[manimal]

Originally Posted by 69halfton

i just had an engine built (383 stroker) the man who built it has been in buissness for years, he builds many engines for the CASCAR racing series, so i would think he knows his stuff. He told me NO SYNTHETICS, also, the 20 mins at 2000 rpm is a bit out dated,
he said to just drive it, and dont baby it either. he says dont pull out of the drive and go WOT, but you can give a little push now and then.

Drive it like this for a month or so, and then change oil & filter, and your set to go to the dragstrip.

the reason that you can get away with this now, is that everything is machined to be perfect fit, with the advancment of computer technology etc.

the only thing your ACTUALLY breaking in on your motor would be the piston rings.

an old trick that many people used to do when they had new rings was..
take your truck out, and accelerate pretty good up to 50 mph, then back right out of the throttle and let it fall down to 15 mph, then repeat about 5 times.
after that feel free to hammer on your engine all you want.

I dont agree with that at all unless you are using a solid roller cam. If that were true, then why do the cam manufactures say to "break-in" the cam?
-Lance