Bmw E30 325i Diff Ratio
Cross-breeding The E28 also used the small case diff, which can be fitted to the E30, but the rear cover and output flanges must be changed to 325i E30 items. Long ratio diffs from 525e's might be useful for engine swappers and are more easily obtainable than the long ratio E30 units. BMW E30 Differential Ratio Guide If you're swapping the drive train in your RWD BMW you will likely want to swap out the rear differential to one with a ratio that suits the transmission and your driving characteristics.
What is your ideal differential ratio for the e30 06-15-2017, 06:42 PM Discuss the different ratios, just curious to see what everyone prefers 5 Voters 2.79 40.00%. I'm looking to upgrade my diff for better acceleration. I've heard of e30 M3 guys using a 4.45, but has anyone tried a 4.56 or 4.75.
I've got the typical 4.10 diff from and M3 but I'm looking to build one with more aggressive gears. With the 4.10 I'm primarily using only 3rd and 4th gear, and occasionally 5th on tracks with very long straights. Pelican Technical Article: BMW E30 3 Series Specification Pelican Technical Article.
A differential transfers power from the driveshaft to the wheels, while allowing the wheels to spin at different rates around corners. Most 325i cars ship with a 3.73 "limited slip" differential ("LSD"), where the 325e/325 cars ship with an "open" differential, with a ratio that favours fuel economy over power and handling. A great upgrade for drivers looking for added acceleration and grip for the E30 325i and E30 M3! A differential upgrade/rebuild for your E30 delivers performance far above the original factory spec.
Diffsonline has 20 years of expertise in BMW differential upgrades and rebuilding. BMW E30 Differential Guide - Free download as PDF File (.pdf), Text File (.txt) or read online for free. BMW E30 Differential Guide Guía de diferenciales de BMW E30 y similares.
The E30 was fitted with two sizes of differential. The larger is known as a medium case (Type 188), and was used on 325 models. It has a crown wheel diameter of 188mm.
The smaller case was used on 4 cylinder and 320i. BMW Differentials for E30 325, M3 All differentials are built to order and we are currently running at least 2. Bimmerforums is the preferred online BMW Forum and community for BMW owners.
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