Time by Vacuum

mrtleavitt · Post by **mrtleavitt** » Sun Feb 22, 2009 5:28 pm

How exactly do you time by vacuum?

Post by **DuckRyder** » Sun Feb 22, 2009 7:31 pm

Highest vacuum reading.

Dragon · Post by **Dragon** » Sun Feb 22, 2009 8:44 pm

Works good most of the time. When you do that at 5000 feet you over time the engine.

willowbilly3 · Post by **willowbilly3** » Sun Feb 22, 2009 9:34 pm

You will usually have to back it up just a little from top vacuum reading.

fmartin_gila1 · Post by **fmartin_gila1** » Mon Feb 23, 2009 6:18 am

I back it down one inch of vacuum, this ensures no ping.

Fred

willowbilly3 · Post by **willowbilly3** » Mon Feb 23, 2009 10:04 am

A timing light is still best.

rubiranch · Post by **rubiranch** » Mon Feb 23, 2009 9:49 pm

willowbilly3 wrote:You will usually have to back it up just a little from top vacuum reading.

willowbilly3 wrote:A timing light is still best.

I would agree with both of these answers.

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