4.1 Diffs

EricSMG · Thu, Nov-05-2009, 03:38:02 PM

Quote:

Originally Posted by John Johns

Fascinatio
ng discussion on 4.45, but still curious about specs on setting uo diff. Thanks.

A diff shop should know what specs to set it up with as a diff is a diff is a diff. Nothing special about a BMW diff. Two gears meshing is two gears meshing. Bearing preload is bearing preload.

Find a different shop, perhaps?

epbrown · Thu, Nov-05-2009, 11:04:52 PM

Quote:

Originally Posted by basar13

because top speed is still enough with 4.45 and the acceleration would be a lot better

I get 8% difference to the 4.1. The 3.91 is 8% different to the 3.62 and people routinely say it's not worth it.

Quicke46 · Thu, Nov-05-2009, 11:47:36 PM

anyone know of any creditable local shops in the central Florida area???? I want this done ASAP.

pje · Fri, Nov-06-2009, 12:40:30 AM

Give Advanced Driveline here in Orlando a call ..407-299-1100 ....they do top notch work and i have had alot of custom work done by them ...I plan on having them do my gearing when my e46 comes in ...

Quicke46 · Sat, Nov-07-2009, 11:55:27 AM

Quote:

Originally Posted by pje

Give Advanced Driveline here in Orlando a call ..407-299-1100 ....they do top notch work and i have had alot of custom work done by them ...I plan on having them do my gearing when my e46 comes in ...

thanks

will do...

DXB. · Sat, Sep-15-2012, 08:33:46 PM

Interesting reading. I have taken my time to soak up all the information and opinions in this thread.

0.2-0.3 in the 1/4 mile to me is a "big" improvement.

I have read differing opinions on trap speeds. Will the trap speed be higher with the 4.1. I would have thought so but would like confirmation.

Will the 4.1 accelerate harder & faster 100-150 than stock?

Kind regards guys

Thu, Nov-05-2009, 11:47:36 PM	#143
Quicke46 I'm in the Pepper Bmer... Join Date: Jan 2007 Posts: 802 Reputation: 0 Location: Clearwater & New Jersey	anyone know of any creditable local shops in the central Florida area???? I want this done ASAP. __________________ My ///Mph's are protected by the badge... E46 TiAg ///M3 : Smoked Umnitza LED Tails, BBS RS-GT(Powdercoated Black), Interior Linked LED Angel Eyes, 8000K HID Headlights, ZHP Shift Knob, BFG KDW2's, Shark Injector

Sat, Sep-15-2012, 08:33:46 PM	#146
DXB. Registered User Join Date: Apr 2012 Posts: 90 In the garage: '03 BMW M3 E46 Reputation: 0	Re: 4.1 Diffs Interesting reading. I have taken my time to soak up all the information and opinions in this thread. 0.2-0.3 in the 1/4 mile to me is a "big" improvement. I have read differing opinions on trap speeds. Will the trap speed be higher with the 4.1. I would have thought so but would like confirmation. Will the 4.1 accelerate harder & faster 100-150 than stock? Kind regards guys __________________ Last edited by DXB.; Sat, Sep-15-2012 at 09:04:54 PM. Reason: Rubbish predictive I phone text

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Fri, Nov-06-2009, 12:40:30 AM	#144
pje Registered User Join Date: May 2009 Posts: 831 In the garage: '85 BMW 318 '01 FORD F-350 '06 BMW M3 Reputation: 0 Location: orlando	Give Advanced Driveline here in Orlando a call ..407-299-1100 ....they do top notch work and i have had alot of custom work done by them ...I plan on having them do my gearing when my e46 comes in ...