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#1
06-16-2023, 10:57 AM
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Vacuum advance connection.
I have a 1970 carb with a 1968 intake. On previous cars, I hooked the vacuum advance to a connection at the base of the carb. This carb has no such connection. How do I get a vacuum signal to the distributor?
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#2
06-16-2023, 11:19 AM
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Somewhere on the carb or intake, you should have a vacuum port for full manifold vacuum. Post pics of all sides of both carb and intake. Do you have power brakes? If yes, they should be hooked up to full manifold vacuum. You can T off that port?
__________________
1965 Pontiac GTO 455/469 w/ #48 Heads, '65 Tri-Power 9.25:1 CR Stump Puller Cam Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00 3.55 Rear Differential Front: 225/60R15 Height: 25.6" Rear: 275/60R15 Height: 28" |
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#3
06-16-2023, 11:28 AM
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The steel fuel line into the Carb is so darn bent up and pinched off I would first be more concerned about fuel getting to the Carb then vacuum to the Dizzy!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#4
06-16-2023, 01:23 PM
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It looks worse than it is!. Haha. It's just temporary. I have another on the way, but it takes forever to get here in the Great White North.
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| The Following User Says Thank You to 66sprint6 For This Useful Post: | ||
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#5
06-16-2023, 01:59 PM
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will a vacuum tree work?
https://www.yearone.com/Product/1967...m-parts/cf7274
__________________
“We don’t build a ‘luxury’ car. We build a performance car then we make it luxurious.” |
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#6
06-16-2023, 02:06 PM
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I run mine to manifold vacuum off the tree on the back of the throttle body for the brake booster. Works great. Great idle. Runs cool even sitting still at idle.
__________________
70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
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#7
06-16-2023, 04:32 PM
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you could add it like the factory did it. the biggest challenge is getting the hole the base plate in the right place. needs to be right above the throttle blade. you'll need to make sure the throttle pates are set correctly before drilling.
__________________
1979 Firebird Trans Am 301/4spd (Now 428) 1977 Firebird Formula 400/Auto 2007 Grand Prix GXP 5.3L |
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#8
06-18-2023, 04:53 PM
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You could easily install a hollow carb mounting stud as was used in earlier Pontiacs and get your distributor manifold vacuum source. A 5 minute job.
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Jeff 
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#9
06-18-2023, 05:54 PM
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I use to have 10 of these on hand from junk yard hunt days.
I would send you one if I still had any.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#10
06-19-2023, 08:49 AM
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So full manifold vacuum to the advance can on the dizzy? It's not hard to create that, but I thought that it was metered.
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