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The Cars => 1966 Shelby GT350/GT350H => Topic started by: gimmea250swb on June 13, 2019, 07:23:32 PM

Title: Manifold Vacuum - where is it?
Post by: gimmea250swb on June 13, 2019, 07:23:32 PM
I'm sorry for the novice question but I've never tuned a carb before.  Where do I hook up the vacuum pressure meter?  I've got a 3259-1 carb.  I see new carbs have a nipple you can access directly on the carb but it doesn't look like the 3259 has one.  Do I hook it up to the actual manifold?  My guess is I pull the 1" hose coming off the front driver's side on the manifold.  Is this correct or is there an easier place?

Title: Re: Manifold Vacuum - where is it?
Post by: Coralsnake on June 13, 2019, 07:36:15 PM
Only if you want engine coolant to spray out. Thats a heater hose.

You might have an accessible port somewhere else on the manifold
Title: Re: Manifold Vacuum - where is it?
Post by: gimmea250swb on June 13, 2019, 08:08:32 PM
Ha!  I should've looked.  The hose goes through the firewall.  How about is one to the rear?
Title: Re: Manifold Vacuum - where is it?
Post by: zray on June 14, 2019, 05:11:50 AM
you should have several options, for example , the pcv hose should be hooked up to manifold vacuum.

Z.
Title: Re: Manifold Vacuum - where is it?
Post by: J_Speegle on June 15, 2019, 04:31:26 PM
Yes you could use that unused rear port after removing the plug and installing a correct nipple fitting for the rubber tubing to the gauge then replacing plug after your done adjusting things
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