Would you supercharge a 2008 M3 with almost 70k miles?

[kkhurr]

Just something ive been playing around with but wanted some peoples opinions.

The car is my baby but also daily driver. I double up the oil changes. services are all up to date. No major issues in the past. No track days on the car. Obviously spirited driving here and there.

Obviously I want the power but not at the cost of a major mechanical failure randomly happening.

What do you guys think?

[gazosnic]

Originally Posted by kkhurr

Just something ive been playing around with but wanted some peoples opinions.

The car is my baby but also daily driver. I double up the oil changes. services are all up to date. No major issues in the past. No track days on the car. Obviously spirited driving here and there.

Obviously I want the power but not at the cost of a major mechanical failure randomly happening.

What do you guys think?

Do some oil analysis to see if bearings are in good shape. At that mileage I would probably replace them just to be safe for sc.

[squartus]

I would go ahead and SC it, you may actually get more life out of your engine by replacing the bearings with WPC treated ones and having the mechanic look things over while hes at it. I thought my bearings were fine... until I replaced them when I SC my engine. Very very glad I did.

[bing240sx]

yeah i wouldnt worry about it if you can verify that all is well under the hood.

also... it's friggin awesome

[pbonsalb]

Yes, after preventative maintenance rod bearing change.

[CIFUM3]

I'm close to 70k and just bought a supercharger, but I plan on doing the bearings as I install the supercharger to be on the safe side haven't had any issues with the car this far. And I do drive it it like I stole it.

[Alex07M3]

Yes I would, and like others said, replace the bearings at the same time!

[mermar]

I wouldn't supercharge a M3 with any amount of miles. If I wanted that I would by a Hellcat. BMW is not perfect - but I trust the collective engineering might they have.

[mj89h]

bearings cost about 10% of what a motor replacement costs (assuming you are paying a shop to do everything).... so its cheap insurance / peace of mind IMO.

I did it with my car after it was S/C for 20k miles with 25k on the motor and the bearings came out in pretty good shape relative to even N/A motors with similar mileage

pics of the bearings can be found in this thread
http://www.m3post.com/forums/showthread.php?t=1039320

[Killerfish2012]

Originally Posted by kkhurr

Just something ive been playing around with but wanted some peoples opinions.

The car is my baby but also daily driver. I double up the oil changes. services are all up to date. No major issues in the past. No track days on the car. Obviously spirited driving here and there.

Obviously I want the power but not at the cost of a major mechanical failure randomly happening.

What do you guys think?

People on this thread have already given you great advice. Change your rod bearings when you supercharge, as supercharging seems to accelerate rod, and main bearing wear. Doing this however, does not not eliminate the underlying problems. I recommend the following if one was to supercharge:

http://www.turnermotorsport.com/p-14...p-oil-kit.aspx

http://www.achillesmotorsports.com/B...-am-dsks65.htm

[CIFUM3]

Lord have mercy^^ hahaha that's nonsense another 10k just for a piece of mind? No thanks if the engine blows after babying it with oil changes at 5k the "rod bearing" maintenance and arp bolts than its meant to blow.

[Killerfish2012]

Originally Posted by CIFUM3

Lord have mercy^^ hahaha that's nonsense another 10k just for a piece of mind? No thanks if the engine blows after babying it with oil changes at 5k the "rod bearing" maintenance and arp bolts than its meant to blow.

"rod bearing" maintenance does nothing, because supercharged engine tear downs show equal amounts of wear on the rod, and main bearing. Since you're not advocating changing your main bearings, the engine will "blow".

[squartus]

Prob be cheaper to simply mill the crank etc to proper specs and fix the problem rather than buy a 8k oil sump that may or may not help the main issue.
http://www.m3post.com/forums/showthread.php?t=892838
That link will show you what parts in the engine need to be milled etc to proper specs, as has been said its not just the rod bearing clearance but they do seem to be the first to go so replacing them will extend life of engine but... not only issue.

[gatorfast]

Originally Posted by Killerfish2012

"rod bearing" maintenance does nothing, because supercharged engine tear downs show equal amounts of wear on the rod, and main bearing. Since your not advocating changing your main bearings,the engine will "blow".

Do you have any links to pics/discussion of the main bearing wear?

[Killerfish2012]

Originally Posted by gatorfast

Do you have any links to pics/discussion of the main bearing wear?

Watch the whole thing carefully. Main bearings start to be discussed around 3:38

[WickedE93]

Originally Posted by Killerfish2012

Watch the whole thing carefully. Main bearings start to be discussed around 3:38

Great video, thanks for posting!

[Ezio]

i would feel better about S/C a motor with more miles than less miles. I would be pissed to blow a low mile motor more than high mile one. your motor already has some miles on it, probably changing the bearings would be good S/C or not!

[gatorfast]

Originally Posted by Killerfish2012

Watch the whole thing carefully. Main bearings start to be discussed around 3:38

Its a good video but I dont know if comparing the wear patterns of a stage 3 racing engine to average s65 is appropriate. Either way it basically underscores the issue that the experts on here have been saying all along...lack of lubrication.

[Killerfish2012]

Originally Posted by gatorfast

Its a good video but I dont know if comparing the wear patterns of a stage 3 racing engine to average s65 is appropriate. Either way it basically underscores the issue that the experts on here have been saying all along...lack of lubrication.

It's not stage 3, they had not developed stage 3 at that point. Drew did runway events, Paul Waker (RIP) did a few events at buttonwillow, so his comments about: "we raced this car of a 3 years straight", are exaggerated.

[Sebringjetta]

according to alot of the threads on here your motor will most likley blow up do to bearings anyways so why not.... cant take the motor with you when you die anyways... drive it and drive it hard like its supposed to be!! ultimate driving machine = JOY

[pbonsalb]

Gintani seems to have blown up more engines than other tuners. Drew left them for ESS.

Have yet to read of a failure due to main bearings. Read of plenty due to rod bearings.

I changed the rod bearings. I have no worries about the main bearings based on what I have read.

[whats77inaname]

Originally Posted by kkhurr

Would you supercharge a 2008 M3 with almost 70k miles?

After a bearing replacement, yup.