break in query
 

What distance would be required in road miles to break in new P/Cs. I have clocked up about 100 miles on back roads - undulating twisty roads. But these are all illicit miles and I want to keep them to a minimum before hitting the track.
Thanks
Alan

Creating cylinder pressure is the important part. 3rd gear, 2500 - 5000, engine brake back down to 2500. If you can engine brake down a hill, even better.

Todd

Thats pretty much what I am doing, + a bit of boost. Up to 0.5 bar at moment.
But the Q is for how long before WOT on track?
Alan

Hey Alan, glad you got your engine back together (I followed your grams removal thread).

Regarding your question - you will get as many different answers as there are people that build engines. :)

The system that I use, learned from a pro-engine builder that I know and trust, is three heat cycles at a stand still (throttle blipping and so forth . . . checking for leaks and other problems while doing so), followed by a lowish RPM pass though the gears (stop and check for leaks and problems), and then hammer and tongs from that point on. This is easiest to accomplish on a dyno, but can be done street or track, too.

So in other words, I would have been ripping on the track in your car already. :)

Thats what I want to hear. I'm not sure prolonged running in has much benefit.
I've had two runs now - about 50 ml each, pushing it a bit more each time, and then checking over for leaks, loose bolts etc. NO leaks. Not a drop. And it sounds and feels awesome. Can't wait to get it on track. I was thinking one more stealth run and perhaps 0.7bar and a few more revs -4-5000. Then drop the oil and head for track.
Hopefully a couple of experienced builders may chip in. Track car bit more difficult than road car because easy to run road car in on road. Just avoid babying it.
Regards
Alan