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OK, OK...
This is a question that gets more different answers than I can count. My fresh forged motor, how long should I break it in? I have 400 miles on her, 20 + heat cycles, almost all below 4,000 RPMs (it might have slipped once to 4,500 :rolleyes:).
I was trying to hold out for at least 500 miles, but some say 1,000. What should I do?
PS - I do intend for this motor to last AT LEAST as long as the stocker did!!
As long as oil pressure is good, no KR, a/f ratio good, do it. But I think you said it was kind of lean, it needs to be 12.8 at wot.
I dunno I would at least say 1000. You spent alot of money and time on this. Plus its brand new. I mean if you dont blow it up, it'll be good till about 25k or so.... :smile: haha nah im just playing.
But really just wait a little longer pleaseeee. I dont wanna see anything mess up on it.
Around 75% throttle it starts to go richer, drops to the 13's. I haven't given WOT yet, just part throttle pulls. I hadn't given it that much throttle when we talked last.Quote:
Originally Posted by farmtruc
Haven't seen it go richer than that, but that could be because I haven't opened it up.
Trust me, I don't either.Quote:
Originally Posted by duckysbht
It's funny, we can buy a brand new truck and hammer it from day one without fear of it breaking but when we buy a replacement engine we have to baby it for a while to break it in. What's up with that? :confused:
I did manage to break my stocker in for 500 miles.Quote:
Originally Posted by RedHeartbeat
I guess the difference is I am second guessing myself since I assembled it. Logic should be that if it can live at 4,000 RPM, it should live at 6,000 RPM, RIGHT???
I did a burnout 2 miles from the dealership w/6 miles on mine and drive it like I stole it!120k miles later no problems,good oil pressure and still beats hemis on a weekly basis.Wish I could say the same about the tranny! LOL
Oh Yeah....mobil1 after 3500 miles and ever since
If you google "engine break in"...the first six links effectively say hammer it.
Its got to be true cause I read it on the internet. :doh::lol:
Really though, if you read the articles they make sense regarding the sealing the rings.
SC, I do not wanna see this motor f-ed up in any way, so with my modest knowledge of this stuff, please wait to about 750-1000 miles before you romp on it... I am sure that most automotive manufacturers put each and every motor that is dropped in the assembly line has about 10+ hours of run time before it is placed into the vehicle...but this is heresay, and we all know we think of that...
Yes, some say do it, some say don't...
But you have to push it a little--kinda like SC is doing to around 4K--to get the heat cycles up so that all of the motor components (e.g. rings) find their set from the intermittent heat cycles...
For that much money, I would go light for 2500mls.
See what I mean? There is no right answer!
The correct answer is the procedure that your engine builder recommends to keep your engine in warranty.
2 45 minute runs at operating temp, cool completely between runs.Quote:
Originally Posted by RedHeartbeat
Check.
and thats it so go hammer on it with a smile!!!!!
your running behind:lol:
No crap dude! your burnin daylight! Go do it!
Drop da hamma & hold on tight! :cool:
You should have stomped on it a long time ago SC, just keep an eye on that wideband.