With or Without Vacuum Advance

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Sep 25, 2014 | 11:07 AM

Sea five

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Joined: Nov 2009

Posts: 266

With or Without Vacuum Advance

I'm looking at new distributors (Pertronix) and I'm not sure if I should go with or without vacuum advance. Any opinions please

Thanks

Sep 25, 2014 | 11:19 AM

MDchanic

Connoisseur d'Junque

Joined: Sep 2010

Posts: 21,183

From: The Hudson Valley

2¢: If you're going to be racing it, go without the vacuum advance.
If you're going to be driving it on the street, go with the vacuum advance.

- Eric

Sep 25, 2014 | 11:29 AM

455man

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Joined: Nov 2010

Posts: 1,070

From: Wichita, Ks

Sep 25, 2014 | 11:47 AM

Run to Rund

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Joined: Mar 2008

Posts: 4,024

if street and strip, vacuum advance is still good. Improves economy and engine runs cooler at low to mid rpm cruising. If the camshaft is "lumpy" the extra advance helps to smooth out the idle also.