Thread: Start up and break in

Ok so my build is 99% done tomorrow we will be installing and iring it up My question is
Do i have to do a relearn or any thing special
I know how to prime it
And not to let it idle for like the first 30 min
I will also have a tech 2 hooked up more then likely keeping it from idleing

Any info would be great

you would only need a re-learn if the crank position changed in the time after the pcm was removed. You could do one anyway. Or if you changed the pcm

I know some people have a rule with new engines where they only go upto certain RPMs for so many miles at a time to help break in the new engine.

For example......

2000k RPMs for a couple hundred miles, then say 3000k RPMs for a couple hundred so on and so forth. The basic principle is you wanna take it slow in the beginning, you dont wanna go right out to the track and burn the tar out of it and potentially ruining your investment.

Obviously you are gonna rev higher RPMs at certain times, ie getting on the highway from a merge lane, or speeding around the old hag in the speed lane who is only going 45mph But you wanna baby it for a good little while.

Yes you need a crank learn. And there isn't any special break in needed other than oiling up before you let it fire. Since you have that coverd. It's all good.

Don't forget to tell P0300 to not report.

are you people serious? take the car out and beat on it after getting it running and driving down the road a couple times. if the car is broken in gently it wont like abuse. you have to break it in like you want to drive it. if youre going to be a grandma then go ahead and ***** foot it around for a couple thousand miles.

its not going to break if you put everything together correctly and have a decent tune on it.

beat on it. make sure it runs and everything checks out. make sure it shifts smoothly. make sure it comes up to temp and stays there. then flog the crap out of it and see what your cam setup you can do.

I agree with Bio, same way all my race motors are broken in.

Well i was told that the rings needed to be seated and that was the reason for part of the breakin and also that the bearings needed to harden and so on

At any rate it will have to wait till monday got to school just to see a note on the door saying out till monday no school Sucks a$$ i could have slept in

Originally Posted by wickedintent79

Well i was told that the rings needed to be seated and that was the reason for part of the breakin and also that the bearings needed to harden and so on

At any rate it will have to wait till monday got to school just to see a note on the door saying out till monday no school Sucks a$$ i could have slept in

On old flat tappet cams, you need to hold the idle above 2k or so for the first 20-30 minutes. This also helps set the rings. With newer roller cams, the cam/lifter break in is not needed, but the rings will set themselves in the first hundred miles or so if you drive it easy. If you want to help it along, after you fire it up, oscillate the throttle a little bit back and forth for a minute or two. But overall, setting the rings is not really anything to be too worried about. Just drive it easy for a little bit.

vengence racing built an LSX motor 427 for a corvette BMF Motorsports the motor was built, took to the drag strip and broke in there on a 9 sec pass out of the box.

he has since then ran 5.50's on spray in the 1/8th.

i agree, you dont really need to baby it to break it in.

good to know