Vacuum Advance
Posted
#1003459
(In Topic #119046)
Old Timer
Vacuum Advance
Does anyone know why my vacuum advance has 2 vacuum pipes?
One goes to the carb and one to the manifold is this better or worse than the standard one?
One goes to the carb and one to the manifold is this better or worse than the standard one?
~Madferret
Mk1 1457cc 5door GX '83
Mk1 1457cc 5door GX '83
Posted
Settled In
One is to provide advance, the other is to retard the timing during different throttle conditions.
Not a case of being "worse" as it does the job intended- to keep the timing as optimal as it can be, considering that its all purely mechanically done.
If its all working ok, then let it alone, you cant fix it if its not broken.
Not a case of being "worse" as it does the job intended- to keep the timing as optimal as it can be, considering that its all purely mechanically done.
If its all working ok, then let it alone, you cant fix it if its not broken.
Posted
Old Timer
Overboost said
One is to provide advance, the other is to retard the timing during different throttle conditions.
Not a case of being "worse" as it does the job intended- to keep the timing as optimal as it can be, considering that its all purely mechanically done.
If its all working ok, then let it alone, you cant fix it if its not broken.
Ok just wondering if it was a valid mod or just someones left over junk, thanks
~Madferret
Mk1 1457cc 5door GX '83
Mk1 1457cc 5door GX '83
Posted
Newbie
does any body know how much advance is needed whilst sorting out igniton timing mine is runing with 20 degrees of advance my son is training to be a mechanic and hass told me that there is 20 degrees advance on tick over but when under load it turns to top dead centre is this right ?
Posted
Old Timer
So far as I understand it it should only advance once the accelerator is pressed and more vacuum is created, at idle there should be no vacuum and so no advance.
~Madferret
Mk1 1457cc 5door GX '83
Mk1 1457cc 5door GX '83
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