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Author
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Topic: stock dual vacuum distributor line hook up
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68 S-code GT
Gearhead Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-27-2002 07:25 AM
   
I��m going to try a repost with a different title to see if I get a better response  I have the small block running in my coupe but after looking at the 68 shop manual I��m starting to question what I did! I have the stock dual vacuum distributor and only hooked up the vacuum line from the carb. I installed a chrome water neck so I don��t have the temperature valve. I didn��t think I needed the extra advance to cool the car if it got hot and just capped off the appropriate ports! Is this the right thing to do?
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Pierre
Gearhead Posts: 366
From: France
Registered: Apr 2002
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posted 06-27-2002 08:12 AM
If your question is : Is my set-up going to work with type of distributor ? I would say yes as long as you adjust initial timing + regular vaccum advance + mechanical advance accordingly.
Most mustang I have seen are not equipped with this type of timing control device and work very well.
The advantage of this device is probably easier cold start & better fuel economy during warm-up: during a cold start explosions spread slower in the cylinder, by advancing the spark a little bit when cold, your engine will run more efficiently and save gas. It takes 10 minutes for my car to warm up and have lived without it for a whileJust my opinion
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68 S-code GT
Gearhead Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-28-2002 07:20 AM
I just need to know if I only run the line from the carb source to the carb vacuum advance, will it work properly or like a single advance distributor?
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mellowyellow
Gearhead Posts: 5739
From: So. Fl.
Registered: Aug 2000
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posted 06-28-2002 07:35 AM
I dont know if all 68's had that vacum advance but I did away with all the vac lines and changed the vac advance AND dist, to a 67 on my ex 68 cv which was an AC car. Still have the distributor. It was the start of the emission era.
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Pierre
Gearhead Posts: 366
From: France
Registered: Apr 2002
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posted 06-28-2002 09:11 AM
quote:
Originally posted by 68 S-code GT:
I just need to know if I only run the line from the carb source to the carb vacuum advance, will it work properly or like a single advance distributor?
As I tried to explain in my previous post I think it will work properly since the second vaccum advance (the one you plugged) has a very limited action on timing.
You can easily verify that with a timing light anyway
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Bob Hopkins
Gearhead Posts: 243
From: BRIDGEPORT NJ USA
Registered: Jan 2001
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posted 06-28-2002 09:55 AM
I'll give my $0.02 The duel dia. dist advance is emission reason only,the front one was normal vacumn only,and the rear was vacumn retardfor reducing emissions at idle in 60's. You can block the rear and run manafold vacumn to front,or I think even better ditch the duel chamber and replace it with a single diaphram model pre emissions vacumn chamber.
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68 S-code GT
Gearhead Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 06-30-2002 03:38 PM
I have a Duraspark out of a 78 Mustang that I think I��m going to try to use. I saw some good stuff on 65coupei6��s web site.
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