The Ford Barn

George49Ford · 11-10-2013, 12:23 PM

I have Stock 2V 302. Distributor has TWO vacuum hoses to it. How important is it keep both of those? Can it be replaced with a single hose advance and still function? Thank You for any input.

craig · 11-10-2013, 01:32 PM

the outside port is for advancing the timing, the inside retards the timing. you can eliminate the retard side, just make sure you don't end up with more than 38 degrees total timing when the outside is connected. the retard side was for at idle to help control the hc levels

craig · 11-10-2013, 01:35 PM

also, yes you can install a single diaphram unit

George49Ford · 11-10-2013, 02:06 PM

Thank You Craig.

Ole Don · 11-10-2013, 02:47 PM

I bought a Torino new in 73 with a 302. I put in a dizzy with a custom curve and a vacuum advance from a 289 and set the initial with a vacuum gauge. The stock 2 barrel had jets about two numbers larger, and it met idle CO during a test in 75 for Minnesota law at that time. It also got two to four more MPG. It also had 351 W exhaust manifolds and a 351 Y pipe cut and welded to fit. Drove the car 111,000 like that, sold it to a nephew who drove it 2 0r 3 more years.

George49Ford · 11-10-2013, 08:07 PM

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Thank You for input. I don't think too many cars have that set up. Just not sure how well it works. Tnx agin.

George49Ford · 11-11-2013, 08:03 PM

Update - got a single port vacuum advance unit from NAPA. Poor guy had a heck of a time finding one. Put it on and blocked off that little "vacuum tree" and, so far, seems to run fine.

11-10-2013, 12:23 PM	#1
George49Ford Senior Member Join Date: May 2010 Location: Carson City, NV Posts: 179	Vacuum Advance 1971 2V 302 I have Stock 2V 302. Distributor has TWO vacuum hoses to it. How important is it keep both of those? Can it be replaced with a single hose advance and still function? Thank You for any input.

11-10-2013, 01:32 PM	#2
craig Senior Member Join Date: May 2010 Location: The Inland Empire of Washington State Posts: 368	Re: Vacuum Advance 1971 2V 302 the outside port is for advancing the timing, the inside retards the timing. you can eliminate the retard side, just make sure you don't end up with more than 38 degrees total timing when the outside is connected. the retard side was for at idle to help control the hc levels

11-10-2013, 01:35 PM	#3
craig Senior Member Join Date: May 2010 Location: The Inland Empire of Washington State Posts: 368	Re: Vacuum Advance 1971 2V 302 also, yes you can install a single diaphram unit

11-10-2013, 02:06 PM	#4
George49Ford Senior Member Join Date: May 2010 Location: Carson City, NV Posts: 179	Re: Vacuum Advance 1971 2V 302 Thank You Craig.

11-10-2013, 02:47 PM	#5
Ole Don Senior Member Join Date: May 2010 Location: St. Michael, Minnesota Posts: 1,713	Re: Vacuum Advance 1971 2V 302 I bought a Torino new in 73 with a 302. I put in a dizzy with a custom curve and a vacuum advance from a 289 and set the initial with a vacuum gauge. The stock 2 barrel had jets about two numbers larger, and it met idle CO during a test in 75 for Minnesota law at that time. It also got two to four more MPG. It also had 351 W exhaust manifolds and a 351 Y pipe cut and welded to fit. Drove the car 111,000 like that, sold it to a nephew who drove it 2 0r 3 more years.

11-10-2013, 08:07 PM	#6
George49Ford Senior Member Join Date: May 2010 Location: Carson City, NV Posts: 179	Re: Vacuum Advance 1971 2V 302 Sponsored Links (Register now to hide all advertisements) Thank You for input. I don't think too many cars have that set up. Just not sure how well it works. Tnx agin.

11-11-2013, 08:03 PM	#7
George49Ford Senior Member Join Date: May 2010 Location: Carson City, NV Posts: 179	Re: Vacuum Advance 1971 2V 302 Update - got a single port vacuum advance unit from NAPA. Poor guy had a heck of a time finding one. Put it on and blocked off that little "vacuum tree" and, so far, seems to run fine.