Is it possible to have a 'purrrrfect' idle in the M30 engine??

[88m53453]

So, as they are 'non-adjustable' in regards to timing, is there anything you can do whilst playing with the timing light to help the situation, or is it just observational fun while drinking a beer?

Just a fun thing while enjoying, not sure if the aftermarket chips control it any better

[Dash01]

How airtight and secure is the fat vacuum hose that goes to the brake booster, as well as the brake booster itself?

[88m53453]

How airtight and secure is the fat vacuum hose that goes to the brake booster, as well as the brake booster itself?

this car has a hydraulic booster, so no vacuum hoses. Uses the power steering pump to give the boost to the brakes. GM used it way back...

[Flash635]

So, as they are 'non-adjustable' in regards to timing, is there anything you can do whilst playing with the timing light to help the situation, or is it just observational fun while drinking a beer?

The timing isn't adjustable - easily, but if you need to adjust it because of a modification it can be done.

The timing should be steady, if it's not then there is a fixable, mechanical reason why.
The first thing I'd check is the so called bullet proof (on the M30) cam chain and the tensioner and guides.

But I've never seen a dead smooth M30. I had an E28 with an L Jet that was pretty good but not as good as the 4.0 litre Ford straight 6 we have in Australian Falcons. And not even as smooth as the 4.0 V6 I have in my Explorer .

The valve timing on these things is pretty herby isn't it? Nothing until about 2800 then balls to the wall all the way to about 6000.