Vacuum gauge and vacuum advance

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moggiegeek
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Vacuum gauge and vacuum advance

Post by moggiegeek »

Is there any reason not to tee-off a vacuum gauge pipe from the same vacuum advance pipe drilling on the body of, in this case, a HIF38?
philthehill
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Re: Vacuum gauge and vacuum advance

Post by philthehill »

I would suggest that you will get a better indication of the manifold depression/vacuum if the take off is directly from the inlet manifold.
You may not get get a indication of the correct degree of depression/vacuum in the manifold as the vacuum take off at the carb is basically in the wrong place for a gauge.

moggiegeek
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Re: Vacuum gauge and vacuum advance

Post by moggiegeek »

Thanks Phil, problem is that inlet manifold is steel tube courtesy of Manifold and although they provide a servo take off steel welded stub there is nothing for a gauge.
moggiegeek
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Re: Vacuum gauge and vacuum advance

Post by moggiegeek »

Correction Maniflow
philthehill
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Re: Vacuum gauge and vacuum advance

Post by philthehill »

No problem - drill and tap the Maniflow manifold to suit the vacuum gauge take off. Better still once fitted braze the adapter in place.

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