Brake vacuum on a 6 cylinder
09-23-2009, 09:07 PM
#1
Thread Starter
Join Date: Sep 2009
Location: California
Posts: 23
Brake vacuum on a 6 cylinder
Hi all
Starting a father son project on a 65 with a 6 cylinder automatic transmission.
The car has drums with power brakes and a new booster with a 2 bowl resevoir.
Question: The booster is getting its vacuum from a T connection off the PCV valve. One of the first projects will be to convert it to disc brakes in the front, but for now I would like to know if the vacuum is correct. I don't think it is, but I am not sure what other sources of vacuum I can use since it has a 1 barrel carb.
Any help appreciated.
I am looking forward to working on this with my son. He has already learned a good lesson on how not to bloody his knuckles when we replaced the exhaust manifold last weekend.[IMG][IMG]
[/IMG][/IMG]
Starting a father son project on a 65 with a 6 cylinder automatic transmission.
The car has drums with power brakes and a new booster with a 2 bowl resevoir.
Question: The booster is getting its vacuum from a T connection off the PCV valve. One of the first projects will be to convert it to disc brakes in the front, but for now I would like to know if the vacuum is correct. I don't think it is, but I am not sure what other sources of vacuum I can use since it has a 1 barrel carb.
Any help appreciated.
I am looking forward to working on this with my son. He has already learned a good lesson on how not to bloody his knuckles when we replaced the exhaust manifold last weekend.[IMG][IMG]
[/IMG][/IMG]
09-24-2009, 09:26 AM
#3
6th Gear Member
Join Date: May 2009
Location: PA
Posts: 5,232
The car has drums with power brakes and a new booster with a 2 bowl resevoir.
Question: The booster is getting its vacuum from a T connection off the PCV valve. One of the first projects will be to convert it to disc brakes in the front, but for now I would like to know if the vacuum is correct. I don't think it is, but I am not sure what other sources of vacuum I can use since it has a 1 barrel carb.
Question: The booster is getting its vacuum from a T connection off the PCV valve. One of the first projects will be to convert it to disc brakes in the front, but for now I would like to know if the vacuum is correct. I don't think it is, but I am not sure what other sources of vacuum I can use since it has a 1 barrel carb.
Last edited by 2+2GT; 09-24-2009 at 09:42 AM.
09-24-2009, 10:08 AM
#4
6th Gear Member
Join Date: Oct 2006
Location: Cork, Ireland
Posts: 6,417
Joe: Nice of you to post your brake setup, but won't help the original poster since you don't have powerbrakes. you are missing the booster and won't need that vacuum hookup
cookstang: welcome to the forums.
I agree with 2+2, the valvecover hookup will "get rid of" all the manifold vacuum you produce. there will be nothing left over (can you say that really for vacuum?) for the brake booster.
I don't know if you can make head and toe of the illustration that 2+2 sent.
In your case (6cyl) you attach the hose from brake booster to a hardline that is going straight to the intake manifold.
You might have a t-piece in there so other components can use the vacuum as well, but trhe only one I'd share with my brakes would be the vacuum modulator for the automatic transmission. just like in the picture if you have one.
I'd say your next question should be (and I don't know): where should I hook the PCV at valve cover to (is there even a PCV there). I don't have experience on the I6.
Anyway, don't share the precious vacuum for the booster with anything if you can avoid it
cookstang: welcome to the forums.
I agree with 2+2, the valvecover hookup will "get rid of" all the manifold vacuum you produce. there will be nothing left over (can you say that really for vacuum?) for the brake booster.
I don't know if you can make head and toe of the illustration that 2+2 sent.
In your case (6cyl) you attach the hose from brake booster to a hardline that is going straight to the intake manifold.
You might have a t-piece in there so other components can use the vacuum as well, but trhe only one I'd share with my brakes would be the vacuum modulator for the automatic transmission. just like in the picture if you have one.
I'd say your next question should be (and I don't know): where should I hook the PCV at valve cover to (is there even a PCV there). I don't have experience on the I6.
Anyway, don't share the precious vacuum for the booster with anything if you can avoid it
09-24-2009, 11:04 AM
#5
6th Gear Member
Join Date: May 2009
Location: PA
Posts: 5,232
I don't know if you can make head and toe of the illustration that 2+2 sent.
In your case (6cyl) you attach the hose from brake booster to a hardline that is going straight to the intake manifold.
You might have a t-piece in there so other components can use the vacuum as well, but trhe only one I'd share with my brakes would be the vacuum modulator for the automatic transmission. just like in the picture if you have one.
I'd say your next question should be (and I don't know): where should I hook the PCV at valve cover to (is there even a PCV there). I don't have experience on the I6.
Anyway, don't share the precious vacuum for the booster with anything if you can avoid it
In your case (6cyl) you attach the hose from brake booster to a hardline that is going straight to the intake manifold.
You might have a t-piece in there so other components can use the vacuum as well, but trhe only one I'd share with my brakes would be the vacuum modulator for the automatic transmission. just like in the picture if you have one.
I'd say your next question should be (and I don't know): where should I hook the PCV at valve cover to (is there even a PCV there). I don't have experience on the I6.
Anyway, don't share the precious vacuum for the booster with anything if you can avoid it
The PCV connects to the rear of the valve cover, and to a fitting on the carb spacer pointed toward the battery. The upper photo, above, has the PCV hose routed incorrectly, probably because it's generic straight hose, not the proper moulded type, which is available. The lower photo shows it routed correctly.
09-24-2009, 12:13 PM
#6
Join Date: Sep 2009
Location: Delaware
Posts: 46
10-28-2009, 10:50 PM
#9
Thread Starter
Join Date: Sep 2009
Location: California
Posts: 23
Help finding a part
Hey guys
Finally getting around to fixing this. Got delayed by installing a new radiator, water pump, etc.
I am having a hard time finding the vacuum fitting for the manifold that 2+2 posted in his photo. The fitting is the L shaped fitting that threads into the manifold. No luck in the local auto parts (there are only two parts stores nearby and neither is very good).
Anybody know where I might be able to order one? I havent had much luck with the usuals ( CJ Pony parts, NPD, etc.) Any help would be appreciated.
Finally getting around to fixing this. Got delayed by installing a new radiator, water pump, etc.
I am having a hard time finding the vacuum fitting for the manifold that 2+2 posted in his photo. The fitting is the L shaped fitting that threads into the manifold. No luck in the local auto parts (there are only two parts stores nearby and neither is very good).
Anybody know where I might be able to order one? I havent had much luck with the usuals ( CJ Pony parts, NPD, etc.) Any help would be appreciated.
10-28-2009, 10:59 PM
#10
You will need to find a ****** Brass Fitting/Adapter.
Really? They censored b a r b e d.....
http://www.summitracing.com/search/?...fittings&dds=1
Tomorrow I'll measure my ****** fitting I have threaded into my manifold. I put one in for my PCV valve.
This is getting annoying. once again that is b a r b e d (take out spaces).
Really? They censored b a r b e d.....
http://www.summitracing.com/search/?...fittings&dds=1
Tomorrow I'll measure my ****** fitting I have threaded into my manifold. I put one in for my PCV valve.
This is getting annoying. once again that is b a r b e d (take out spaces).
Last edited by 1slow67; 10-28-2009 at 11:05 PM.