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How to time an engine using a vacuum gauge

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How to time an engine using a vacuum gauge

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Old

Dec 3, 2006 | 07:31 PM

#1

packrat56

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Fleet Mechanic

Joined: Apr 2004

Posts: 1,443

Likes: 5

From: Willamette Valley, Oregon

How to time an engine using a vacuum gauge

I know there is another forum for 302s, but I trust the answers here

I have a 1971 302 from a Torino in my 56' It never seems right when I time it with a light, and I have to fuss with it by ear/feel. Has an RV cam, 2 bbl Holly. Pretty stock. Drop in Pertronix in a stock distributor (reman)

I know there is a way to use vacuum to judge the best distributor position, anyone remember the procedure?

Thanks

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Old

Dec 3, 2006 | 08:00 PM

#2

seetwisted

Senior User

Joined: Jun 2004

Posts: 264

Likes: 0

From: las vegas nv.

Highest steady vacuum without the engine missing...used this on my old 223 ci. To be honest though, I've never tried it on an 8 cyl engine. More to it anyone?

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Old

Dec 3, 2006 | 08:04 PM

#3

ALBUQ F-1

Fleet Owner

Joined: Jul 2004

Posts: 27,283

Likes: 1,046

From: NM

Flatheads use this method: go to highest vacuum, retard to get vacuum to drop one inch (1").

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Old

Dec 3, 2006 | 08:33 PM

#4

packrat56

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Fleet Mechanic

Joined: Apr 2004

Posts: 1,443

Likes: 5

From: Willamette Valley, Oregon

Gauge direct to the manifold? (plate under carb?) Oh, and to retard is counterclockwise???

Last edited by packrat56; Dec 3, 2006 at 08:37 PM.

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Tags

235, block, ear, engine, ford, gauge, small, time, tme, vacuum

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