Done all the necessary oil changes and the engine freed up as I drove it!

 

Have now got to a 1000 miles and took it above 3000 rpm, it is very strange because it feels like the engine is still breaking in above 3000 rpm!

 

Its like every time I go out in the car it has another 15bhp added where it has freed up from the rebuild!!

 

Anyway a honda civic type R decided he wanted some at a roundabout the other night, not only did the car outcorner him, it absolutely left him for dust, and it isn't even fully broken in yet :D :D :D

When I picked up the block I was told to change the oil every 500 miles for 2000 miles and then it should be run in, but dont red line it untill 3000 miles.

 

What oil are you using Mark?

You should use mineral oil when running in, because synthetic is "too good".

 

Stuart

I used the cheapest oil I could find, apparently millers make a specific oil for running in!

 

I was told a variety of miles for the completion of the running in process, 500, 1000, 2000, to be truthful I didn't even redline it when I thrashed the type R only went to 6000rpm!! Also I am only runnning safety boost!

I was actually told 2000 miles by the people who bored the block and I trust them mostly. I think after 2000 miles I will give it some but not fully untill 3000 miles.

 

Could do what Warren did and go racing round the Nurmberg (Spelling) ring straight after a rebuild ;)

The thing is with running in, I think it is dependant upon the engine and driving conditions!

 

I was told 500 miles by a race car mechanic, 1000 miles by most of the world and 2000 by a minority!

 

With most of the opinions on here I try to gain an overview and pick what I believe to be the most logical, or the most balanced!

I was told to keep the engine below 3000rpm for 1000 miles, then every 100 miles after that you raise the RPM by 500 until you are redlining.

and sorry to burst your bubble, but you shouldn't be able to leave a type R civic behind so easily. My mate has one and it isn't too shabby at all. You can beat one in a zed, no problem, but I would have thought it would have been close on safety boost and a 6000 rev limit. Probably a crap driver!

and sorry to burst your bubble, but you shouldn't be able to leave a type R civic behind so easily. My mate has one and it isn't too shabby at all. You can beat one in a zed, no problem, but I would have thought it would have been close on safety boost and a 6000 rev limit. Probably a crap driver!

 

 

:D :D

hows the smoking now mark??

 

BTW, you can safely use most of the rev range even when running in. it more the load on the engine that causes problems. full load at low revs is faaaaaaaar worse than no load at high revs!!

Cheers paul,

 

The smoking cleared up virtually after I spoke to you, it must have been the rings not being bedded in properly as you suggested.

 

I have heard things about load before, what is the reasoning behind this?

You actually do need to create some highish load when running in. The reasons are as follows:

 

The bores are honed which gives an abrasive surface for the piston rings to wear against so they fit snugly. The honing doesn't last forever - only really during the run in process. Due to the way piston rings are fitted, the higher the load, the harder they press against the bore walls. You have a limited time frame in which to get the rings fully matched to the bore shape. If you take it too easy on the run in, you will ALWAYS have lower compression and a higher blow by....

 

Take a look at http://www.mototuneusa.com/break_in_secrets.htm

 

Comments? :D:D:D

You actually do need to create some highish load when running in. The reasons are as follows:

 

The bores are honed which gives an abrasive surface for the piston rings to wear against so they fit snugly. The honing doesn't last forever - only really during the run in process. Due to the way piston rings are fitted, the higher the load, the harder they press against the bore walls. You have a limited time frame in which to get the rings fully matched to the bore shape. If you take it too easy on the run in, you will ALWAYS have lower compression and a higher blow by....

 

Take a look at http://www.mototuneusa.com/break_in_secrets.htm

 

Comments? :D:D:D

 

 

Yup. The metal surfaces work harden over time, so you have to make sure the clearances have worn in correctly before this happens. It doesn't mean thrape the hell out of it though ! LOL