i am current building my b16 i got my block bored and sleeved, 84mm wiseco pistons, eagle h beam rods, skunk2 pro1 cams, rc 1000cc injectors,....etc but the question i really need to know is how should i break in the fresh build?? i heard that you should run 30w oil non detergent or non synthetic then drive it but not highway miles and NO BOOST and dont go over 4000 rpm's then after 100 miles change coolant? idk why that would be need but thats why i am on here asking.. then after 250-300 miles change oil and filter then once again after 1000-1500 miles then once you break it in take it to get tuned....Then i have heard take it straight from getting built and get it tuned which sounds safe in a way but kinda not it sounds safe because you could have the tuner there keeping an eye on your air/fuel etc... but jumpin right on the dyno after a frsh build??? that doesnt sound too safe so if someone could please help me out here im trying to learn how to break in the build cause this is my first one! if you need to know anything else let me know. THANK YOU

 

Do you have a wideband gauge?
If not, I wouldn't even start the engine.

 

yes just installed it before i did the build. its a bosch sensor but i cold start it up and read the air/fuel and make sure its correct then let it idle till fan kicks on or...??? im hearing so many ways to break it in

 

I'm not an expert on this anyways, but break-in is a lot of preference. I think piston ring technology has improved quite a bit so some of the old-school methods seem to be a bit more cautious. Some people just say get your wideband, tune it, then beat on it. Towing it to your tuner is probably the easiest way and let him do it. Make sure you use non-synthetic oil and it's highly recommended to use a magnetic oil pan drain plug.

So yeah, now I'm just rambling. Everyone prefers something different. You'll just have to do enough research until you decide what you prefer.

 

i break motors in on the dyno WHILE tuning them. on the dyno, it doesn't take but 20-30 minutes til you can really see the rings starting to seat. And in that period, you can dial in the motor fuel and ignition wise for optimum break-in performance.

I use "sensible beating" while on the dyno. I dont just beat the **** out of it. I work my way up the RPM's slowly. Giving the engine a few long cool down periods along the way.

Once i feel the engine is ready for it. I lay my foot down and start tuning boost to whatever realistic goal the customer wanted.

afterwards you can drive it normal for the next 1000 miles.

also, i typically have the oil changed a couple times before the tires start to roll. Get it started for the first time, run it long enough for the fans to come on, top off your coolant, then change your oil and filter.