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reassuring proper break-in.

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Old 10-07-2008, 12:56 AM
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Default reassuring proper break-in.

Ok guys, tell me if there is anything im missing.

specs on car;

347 forged bottom end (never been fired)
patriot stage 2 heads/ f 14 cam (232/234 598/601 112) all new
FAST 92/92
performabuilt level 2 tranny w/3600 stall (never been ran)


run dino oil (probably name brand conventional oil) in it for 300 or so miles? (or more)

go ahead and put synthetic in transmisiion(performabuilt said it didnt matter)

pull fuel pump fuse, crank and crank (build oil pressure) then let her eat?

anything im missing?
Old 10-07-2008, 05:07 PM
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when I built my moter I ran $1.50 qt castrol fired the car and burped all the air out of the coolant. Before I took it off the lift I cahanged it and the filter. Car ran for about a hour total. Put the same cheap castrol in it and drove it for about 300-400 miles drained it again changed the filter. Same oil for another 500 miles dumped it and switched back to mobil 1 full synthetic. I' kept the rpm under 3,500 rpm untill it had 10-15 heat cycles. Thats the most important part. After that its been given pure hell. Some may say its over kill but the $100 I spent on oil/filters is nothing compaired to the 7k it cost to build the moter. Also before I fired it up I just pulled the two big plugs on the coil packs to prime the engine.
Old 10-08-2008, 04:46 PM
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thanks, open to other methods ppl used as well.
Old 10-09-2008, 03:55 PM
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Do NOT baby the motor for 500 miles like people used to do. You'll be down on power.
Old 10-10-2008, 01:15 AM
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Originally Posted by KMS.1320
Do NOT baby the motor for 500 miles like people used to do. You'll be down on power.

say wha?
Old 10-10-2008, 02:21 AM
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I was always told to go easy for the first 500 miles. After that don't be afraid to get into it a little. Then again, I had friends who beat the crap out new engines. They didn't explode...
Old 10-10-2008, 10:30 AM
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Use conventional for the first few thousand miles. I started my motor up, warmed it up then changed the oil and filter. After I filled it back up I drove it over to the dyno and let her rip. No need to take it easy. I've been changing my oil about every 1500 miles and and it only burns about a half qt. between intervals
Old 10-10-2008, 11:19 AM
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This method has worker very well for many people...modern engines are machined different than the ones in the past...the metals that they are made out of has changed a lot too.

http://www.mototuneusa.com/break_in_secrets.htm
Old 10-10-2008, 01:12 PM
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I've seen people break in motors for 1k-2k miles before going over 1/2 throttle, and i've seen a friend "break in" his motor by driving it under 3k rpm for the first 50 miles then doing WOT burnouts.

Both are still running fine, so IDK which is best.
Old 10-10-2008, 04:13 PM
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Drive it like the cops are after you.....seats the rings so they won't spin and gaps line up. Change the oil at 500 and 1500 miles and your good to go. Worked well for me...
Old 10-10-2008, 04:29 PM
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drive it like you stole it!
Old 10-10-2008, 07:18 PM
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Break it in like we do at the dealerships.... pull the fuel pump fuse crank it over for a minute or so put the fuse back in....turn the key to the on position to get fuel to the injectors....wait about five seconds and fire it up. Run it at idle while it heats up and yo bleed your coolant system. Then we rod check em.......5-6 grand a couple times to make sure everything seats properly... change the oil then give her hell.
Old 10-11-2008, 02:11 PM
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Originally Posted by slt200mph
This method has worker very well for many people...modern engines are machined different than the ones in the past...the metals that they are made out of has changed a lot too.

http://www.mototuneusa.com/break_in_secrets.htm
Exactly! Good post!




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