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Mustang Technical Discussion > Pre 1973 > Vacuum advance > Community Forums > Mustang Forum Australia - Mustang Tech

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potto
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Location: perth

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Sorry to make my first post a question but here goes

I have a 66 coupe with a 302 and cruise o matic 3 speed. The car has been running a little rough lately and over heating, so I gave her a birthday and bought an ali radiator, a new dizzy and leads and a procomp 350 2 barrel carby. I went to put on the carb and found there is no vacuum advance outlet on it, there is an outlet on the base but it gives way to much suction. The new dizzy has an adjustable vaccy advance, so I was wondering if that is the only option( turn it down as far as it goes) or should i try and connect it to the air cleaner.
Thanks for any help or answers they are appreciated.
I will try and contribute where I can
Potto


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jas24zzk
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Carb should have a vac outlet. look again, or failing that, read the manual on it.

Remember Vac advance is only there to help with the cruise economy, its not going to hurt the engine if it is not connected


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mikes68
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potto wrote
Sorry to make my first post a question but here goes

I have a 66 coupe with a 302 and cruise o matic 3 speed. The car has been running a little rough lately and over heating, so I gave her a birthday and bought an ali radiator, a new dizzy and leads and a procomp 350 2 barrel carby. I went to put on the carb and found there is no vacuum advance outlet on it, there is an outlet on the base but it gives way to much suction. The new dizzy has an adjustable vaccy advance, so I was wondering if that is the only option( turn it down as far as it goes) or should i try and connect it to the air cleaner.
Thanks for any help or answers they are appreciated.
I will try and contribute where I can
Potto


How dare you ask a question on your first post - SET THE DOGS ON HIM Jeff!!! Banish him to the other side for three weeks... Poke


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scott66stang
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mikes68 wrote
potto wrote
Sorry to make my first post a question but here goes

I have a 66 coupe with a 302 and cruise o matic 3 speed. The car has been running a little rough lately and over heating, so I gave her a birthday and bought an ali radiator, a new dizzy and leads and a procomp 350 2 barrel carby. I went to put on the carb and found there is no vacuum advance outlet on it, there is an outlet on the base but it gives way to much suction. The new dizzy has an adjustable vaccy advance, so I was wondering if that is the only option( turn it down as far as it goes) or should i try and connect it to the air cleaner.
Thanks for any help or answers they are appreciated.
I will try and contribute where I can
Potto


How dare you ask a question on your first post - SET THE DOGS ON HIM Jeff!!! Banish him to the other side for three weeks... Poke
Very Happy Very Happy And welcome to the Forum Mate Like


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hybrid
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potto wrote
and a procomp 350 2 barrel carby.


So that was your first mistake!


You should not have your vacuum advance connected to manifold pressure.
The vacuum advance should be connected to a port that enters the carb just above the throttle plate at idle.

In other words, it should see very little vacuum at idle, and should only be exposed to manifold pressure once the throttle opens.


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Exhausted
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Joined: Dec 31, 2010
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Location: Perth

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mikes68 wrote
potto wrote
Sorry to make my first post a question but here goes

I have a 66 coupe with a 302 and cruise o matic 3 speed. The car has been running a little rough lately and over heating, so I gave her a birthday and bought an ali radiator, a new dizzy and leads and a procomp 350 2 barrel carby. I went to put on the carb and found there is no vacuum advance outlet on it, there is an outlet on the base but it gives way to much suction. The new dizzy has an adjustable vaccy advance, so I was wondering if that is the only option( turn it down as far as it goes) or should i try and connect it to the air cleaner.
Thanks for any help or answers they are appreciated.
I will try and contribute where I can
Potto


How dare you ask a question on your first post - SET THE DOGS ON HIM Jeff!!! Banish him to the other side for three weeks... Poke

You're a cruel, cruel man Mike. Probably scared the bejesus from Potto.
Welcome fellow West Australian. Don't worry about Mike. He's like that! Give Me Beer!


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potto
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Exhausted wrote
mikes68 wrote
potto wrote
Sorry to make my first post a question but here goes

I have a 66 coupe with a 302 and cruise o matic 3 speed. The car has been running a little rough lately and over heating, so I gave her a birthday and bought an ali radiator, a new dizzy and leads and a procomp 350 2 barrel carby. I went to put on the carb and found there is no vacuum advance outlet on it, there is an outlet on the base but it gives way to much suction. The new dizzy has an adjustable vaccy advance, so I was wondering if that is the only option( turn it down as far as it goes) or should i try and connect it to the air cleaner.
Thanks for any help or answers they are appreciated.
I will try and contribute where I can
Potto


How dare you ask a question on your first post - SET THE DOGS ON HIM Jeff!!! Banish him to the other side for three weeks... Poke

You're a cruel, cruel man Mike. Probably scared the bejesus from Potto.
Welcome fellow West Australian. Don't worry about Mike. He's like that! Give Me Beer!
Does that mean I have to buy a nissan now?
Bugger


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potto
Baby Mustang

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Hi Hybrid
do you think I would be able to hook it up to the air cleaner or would that be not enough vacuum. I didnt really want to be drilling the carby. The procomp seems to be a spitting image of a 350 holley(parts interchangeable) where is the vacuum line on a 2bbl holley?

Thanks again
potto


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nassi
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If you stand at the front of the car looking at the carb, the vac out let is just above the LH (thats your LH) idle mixture screw.
It may just be a port thats blanked off. Unscrew the blank and screw in a barbed fitting.

if needed I can take apick of an old Holley 2 barrel carb sitting in the shed.
If your anywhere near Sevill Grove your welcome to come and see for yourself.
cheers


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nassi
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Do you have a port somewhere near the red circle?


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hybrid
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Air cleaner is no good either.
Looks like you've got a friend in Nassi... nice one.

I would be very surprised if there is no method at all to connect vacuum advance.. even on a procomp.


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Pinto-Pete
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last word say's it all I believe Jeff.......


I'm Batman...

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5/89-91 Canterbury rd Kilsyth vic.
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potto
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Thanks Nassi
I am trying to post a photo of both sides of the carb but it won't let me. Both sides have the adjustments on the metering block like yours but nothing else not even a spot to drill or remove. Now I have an old 390 4bbl and a 650 double pumper in the shed would the metering blocks of those fit on a 350 or are they larger to fit the bigger carby. Thanks for the offer as well.

Potto


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nassi
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I'll leave the carb questions to those who know.
cheers


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hybrid
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Heres a tutorial on posting pics

www.mustangtech.com.au.../t=12.html


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