It lives 3100 Carbed video

[trotterlg]

Got it recorded today, starting to sound good, and it idles (sort of)

http://youtu.be/ES4mJdirHP0

[Purple pit]

I guess you plan to break in the cam later?

[trotterlg]

I guess you plan to break in the cam later?

First time I started it a few days ago I ran it right up to about 2500 rpm and held it there with cooling water flowing for 25 minutes, kind of ticked off the neighbors I think, but I hope that took care of the cam. I have about an hour and half worth of time on it now. It does have cam breakin grease, high zinc oil and a can of cam breakin additive in it. Larry

[trotterlg]

Also, if you are putting in a new cam (flat tappet) make sure your lifters have the oiling mod on them. There is a little flat cut on the side of the lifter body that lets pressureized oil squirt directly on the cam lobes as the lifter rotates so they do not have to rely only on splash oil. Some really high end lifters have tiny little holes in the lifter face to do the same thing. Larry

[Purple pit]

Well 25mins and 2,500rpm is better than nothing. When I did mine it was like 2k for 15min and then 3.5k for 15min. Something like that I don't remember. My paper work said to vary the rpm up to those points.
I had mine in the car with shorty headers( v8 SBC) and yes the cops did show up and it was in the day time.
The cops said that the call came from up the street. I asked where because there were three classic cars and one classic truck up there and none of them would call. They all knew what I was doing anyway, he said nothing.

[trotterlg]

I think cam breakin is sort of a black art, seems mostly important to pre-oil, put additive in non synthetic oil, start it up quickly and run it for a while at about 2500 before you shut it down the first time. In a half hour the cam makes about 25,000 turns, so I think that should give it a good polishing or kill it off one way or the other. Larry

[Purple pit]

Sure would like to hear how top builders do it. Sure seems like they keep it to themselves and then laugh at the rest of us when we talk about it.

[trotterlg]

Could be just an urban mith, something to sell cam lube. Wonder how Detroit did it with the millinon of flat tappet engines they produced in the last 100 years?

[Purple pit]

All I know is that they do a break in, there is no way around that.

[trotterlg]

Guess if I don't tear up a lobe that I did it right. Larry

[Purple pit]

It's now the nasty old wait and see. I think you have about a 70% chance of having no problems. It may come back to bite you when the mileage gets high. Or you could be just fine.

[TurboGTU]

Builders use stock or weak springs during breakin period with high zink or ptfe oil on mild or wild flat tappet cams. Then swap the recommended springs and go up the rpm range. Like previously said the can doesn't get the aligned oil from the crank. Keeping one rpm for a while will do but doesnt mater.

[Purple pit]

Learned something there!

[trotterlg]

The lifters I used have a very small flat ground on the side from the oil groove down to the face to put pressure oil to the lobe as the lifter rotates. I have heard that this was done because earlie versions of this engine had problems with cam oiling, so the mod was done to the lifters. Don't know if this is true however. Larry

[TurboGTU]

My 2.8l from the Beretta and comp cams lifters had those holes also. Nice mice motor. Is it a single chamber intake?