E34 525 M50 Performance Chip ?

Hi Miles,

I bought mine from a german motorsport company that trade on ebay. A german friend of mine phoned them up and asked a list of questions that i gave him and they answered all the questions to my satisfaction. I then went ahead and purchased the chip in question and when i had the head gasket done a couple of weeks ago i fitted the chip when i got it back and it has been noticably quicker. The estimation is that you get about 15-20hp more at 4000 rpm but i bought it more for the other benefits. More power lower down the rev range more smoother delivery of power through the rev range and delimited top end speed (called V-Max in germany). Overall i have been pleased with it over the last couple of weeks and the mpg that i first thought was better is now about the same as before (i presume its bedded the new timings in).

At the end of the day its your decision on whether or not you want to blind buy a chip off ebay but most of the ones for the 525i seem to be pretty capable if you ask me. Just match up your ECU number to the right one and you shouldnt go too far wrong.

Russ

Try this US based E34 forum and do a search for "EAT chip".  Many owners there have this chip and are very pleased with it, the guy who programs the chips is a regular poster and speaks english so you might get a lot more info about them.  The exchange rate for US dollars is also very good so the chip might actually be cheap as chips.

http://www.bimmer.info/forum/forumdisplay.php?f=10

I spoke to the bloke off the bimmer.info forums and last i heard he was doing tests for european/UK chips but heard nothing more than that. I even offered to do some testing for him but as i say i heard nothing back. If you get any joy from him miles let us know because i would be interested in seeing what the differences are.

I phoned and spoke to dinan a while back as well to get an idea of their chips and they only provide US spec car chips for the engine and gearbox and would not be prepared to program one for euro/UK spec cars.

Russ

Ive just bought a chip off ebay for my e34 535i sport. Apparently its a hartge chip and i paid £50. Dont know what it will be like but its gotta be worth a go! http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=32094&item=7901331158&rd=1 

Click on this link and drop the bloke an email. I know this chip is for the m20 engine but i emailed him and he had a chip for my 535i sport so he might have what you are looking for. Let me know how you get on ?