4 replies to this topic

[Dusky]

Hey, a little question : 

you can buy dizzy's online without a vacuum advance (they usually blank the hole where the vacuum pump sits) 

can you fit a vacuum pump to it? Is it as easy as just putting your old one on it? Or is it more complex?

grtz!

[Dr s]

Little more complex.. Typically a dizzy has a set mechanical advance curve and a vacuum curve.

You can buy one that has a given curve and add a vacuum but that might not be what you engine needs.

Perhaps another question about what you set up needs?

[Dr s]

Little more complex.. Typically a dizzy has a set mechanical advance curve and a vacuum curve.

You can buy one that has a given curve and add a vacuum but that might not be what you engine needs.

Perhaps another question about what you set up needs?

[KernowCooper]

Distributors that are available online without Vacuum Advance Units are not really suitable for any car thats driven on the road, the reasons for this are that while on a light throttle thee mixture will be leaner than under power and a weak mixture needs more advance, The effects of a road car without Vacuum Advance will be a loss of MPG and a reduction of torque and driveability. If you have a distributor without one, give the Distributor Doctor a ring he will have vacuum units

[Ethel]

The centrifugal advance works on the spindle to advance/retard the cam that opens the points. Vacuum advance moves the baseplate that the points are screwed to. If you have, or can fit, a moving baseplate you can have vac advance.