brake booster vac hose location? '67 352 FE

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Carb
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brake booster vac hose location? '67 352 FE

Postby Carb » Thu May 18, 2017 6:00 pm

I ordered a brake booster for my '67 f100 352. That model originally had no brake booster.

Where do I plug the booster vacuum hose in? diagram is vague. looks like the manifold or back of carb (spacer plate?).

I have seen notes there may be a plug on the manifold i am supposed to use. Is this correct? anyone have a pic they can show me?

Thanks in advance,

carb

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Re: brake booster vac hose location? '67 352 FE

Postby Mach428 » Fri May 19, 2017 5:03 am

There should be a plug at the back of your manifold that is connected to one of the runners. This is the best place since it is away from turbulence at the carburetor. Remove the plug and screw in a nipple (available from most auto part stores)

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Re: brake booster vac hose location? '67 352 FE

Postby Carb » Fri May 19, 2017 9:33 am

Mach428 wrote:There should be a plug at the back of your manifold that is connected to one of the runners. This is the best place since it is away from turbulence at the carburetor. Remove the plug and screw in a nipple (available from most auto part stores)


No sure what you mean by runners?

I saw in one photo a spot on the manifold, looking from the front, on the left of the carb on the manifold. I will check there and report back.

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Re: brake booster vac hose location? '67 352 FE

Postby Mach428 » Fri May 19, 2017 11:21 am

Runners are the raised portion that goes to each cylinder bank

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Re: brake booster vac hose location? '67 352 FE

Postby sargentrs » Fri May 19, 2017 4:40 pm

Like this...
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Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: viewtopic.php?f=22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1964 Ford Fairlane 500. 289/Cruise-O-Matic, A/C, P/S.

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Re: brake booster vac hose location? '67 352 FE

Postby Carb » Fri May 19, 2017 6:06 pm

sargentrs wrote:Like this...


Thank you! I did see that, it is currently occupied by a small thin curved hose, looks like part of the pcv(?) unit?

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Re: brake booster vac hose location? '67 352 FE

Postby sargentrs » Fri May 19, 2017 7:15 pm

:hmm: If that 's the hose from the PCV, then that should be connected to a port on the back of the carb spacer or carburetor itself.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: viewtopic.php?f=22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1964 Ford Fairlane 500. 289/Cruise-O-Matic, A/C, P/S.

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Re: brake booster vac hose location? '67 352 FE

Postby sargentrs » Fri May 19, 2017 7:17 pm

Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: viewtopic.php?f=22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1964 Ford Fairlane 500. 289/Cruise-O-Matic, A/C, P/S.

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Re: brake booster vac hose location? '67 352 FE

Postby Carb » Sat May 20, 2017 10:42 am

this is the tube in that same spot i was talking about. What is it for?

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Re: brake booster vac hose location? '67 352 FE

Postby Carb » Sat May 20, 2017 10:43 am

Carb wrote:
sargentrs wrote:Like this...


Thank you! I did see that, it is currently occupied by a small thin curved hose, looks like part of the pcv(?) unit?


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Re: brake booster vac hose location? '67 352 FE

Postby sargentrs » Sat May 20, 2017 1:12 pm

Sorry, I don't know what all that mess is behind your carb. The only hard tube application coming from an intake that I can think of is a line going to the modulator valve on an automatic transimission. Not sure what that canister next to your firewall is for and is that a hose coming from it going into your firewall? And that also has a hose going to the base of your carb? Maybe you have a water cooled carb spacer? I've heard of them but have no experience with them. Somebody a little more knowledgeable in FE engine accessories is going to have to chime in here on that one.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: viewtopic.php?f=22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1964 Ford Fairlane 500. 289/Cruise-O-Matic, A/C, P/S.

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Re: brake booster vac hose location? '67 352 FE

Postby Carb » Sat May 20, 2017 2:08 pm

sargentrs wrote:Sorry, I don't know what all that mess is behind your carb. The only hard tube application coming from an intake that I can think of is a line going to the modulator valve on an automatic transimission. Not sure what that canister next to your firewall is for and is that a hose coming from it going into your firewall? And that also has a hose going to the base of your carb? Maybe you have a water cooled carb spacer? I've heard of them but have no experience with them. Somebody a little more knowledgeable in FE engine accessories is going to have to chime in here on that one.


Thanks for responding. It does look a little confusing. If we start at the carb, the piece coming off the T vertically (which appears to disapper into the firewall) is actually the hose that comes off the valve cover (i had to swing it out of the way to get the shot). so it appears to be part of the EGR system i suppose. The blocked port on the left is what I closed off after removing the Thermactor.

so for some reason that thin hose is pulling a vacuum into the manifold from that strange cap unit, i am guessing as part of the emissions system?

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Re: brake booster vac hose location? '67 352 FE

Postby sargentrs » Sun May 21, 2017 5:39 am

If that's just emissions stuff then I would disconnect, remove, and cap/plug anything that's attached. First thing I do with any older vehicle, when emissions is not required in my area, is get rid of it all. Run a hose from the PCV in the valve cover to the port at the back of the carb/spacer and use that port in the intake, where the metal line is, to provide the vacuum source to the brake booster.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: viewtopic.php?f=22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1964 Ford Fairlane 500. 289/Cruise-O-Matic, A/C, P/S.


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