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#1
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power brake booster question
Group, can anyone share a photo of where the power brake booster vacuum line hooks in to the intake manifold? On my 1967 Firebird, I have an older motor that doesn't seem to have the same vacuum hookups on the intake manifold deck the stock one did.
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#2
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The vacuum line goes to the baseplate of the carb, not the intake.
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- Mike '69 Firebird 400 - Goldenrod Yellow, 455 +.060, '6s-7' heads, Comp Cam 276AH-10 (51-309-4), TH400, Ford 9-inch w/3.08, 800cfm Q-jet, Stock Intake, Hooker Headers, Flowmasters '68 Coronet 500 Convertible - Medium Gold Metallic, stock 318 +100,000 miles |
The Following User Says Thank You to Hikin Mike For This Useful Post: | ||
#3
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Thank you. I've got a TH350 that will need vacuum also. The vac hose from the brake booster is a good size and that carb baseplate port is much smaller.
Do you think it can handle both the transmission and the booster both? |
#4
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I assumed you had a Quadrajet. No idea how the 2-bbl connects.
__________________
- Mike '69 Firebird 400 - Goldenrod Yellow, 455 +.060, '6s-7' heads, Comp Cam 276AH-10 (51-309-4), TH400, Ford 9-inch w/3.08, 800cfm Q-jet, Stock Intake, Hooker Headers, Flowmasters '68 Coronet 500 Convertible - Medium Gold Metallic, stock 318 +100,000 miles |
#5
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What would you think about putting a tee in that big pcv line to enable vacuum to the booster?
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#6
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I don't see why not.
__________________
- Mike '69 Firebird 400 - Goldenrod Yellow, 455 +.060, '6s-7' heads, Comp Cam 276AH-10 (51-309-4), TH400, Ford 9-inch w/3.08, 800cfm Q-jet, Stock Intake, Hooker Headers, Flowmasters '68 Coronet 500 Convertible - Medium Gold Metallic, stock 318 +100,000 miles |
#7
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You will need a 1/8" NPT fitting for 3/8" hose to the brake booster, threaded into the fitting already sitting at rear of base plate.
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#8
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Here is a picture of a 69 2bbl engine with TH400, AC and power brakes. looking from above at the back of the carb.
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
#9
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Ok thank you for that photo north and the advice from Hikin Mike and Kenth. I guess that settles it. I would have thought that port behind the carb was too small to supply a big brake booster and transmission but if it was good enough for Pontiac, it's good enough for me
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