7 replies to this topic

[GreaseMonkey]

Hi,

With the Vernier timing gear, does adjusting it clockwise (towards the manifold end) increase the timing figure and anticlockwise (towards the front dizzy end of the engine) retard the timing figure?, is it just a gentle tap to get the timing figure moved a little?

Thanks

Edited by GreaseMonkey, 30 April 2010 - 03:04 PM.

[mini-geek]

clockwise reduces it, I think....... I found trial and error the best way.

[GreaseMonkey]

Thanks

Can anyone else confirm?

[Ethel]

I find it easier to think of it by moving the crank with the rest staying still, then you can just use the ignition timing marks as a guide.

turn the crank anticlockwise relative to the cam (or thecam clockwise from the crank) to advance the timing i.e. 106btdc would become 107 or more.

Thanks

Can anyone else confirm?

[Pauly]

I'd go with clockwise to advance aswell.

Edit: Changed direction.

Edited by Pauly, 02 May 2010 - 07:41 PM.

[bmcecosse]

Moving the cam round clockwise will ADVANCE the cam timing relative to the crankshaft position! It's all a waste of time - you don't KNOW what will be the best setting for YOUR engine. And are you going to allow anything for chain stretch ? Just set it dot to dot! For anything but a full race engine - that will be fine.

[Pauly]

Moving the cam round clockwise will ADVANCE the cam timing relative to the crankshaft position! It's all a waste of time - you don't KNOW what will be the best setting for YOUR engine. And are you going to allow anything for chain stretch ? Just set it dot to dot! For anything but a full race engine - that will be fine.

Your right about which way to go now thinking about, but totally and utterly wrong about the vernier timing, might aswell not buy a performance cam if your just going to set it dot to dot! Ive heard of upto 5 degrees tollerence with dot to dot!

Edited by Pauly, 02 May 2010 - 07:42 PM.

[bmcecosse]

Nah - if it's a decent cam - it will be fine! And who knows - 5 degrees retarded (or advanced) may actually be the BEST setting for an engine. There is no way of knowing the ideal setting for any particular engine - unless able and willing to do multiple dyno tests. The manufacturer of the cam should grind it so it is correct at dot to dot. That's what the dots are for! Ideally - it should give equal lift at overlap on TDC - but even that, although theoretically 'correct' may not give the best running in a particular engine!