ive got a 92 325is with 138,xxx miles on it. i am plannin on turbocharching it but i was wondering if the motor would still be strong enough to handle boost with the proper supporting mods (ie. injectors, hg, arp studs, etc). i have seen alot of guys make good power with stock internals with these motors but i dont think ive ever noticed what the millage was on their cars
what do you guys think??

Boosted mine @ 195,000 KM's and its still strong & reliable.

thats good to hear. what kind of setup are you running and did u do any precationary maintanence?

it will be fine

thats good to hear. what kind of setup are you running and did u do any precationary maintanence?

Downing atlanta Supercharging kit (mostly).
Keep my car tip top always to begine with so no issues needed to be delt with.
I would suggest all fluid changes (- the washer bottle) breaks and a suspension upgrade first so you do not crash your ride before you get to use it's new potential in full.

ive got a 92 325is with 138,xxx miles on it. i am plannin on turbocharching it but i was wondering if the motor would still be strong enough to handle boost with the proper supporting mods (ie. injectors, hg, arp studs, etc). i have seen alot of guys make good power with stock internals with these motors but i dont think ive ever noticed what the millage was on their cars
what do you guys think??

It should be fine, however you should do a compression test, at that mileage, depending on how it has been maintained, the rings may not be sealing optimally; specifically if it has not been run hard enough to burn out carbon gunk.

+1 compression test. :thumbup:

check the motor over well first. if its healthy then boost is not a problem. the turbo went on my 525 at 230k miles, and on my 325 at a whole bunch as well.

what are some good compression numbers to look for?? iver heard aroun 190 area is pretty strong??

You're not really looking at numbers as much as you are consistency. As long as all cylinders are within 10% PSI of each other you should be good.

well 10% of 190 is 19psi... isnt that a bit much to differ from cylinder to cylinder?

You're not really looking at numbers as much as you are consistency. As long as all cylinders are within 10% PSI of each other you should be good.

Actually it is 5% per Bentley's manual.

Well that equals out to about 10% in Tennessee terms :) Redneck engineering FTW!