well today I decided to go for a little drive, the engine started with the usual couple of cranks and the piper exhaust was still rather quiet. Cold tickover is about 1000 rpm, so I had a slowish drive until the temp gauge was reading 80C and the oil gauge a steady 75 psi.
Once I had passed 100 miles (since the rebuild) I went to the next phase of 'running in', so half throttle up to 5000 rpm.
It seemed to be quite slow and after a few miles I wondered whether it had any extra power, it seemed slower than before and wondered why I bother spending thousands tuning my vx220
So what the hell, I dropped a gear and gave it 6500 rpm......
Hmmm, ok, thats why I spend thousands on tuning, I think the speedo must be connected to the rev counter the way it shot up
Certainly the power band has changed, as soon as 5500rpm is passed the cams really 'kick in', should be good once the rev limiter is 7800rpm showo..
Not sure what it sounds like now, nothing like a vx220, the induction roar is now fighting to be heard above the exhaust
The oil pressure was surprising, at 6500 rpm it was 125 psi but at least it did drop back to 75 psi whenever the revs dropped.
Once back home the piper was louder than the previous milltek, not sure whether it will quieten down when cold or it's just settled. The exhaust gases give a healthy pounding to your hand, so no restrictions in this exhaust