How do you break in your new engines?

pferd

pferd

Club Member
Do you use the slow, low RPM method....the fast, high-rev method....or follow manufacturer's recommendations to the letter?

Just looking for some opinions, which I'm sure there'll be plenty of. :badass:
 
What he said....unless it's a flat tappet lifter, then i follow the cam break in to th T. I start mine, set the timing, let it get to temp with a few varying RPMs make sure nothing leaking shut down. WHile cleaning up i watch to make sure all is good with leaks and such. Get in car fire up go for cruise, if all is well in the first few miles, i let it rip. Nothing crazy like top RPM but a few short pulls. Change oil and go about my daily life for the next 500 miles then change oil again. If race only, i do the above but no 500 miles. I take it to the track and let it eat.
 
I broke both my sbf's in at Milan! lol
pferd said:
Do you use the slow, low RPM method....the fast, high-rev method....or follow manufacturer's recommendations to the letter?

Just looking for some opinions, which I'm sure there'll be plenty of. :badass:
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I beat that shit like a rented mule. After heat cycling and re-torquing the heads and tuning, I change the oil and then go to the track.
 
Billydroveit said:
What he said....unless it's a flat tappet lifter, then i follow the cam break in to th T. I start mine, set the timing, let it get to temp with a few varying RPMs make sure nothing leaking shut down. WHile cleaning up i watch to make sure all is good with leaks and such. Get in car fire up go for cruise, if all is well in the first few miles, i let it rip. Nothing crazy like top RPM but a few short pulls. Change oil and go about my daily life for the next 500 miles then change oil again. If race only, i do the above but no 500 miles. I take it to the track and let it eat.
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I've always taken it easy for a couple hundred miles or so on a new motor. Not sure if it really makes a difference or not but I haven't had any problems yet. I know many people who start raging on theirs right away though. I just feel better putting some easy time on my setups and a couple oil changes before I start hammering it. I guess its just personal preference.
 
If you baby it the rings will not seat. The motor needs to be loaded fairly hard and pretty often in it's first few miles of life. When we fire them on our engine dyno we bring the rpm up 2500-3000 only for about 5 minutes then let it idle a minute or two....... Then we start making short full throttle pulls while we get the tune closer. Usually about 3-4 of them and we are making full pulls after that. We do not break cams/lifters in unless it is flat tappet. You can simulate what we do on the stand, but in your car. Have fun!
 
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