i'm about to finish building my motor and was wondering what was the best way to break it in...it has 11.5:1 pistons, and a pro series jg head with crower 402's, and all the other misc stuff, so my motor is pretty much built...i've heard that running the car hard right when it's finished is a good way to break in the piston rings so they expand fully...but some people say it's better to baby the car and not take it above 3500rpm for about 1500 miles...so let me know what you guys think.

 

gotta take ur chances with the info u already know. some wanna beat it some wanna take it easy.

i wanted to beat the rings but take the rev's easy. so i was doing alot of 80% throttle pulls to 3500 then 4500 and letting it coast down in gear to get the rings to seal well to the bore. but mine didnt break in right lol so i get to try to break it in again maybe in 10-12k when i get tired of burning oil

 

Earl had a great thread about motor break in not too long ago

https://honda-tech.com/zerothread?id=878397

 

earl is definately right. plan on towing your car to the dyno car dollys are pretty cheap, 60 bucks a day? 40 bucks for a few hours? only have to tow the car to the dyno, assuming all goes well.. drive it home!!

 

i suggest drive ur car pretty hard

heres why
http://mototuneusa.com/break_in_secrets.htm

 

good replies...any more info would good too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jockdeeznutz &raquo;</TD></TR><TR><TD CLASS="quote">i suggest drive ur car pretty hard

heres why
http://mototuneusa.com/break_in_secrets.htm</TD></TR></TABLE>
This is the way I prefer! Make sure it's tuned however or beware the recourse.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicsitek GanGsTa &raquo;</TD></TR><TR><TD CLASS="quote">
This is the way I prefer! Make sure it's tuned however or beware the recourse.</TD></TR></TABLE>

I just broke my motor in, and I don't burn a drop of oil.

Here's what I did.

Initial startup, let warm up. Idle at 1500 RPM for 15 minutes or so.

I didn't take my car pas 4000 or so RPM for the first couple hundred miles. I would also do my best to vary the RPM.

I would do a lot of 80% throttle driving to 4000 RPM or so, and coast back down. Another hundred miles or so later, I'd take it to 5000 and do the same thing, and so on.

This worked for me. Lots of different ways to do this, though.

 

good luck

 

here is what I am going to do.

http://importbuilders.com/breakin.html

 

If your running new cams/rocker arms or your new cams on your old rocker arms start the car up and bring the revs up to 2500-3000 rpm's for a 20 minute period for the cam break in you can do this by adjusting the throttle cable or use your standalone if you have one as for seating the rings. Only take the revs to 3500 for the first 200 miles then after that you can increase the rpm's by 500 for every additional 200 miles all the way to a 1000 miles and that should do it go here and you can read for yourself

http://www.theoldone.com
you'll have to join the forum if you haven't already

 

wow that is a interesting write up. I think though it depends on who you ask. Look at the writeup Jeff did on IR. I have a fully built gsr running 12.5:1 cr built by Larry at Endyn and he begs to differ on how you should brake the motor in. Just a little more info for you guys to dwell on