[Prev][Next][Index][Thread]

Re: Modifying an '88 528e

> From: Bob Van Epps <[email protected]>
> Subject: Modifying an 88 528e
> 
> Has anyone tried improving an 88 528e, automatic?  Is it worth it?  
> 
> What I want is better throttle response and acceleration so that I can 
> get out of situations, but I don't want to spend $1000's doing it.
> 
> ANSWER:  The best improvement that you can do is to replace the Differential
> with one from a 535 or 635.  There is an 11% improvement in torque with the 3.25
> ratio rear and 18% imprivrment with the 3.46.  A good chip will increase hp to
> 148 so for about $450 for the diff and $250 for the chip the personality of your
> car will change.

The '88 528e (with the super-eta motor, post 3/87 production, with the dual
exhaust pipes)already has a shorter rear end than the earlier 528e's.  
The 5speed '88s have the 3.25 gearing, while the automatics have the 
3.46 gearing.  This is much of the reason why an '88 528e feels 
considerably livelier than the earlier versions.  Of  course, the 325i 
head and better exhaust system also helps.

A 3.73 rear end from a 325i can be installed, which will definitely 
improve accleration, but crusing rpms and fuel economy will suffer.

Hope this helps,
Ben