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I don't get why so many people have this myth about if you boost a new motor its going to blow up or something..Let's put it this way, I boosted my motor to 11 psi or so, at about 150 miles. At that time, i had 195 psi of compression accross the board, dead even. Now at 30k miles later, I have about 185 psi on all 4. If the motor was machined correctly,and assembled correctly, then by all means drive the damn thing, and dont drive it like a grand ma either. You NEED to load up new rings to help them seal proplery right away. Giving it a little boost will help this process. I boosted a few psi right after i did the initial start up and drove it down my street! People need to stop freaking out about new motor breakin, and just drive them. You wont blow it up. Dont be gentle, and also dont drive it like you stole it either.
You have to realize that the most critical time for piston ring-to cylinder wall breakin, is within the first 20-30 minutes after initial startup! The *best* way to properly breakin a motor is to first start it up, and during warmup, check for any leaks,and get all the air out of the cooling system. Once this is done(about 15 minutes), immeadiately take the car out and do 10-15 pulls, going in 3rd gear(2nd for auto's), going 30-60mph pulls. Once at 60,let it slow down to 30 with engine braking(using NO brake pedal), as engine braking helps put a good load on the motor. It is within this time that the rings do MOST of the breakin on the cylinder walls. This is why it is very important to load the rings up as soon as possible after initial startup. If you just baby it around for 1500 miles, then the motor will probably not have as much compression as it could have, if the right procedures were followed. It really doesnt take long for the rings to bite into the *rough* freshly honed cylinder walls. You want to force the rings into the cylinder walls as soon as possible, and as much as possible, for best ring breakin.
A lot of people dont realize either, that rings just dont seal by their normal tension. When the piston is traveling upward compressing the A/F mixture, the compressing mixture gets BEHIND the rings, and forces them to the outside, eg the cylinder wall. When you put more load on the motor, it puts more outward force on the rings. ![](http://img61.imageshack.us/img61/7861/newsigpic2bt3.jpg) 13.5 @108 MPH-2.2 60ft(stupid FWD!) S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential fuel injection) My webpage: http://eclipsed4evr.home.comcast.net -1998 Mitsubishi Eclipse RS-T- "Toy" -1992 Plymouth Laser Turbo AWD(SOLD) -2000 Honda CR-V(daily)
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