what is the "reccomended" process for breaking in new rings, bearings????

also need to know what weight oil to use

 

Turn the key, press the gas pedal and go. Same thing GM does...Fire them up drive em up on a diagnostics thing.....pedal to the floor for a min, then when thats done...pedal to the floor and buning out all the way out the building. Use the oil thats recomended for it. I use mobil 1 0w40. Skeptics say not to use synthetic but they are idiots. If its honed right the rings will seal, and for everything else, you dont want it to wear. People have this image that the bearings need to "break in" as like lapping valves or something.

 

that all sounds great but is there not a thing called "heat cycling" the engine.....
thats the prob i have.....i havent heard the same thing twice when it relates to properly breaking in the engine

 

i have broke in many engines. I myself usually take it easy for a few hundred miles, then drive the hell outta it. it is funny everbody has thier own way of doing it. one guy i know runs them on a test stand right away,(usually a race motor) sets the timing and bam 7k he shuts it off and says well it held together put it in the car. As far as oil with the tolerences on todays engines i think you could run synthectic and have the rings seat, but i will run conventional in mine.

 

Running a race engine a few hundred miles before pounding on it may be a problem for most race cars. Unless you have an engine dyno, I don't see how you can really "break in" a race motor.

 

the engines i broke in with some easy driving were not dedicated race engines, street-strip cars.

 

My dad always ran his on an engine stand for 20 min. THen after that!! ***** to the WALL.

As for me I think I will just cruise straight to the dyno to have it checked out to make sure im safe and put about 300 miles on her. THen go back to the dyno to do some WOT runs and fully tune her.

 

thats what i need to hear guys...anything else....

i talked to a old friend of thefamily and he used to build and balance sprint car motors.....he says to set it run on a stand for about 30 min.....with standard oil....so the rings seat in....or whatever they do.....then run the designated oil i choose from there after 150-200 miles drive the car as i will the entire time i will be in it.......***** TO THE WALL........HAMMER DOWN ERNIE!!!!!!!!

 

http://www.mototuneusa.com/break_in_secrets.htm

 

I talked to my engine builder today (Carolina Racing Developement) and Bob said that they run their engines for 20 minutes at 2000 rpm's. Then drive the car for 100 miles doing light accel and decel. Change the oil and let it rip. That's the way he said they do all of their racing engines. He never said whether or not they change the oil after the 20 minutes but I will for the heck of it. He also told me that I could run synthetic oil after the 100 miles. They build a ton of motors every year so if it's good enough for them then it's good enough for me.

EDIT: I just read post 8 and it is basically the same.