3.91 Differential?? Need Help Quick - BMW Forum

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		BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)
3.91 Differential?? Need Help Quick

3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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03-26-2005, 03:52 PM	#1 (permalink)
jrhaile What? No Autobahn? Join Date: Jan 2004 Location: Spokane, Wa Car: 2001 M5 Posts: 3,525 Photos:	Is this a good ratio diff for a car with a turbo? __________________

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03-26-2005, 04:27 PM	#2 (permalink)
Johnathan_Hess /Banned Join Date: Sep 2004 Location: San Diego, California Car: Posts: 2,297 Photos:	3.91 is pretty damn high. You'd probably ALWAYS be in boost, so it might be a good thing for a car with a turbo, but you'd suffer big time on gas mileage. Is it a LSD?

03-26-2005, 04:29 PM	#3 (permalink)
jrhaile What? No Autobahn? Join Date: Jan 2004 Location: Spokane, Wa Car: 2001 M5 Posts: 3,525 Photos:	yeah it would be.. NM. We're going to get a 3.73LSD. Seems to be the best we can get for this turbo e30. this is the last piece that we need. Right now it has a 4.10LSD and it blows for mileage and winding it out. It's awesome for drag racing though lol... __________________

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