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  stock dual vacuum distributor line hook up

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Author Topic:   stock dual vacuum distributor line hook up
68 S-code GT
Gearhead

Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000

posted 06-27-2002 07:25 AM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
Iím 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 Iím 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 donít have the temperature valve. I didnít 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

posted 06-27-2002 08:12 AM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
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 while

Just my opinion

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68 S-code GT
Gearhead

Posts: 1129
From: Sayreville, NJ, US
Registered: Mar 2000

posted 06-28-2002 07:20 AM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 07:35 AM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 09:11 AM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 09:55 AM     Click Here to See the Profile for Bob Hopkins   Click Here to Email Bob Hopkins     Edit/Delete Message   Reply w/Quote
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

posted 06-30-2002 03:38 PM     Click Here to See the Profile for 68 S-code GT   Click Here to Email 68 S-code GT     Edit/Delete Message   Reply w/Quote
I have a Duraspark out of a 78 Mustang that I think Iím going to try to use. I saw some good stuff on 65coupei6ís web site.

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