Looking for new car

I cueently own a 95 E34, looking to purchase an 03 525 or 530 (sport) I like the added power of the 530, but came accross a clean 525. Any suggestions on how to chip-up the 525, and what HP that will net me?
Thx.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Wattage wrote:

Not much. The newer BMWs tune themselves rather effectively to match the octane of the fuel being used. The old "chip" the car worked by advancing the timing which on non-adaptive cars was set conservatively by the manufacturer.
And you can't "chip" them - the ECU has to be re-programmed now, there are no replaceable chips in it.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Thx, I guess that makes my decision easy (or harder maybe)
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.