M3 Evo power drop

[ryanm3evo]

Hi guys

I have a 100'000 mile 1998 M3 Evo

Assuming its running as it should.(not too sure yet picking it up in 5 days) What do you think the power should be?

I know its 321 standard but have no idea roughly where it will be now. Ill be gettin a diagnostic and rolling road on her within a week of picking it up

Thanks

[CRACKIE]

Hi Ryan ~ There are many who say that the EVO never makes the rated power but its usually people who 'only' have 3.0 M3s There is plenty of evidence on here, and http://www.bmwowner.com/forum/ of "properly maintained" stock EVOs and Mcoupes making 315+ Bhp.

EVO engine is rated at 321PS not 321Bhp ; there was a mistake in the UK handbook. 321PS = 316.6Bhp.

Properly maintained S50B32 engine includes having the valve clearances set correctly in addition to usual oil and Inspection services; the power drops when the clearances go out of tolerance and a 15-25 bhp power loss is common.

Clearances should be checked and adjusted at every Inspection 1 and 2 service, according to the handbook anyway and the work needs to be done on a stone cold engine. From what I understand this involves taking the car to the garage the day before the work is done and it appears there are many 'specialists' out there who neglect the work or don't have a clue how to do it correctly.

If you checkout the bmowner forum above there is a thread where several hundred rolling road results have been posted. Last week there was a guy who's totally standard EVO made 293 before and 317 after clearances done !!!

I'm going to get mine checked / adjusted in the next month or so and will have before and after info. to post. Car is a 74K mile EVO with some minor mods & remap and made 319 last time on RR.

List below might be helpful ~ IMHO they will sort clearances properly.

http://www.bmsport.com/ Bexley Heath Kent
http://cpcpe.com/ London NW10
http://www.geoffsteelracing.co.uk/ Gainsborough Linclonshire
http://www.pmwltd.co.uk/ Chelmsford Essex

Darjac Racing ( Darren Farrell ) based in Hadleigh Suffolk 07807 689538. Details to be confirmed

Some equivalent experiences from 6 cylinder M5 owners here http://www.m5board.com/vbulletin/showthread.php?t=...

Edited by CRACKIE on Tuesday 15th July 17:15

[matth76]

Hi there.
100k miles is nothing and about 20k miles below average which is good. Providing it has been well maintained and serviced regularly, and always warmed up properly for 10-15 mins before taking the revs over 3.5-4k, the power levels should be as they were from the factory. My old Golf VR6 had over 100k miles (about the same age as your car) and was making more than the factory quoted figure when it went on the rolling road. Sometimes a very low miler which has never been warmed up properly will have less power over the years compared to a car which has motorway miles.

[andye30m3]

My E36 Evo's done nearly 90,000 miles and made 316 bhp recently which i was very please with as its standard except for a drilled airbox (last owner, not me).

I would have been very pleased with anything over 300bhp

[wpo750]

If your Evo is totally standard then anything over 300bhp is a good result. Mine was remapped with an induction kit and gave a rather optimistic reading of 329, not one to complain of course.

[shamrock]

wpo750 said:

If your Evo is totally standard then anything over 300bhp is a good result. Mine was remapped with an induction kit and gave a rather optimistic reading of 329, not one to complain of course.

How much torque was it producing when it read 329?