Re: vacuum res can question
[Re: 340KID]
#463975
09/09/09 03:31 PM
09/09/09 03:31 PM
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Joined: Jan 2003
Posts: 21,076
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
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Mine I just used from vacuum to can can to check valve in booster.Should still work as long as the valve isnt backwards.Just run hose valve at can hose to valve in booster.With 13 inch vacuum your brakes should still work even without it.Rocky
Chrysler Firepower
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Re: vacuum res can question
[Re: 340KID]
#463977
09/09/09 03:47 PM
09/09/09 03:47 PM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
I installed a summitt vacuum can resev on my Cuda 340 - I plumbed it as follows, from intake to check valve on can, brass fitting on can to checkvalve on power brake booster. For some reason it is not working ! The brakes are rock hard, If i disconnect the can and go direct to the brake booster the brakes work, I added the can since i have approx 12-13 hg at idle !
Do I need to remove one of the check valves ?
Nope leave both check valves in.
Maybe the check valve in the can is bad. There should be two ports in the can usually i put a gauge in the one not being used. try this and see what your reading is.
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Re: vacuum res can question
[Re: therocks]
#463978
09/09/09 03:51 PM
09/09/09 03:51 PM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
Mine I just used from vacuum to can can to check valve in booster.Should still work as long as the valve isnt backwards.Just run hose valve at can hose to valve in booster.With 13 inch vacuum your brakes should still work even without it.Rocky
 however what is your reading in gear at low idle a big cam will seem to be fine while parked but under load i seen it drop from 15" done to 5" Also if it doesn't need the can i would just put it aside until you need it. You just will be adding more stuff that could go imo wrong.
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Re: vacuum res can question
[Re: 340KID]
#463979
09/09/09 03:57 PM
09/09/09 03:57 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Did you follow the directions that came with the Summit vacuum reservoir? Have you tried hooking it up the other way?
Definitely would NOT recommend destroying the check valve. It would be useless as a vacuum reservoir if you did. Without that check-valve, the reservoir is more or less like just a big section of hose.
Agree with above, 12-13 in/hg "should" be enough to allow the brakes to work, but only you can judge how much improvement you see after you get the reservoir working.
I added a vacuum reservoir to my '71 Charger, but it only has around 6" in/hg at idle.
You can "Test" the check-valve with a hand-pump vacuum tester, or "perhaps" with a length of hose by mouth.
I could be defective, but I doubt it.
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Re: vacuum res can question
[Re: D_C]
#463982
09/09/09 04:14 PM
09/09/09 04:14 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Is "this" the reservoir (or similar?)  Seems like you have it correct. You do have the White Check-Valve connected to the Intake-manifold source, and the Barbed Brass connector connected by hose to the Factory Check-Valve ON the Power-Brake Booster, correct? What about your intake vacuum source? It does receive full manifold vacuum, correct?
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Re: vacuum res can question
[Re: 70sixpkrt]
#463987
09/09/09 04:56 PM
09/09/09 04:56 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Just checked/verified and Mine has Both check-valves (One on the canister, one on the power-brake booster.)
Try hooking it up the other way, Brass-Barbed Connector to Intake-Manifold and White Check Valve connection (by hose) to the Factory Check-Valve on the Power-Brake Booster.
I did mine many, many years ago, so my memory is a bit hazy on the subject, but it seems to me I had mine hooked up wrong initially, then I tried it the other way and it worked.
I just can't remember now which way that was, and the connections on my reservoir are not as obvious as the ones on yours.
Anyway, try it the other way, it just may work.
When you consider the operation... all the air flows TO the intake manifold. Logically, it seems like it should have a check valve between Manifold and Vacuum Reservoir, but perhaps not or perhaps the One-Way check-valve is not working in the correct direction of flow.
All I know, is that it "Should" work or at least allow the brakes to still work as they did without the vacuum canister.
On mine, without that Vacuum-Booster, I have about One, Good Pump on the brakes. With the vacuum-reservoir, they pretty much function as well as the brakes did from the Factory with a factory cam-shafted engine.
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Re: vacuum res can question
[Re: 340KID]
#463988
09/09/09 05:53 PM
09/09/09 05:53 PM
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Joined: Mar 2003
Posts: 15,491
the boonies
aarcuda
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
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Quote:
I installed a summitt vacuum can resev on my Cuda 340 - I plumbed it as follows, from intake to check valve on can, brass fitting on can to checkvalve on power brake booster. For some reason it is not working ! The brakes are rock hard, If i disconnect the can and go direct to the brake booster the brakes work, I added the can since i have approx 12-13 hg at idle !
Do I need to remove one of the check valves ?
this is the right way to do it. To check it, disconnect the hose from the brake booster and start the car. you should feel vacuum at the end of that hose. Plug it back in to the booster check valve and it should work.
give it some time to build up vacuum. rev it up and down a bit
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