jvandyke
True Classic
okay, new thread because it's interesting.
after much distress last year with blown head gaskets I determined my timing marks on the crank are not correct, or, perhaps better stated; the crank indicates 5 degrees behind flywheel.
I was trying to time it off crank marks, 10 BTDC which was really 15ish, spark knock and blown gaskets. Recent fiddling and engine seems knock free at 5 BTDC (flywheel timed, crank shows 0).
I had set my cam according to crank so I imagine my cam is off by 5 also.
Thing is, the car has never run so well, at least in the upper registers, I was coming in today revving into the 6,000 zone and it was singing, prior to this, when running more initial advance, it never seemed very happy up there, power drop and general "thrashing" about.
I guess I'm wondering if the cam being retarded by 5 and the timing retarded down to 5ish (now) has resulted in a compromise.
I'm thinking I should go back in to set the cam according to the flywheel (trying to verify TDC as best I can without pulling the head again), then revisit ignition timing. This may explain why I didn't seem to have trouble setting the cam after shaving the head (because I wasn't really setting the cam to TDC but rather to 5 degrees BTDC).
It sure seemed really really happy running in today. I'd be happy to leave it be for a while!
after much distress last year with blown head gaskets I determined my timing marks on the crank are not correct, or, perhaps better stated; the crank indicates 5 degrees behind flywheel.
I was trying to time it off crank marks, 10 BTDC which was really 15ish, spark knock and blown gaskets. Recent fiddling and engine seems knock free at 5 BTDC (flywheel timed, crank shows 0).
I had set my cam according to crank so I imagine my cam is off by 5 also.
Thing is, the car has never run so well, at least in the upper registers, I was coming in today revving into the 6,000 zone and it was singing, prior to this, when running more initial advance, it never seemed very happy up there, power drop and general "thrashing" about.
I guess I'm wondering if the cam being retarded by 5 and the timing retarded down to 5ish (now) has resulted in a compromise.
I'm thinking I should go back in to set the cam according to the flywheel (trying to verify TDC as best I can without pulling the head again), then revisit ignition timing. This may explain why I didn't seem to have trouble setting the cam after shaving the head (because I wasn't really setting the cam to TDC but rather to 5 degrees BTDC).
It sure seemed really really happy running in today. I'd be happy to leave it be for a while!