The hard break-in.

[Cokewell]

I wouldn't tell you how to think but I would like you all to check out the power news articles at Mototuneusa.com (http://www.mototuneusa.com). Especially the hard break in article. After you read some of these come back and post some feedback.

[M52 POWER!]

AHA that's teh site you were telling me about!

[DeadSailor]

intresting intresting....to bad im like xxx,xxx miles too late

i have heard ppl say its better to break it hard....but it just sounded like they were talking out of their a$$es though, this guy makes a good argument though

[silver-e34]

it makes sense i did that once on a 4banger motor i rebuilt but not intentionally i took it on the hiway and ran it hard but it got hot everytime i opened it up than the last time i did the needle was at the 3/4 mark so it wasnt really that hot than when i go to stop to pay a toll it cut off on me it seased i let it cool off and it started back up and i drove off and broke it in normally after that but that motor did run strong for a long time after that with no problems :dunno: never tried it again with any other motors tho

[Roy]

I've heard all sorts of different break-in procedures..
A good mechanic, guy has rebuilt vettes for a living. Has two split window corvettes, sweet stuff, and $$$..
He says only break it in for 500 miles, then its fine.

I've also heard as soon as you get it just run the engine hard for 500 miles. It'll produce more power over the band than a regularly broken in engine, but will last 50,000 miles less than a 'properly' broken-in engine..

:dunno:

[JonnyChimpO]

hmmmm.... i had 500 miles of babied driving, after that shes had a hard life.

[LDadrenaline]

I think my first autoX with the car was when it still had under 1k miles rofl

[silver-e34]

hmmm after thinking about it his reasoning for this is that the rings get more pressure but actually @3000RPM OR 6000RPM they still see the same compression so they should still seal the same the pistons see more speed but the rings still see the same pressure per cycle so im thinking its :bs: but if the pics he has posted are what he says they are and not modified than it does work :dunno: time for some tests :D

[kelso]

ive heard a lot of conflicting stuff, but i trust the hard break in method more. if i ever buy something new, ill break it in hard. my only problem would be like the clutch. i know the clutch need an easy break in.

[DeadSailor]

^^^^
i was actually wondering about stuff like that. besides the clutch i think u have to break in the transmission and diff? no? imight justbe talking out my a$$, just what i heard. i dont know nothing about no tech stuff

[kelso]

yea im not incredibly technical but i know enough and i know with a new clutch you shouldnt rev high at all and you should be very easy with it. drive like a granny basically. but i think id still run it hard to get the motor broke in and if the clutch goes, maybe it will be under warranty! or just upgrade it anyways

[TheDarkSide]

I am pro-clutch-breaker-inner! Anyone need my help? :roll:

[M5Beast]

The owners manual for my M5 has break in miles listed for alot of parts. transmission, brakes, engine, etc....

Most are about 350-500 miles, but it also says to stay under 5,500 rpm and not to full throttle until 1,200mi, and not to exceed 106 mph. Also you can't go above S4 on shift speed, (it goes up to S6), and it says not to turn traction control off or run the engine in P500 Sport mode. After that it says 3,500mi break in not to go over 135 or full throttle for very long. Although I think hardly anyone has paid attention after the 1,200. I don't intend to...

I didn't even do well on BMW's standards on 1,200mi break in... I full throttled a couple times, and I hit 7,000 rpm twice, and 6,000 5-10 times. Its been run hard and has gone 108 twice.

I think the hard break in works, but only if you do it very precise and carefully. For the average person its generally not something you have the openness to do. I think its mostly just for race engine which aren't in it for long life, just performance.

[LDadrenaline]

I think it's to cover their asses so if some parts break they can go "Did you follow the correct break-in procedure??"

[M5Beast]

For the most part thats right, because they can hookup my car to a computer and see just how fast I drove it, and just how I pushed the RPMs.

[SlickShift]

For my car it said to be easy with the clutch for ~300 miles. Then to keep it under 4500RPM and under 100mph. I drove it "nicely" for about 500 miles and then got progressively harder on it.

It sounds like a b*tch to break the M5 in!

[The Weiner]

you gotta break in girls pretty hard too

[JuCo]

you gotta break in girls pretty hard too

hahahaha.......:cheers:

[TheDarkSide]

Sean -> :ballparty: