Quote:
Originally Posted by mreid
What oil and weight are you running? 20 psi is really not bad at idle. The rule of thumb is 10 psi/1000 rpm. I'd run it until it really is tired.
If you are running the original pistons after a rebuild, then you must have oversized rings unless the cylinders were not bored which would be highly unusual. At the next rebuild you will have to go with new pistons, but the 289 doesn't like to be bored much over .040. Worst case you would need a new crank, rods and pistons. |
I agree. There is nothing wrong with 20psi at idle.
Some time ago, a local motoring magazine here in Aus. drove a 2 litre Alfa from Sydney to Perth 4000km/2500miles in less than 30 hours. A plug in the crank came out and they had 15 psi at 170km/h (105mph?). They drove at that speed with that
oil press. most of the trip. OK not recommended, but just shows that 20psi at idle is OK. Incidentally I have a similar Alfa; same thing happened. 15 psi at speed, zero on the gauge at idle. I didn't drive it cross-continent though, but it had to be driven for a while before I could pull the sump off and do the repair
Cheers,
Glen