily calculate the rpms vs mph for each gear combo (e.g. 60 mph in 5th goes from 2711 to 2295).

I have no idea where to get a...

Forum: General Maintenance and Repair

11-30-2006, 07:40 AM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

I would agree, though the car in question has a...

I would agree, though the car in question has a fairly torquey 2.5L straight 6. The current first gear is so short (final ratio is 14.64) it's almost useless when I'm not pulling stumps. :)
...

Forum: General Maintenance and Repair

11-30-2006, 06:51 AM

Replies: 140

taller tranny

Views: 19,705

Posted By Silveredwings

very tempting...

Wow, there's some great info here. Now I'm considering doing something like this.

The bimmer is geared extremely short (IMHO): final drive is 3.46:1

5-Speed ratios:
1 - 4.23
2 - 2.52
3 -...

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