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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 04-15-2012, 08:33 PM   #1
Flaboy239
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My Ride: 2004 330ci
4.10 gears in a 6 speed...

I want more low end torque without risking my engine so I'm thinking of swapping out my 3.46 gears and installing some 4.10's or something close to it. Who's done it and what are my pros and cons?
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Old 04-15-2012, 08:55 PM   #2
Rob43
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Here, if you haven't seen this, this is what you need to get started. Just input any combination you want.


http://www.bokchoys.com/differential...calculator.htm



Good luck,
Rob
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Old 04-15-2012, 09:10 PM   #3
Flaboy239
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Thanks! That helps. 3600rpm at 80mph isn't all that great but it would be a beast around town. It seems to be the only way I'm going to get the torque I want without sacrificing my engine.
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Old 04-15-2012, 09:13 PM   #4
B_Cyrus
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you can't legally go 100mph in the US, so why bother working on top end speed?
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Old 04-15-2012, 09:24 PM   #5
Flaboy239
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Ya I rarely go 100mph. Your asking to go to jail. Not that I don't still do it at times tho. I love speed but I prefer useable 0-60 speed over top end speed that is basically useless. My only concern was cruising around town at 4000rpm and first gear being to touchy to even use.
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Old 04-16-2012, 03:50 PM   #6
MSportBMW
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Theres another calculator on diffsonline mske sure you punch the numbers in for an estimate of running/gear speeds. But 4.1 with a 6 speed should be fine
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