yo, i was just wondering, what is the break in period for a new motor. I've heard so many different things, like for example; 1k cuz that is what new cars take. 3k at low rpm etc. i was wondering what everyone's input is on break-in period. i will have a brand new motor, new bottom end, slightly modified top end and will be boosting. thanks.

 

prime the engine, start the car, set the idle a/f, idle for 5-10 mins and check for leaks. shut off and change oil. restart car and let it come up to temp again and go to the dyno to tune.

 

yo, dbiker207 is right.

i turned mine on and ran it till the fan cycled at like 2500 rpms. turn off, change oil and let it cool all the way so i didnt burn myself. turned back on and ready to go.


use a non detergent non synthetic oil the first time. 30 weight ususally works well

 

okay, is it the same for brand new parts. like am i supposed to beat the **** outta it lol, obviously not, or so i don't think. how many miles should i have on it before i run it hard?

 

yeah all my parts were brand new when i installed them.


if your tune is good then you can give it throttle after the initial start up. make sure that when you take your foot off the gas, you let the engine slow you down dont jusst clutch in and hit the brakes. that vacuum helps seal the rings. (my car pulls between 24 and 25 vacuum at idle and about 28 at decel right now )you dont have to go redlining the **** out of it, but id give it some good throttle and slowly step up the revs you take it to over the first few hundred miles. its all about heat cycles, let the rings heat up nicely then let them cool.

 

its all about personal preference. Some engine builders say to break it in on the dyno, while others say you should go and drive it nice and easy for 3k or whatever else they prefer.

I suggest you talk to your engine builder.
Either way works fine, obviously, as I've heard of people doing both ways and their engine doesnt go and blow.