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Old 11-03-2012, 06:00 PM
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Vacuum Reserve Canister Plumbing?

I ordered a vacuum canister last week and have a question about placement. My engine makes only 9 " of vacuum at idle, 18" at 1200 RPM and I am running a dual diaphram 7" booster, one good stop - then hard pedal, but you can still lock'em up.
My question is on placement of the can. I figure it should as close to the booster as possible but I'm going to have to run about 5'of
vacuum hose from the manifold to the can then 2' back to the booster. Will this have an adverse effect on what what I'm trying to accomplish? I don't want to run a noisey Vac pump if possible!
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Old 11-03-2012, 09:18 PM
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vacuum 9 inches

Get yourself a SSBC electric vacuum pump and have a steady 18--21 inches of vacuum. You only hear the pump when you hit the brake before you start the car. Turn up the sterio and block it out....LMAO.

My 35 coupe with 7" dual diaphram booster 1 1/8 bore master , 4 piston wilwood brakes all around, stopped like crap and was a heart stopper when driving until i got it sorted with the vacuum pump. I highly recommend it.

I had 13" max at idle and 2000 rpm, it just doesn't work when your running a healthy camshaft with lift and duration. Pump solved the problem.

I already bought another for my new 35 steel chev roadster build.

mike
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Old 11-04-2012, 12:57 AM
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Quote:
Originally Posted by Curmudgeon29 View Post
I ordered a vacuum canister last week and have a question about placement. My engine makes only 9 " of vacuum at idle, 18" at 1200 RPM and I am running a dual diaphram 7" booster, one good stop - then hard pedal, but you can still lock'em up.
My question is on placement of the can. I figure it should as close to the booster as possible but I'm going to have to run about 5'of
vacuum hose from the manifold to the can then 2' back to the booster. Will this have an adverse effect on what what I'm trying to accomplish? I don't want to run a noisey Vac pump if possible!
You would like the reservoir as close to the booster as possible, but 2' from the booster is not too far away. Just don't expect miracles.
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Old 11-04-2012, 11:21 AM
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I made a loop to the tank with a "tee" tap for the booster.

Russ
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Old 11-10-2012, 04:54 PM
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Installed Vacuum pump!

I installed my Summit 760152 vacuum pump today, I now have power brakes....consistantly, every time.
It still doesn't stop like the family sedan, but when you consider the mix of parts that we use in these cars,
I'm happy and I'll keep tweeking!
Thanks guys!
Joe
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Old 11-11-2012, 12:51 AM
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Quote:
Originally Posted by Curmudgeon29 View Post
I installed my Summit 760152 vacuum pump today, I now have power brakes....consistantly, every time.
It still doesn't stop like the family sedan, but when you consider the mix of parts that we use in these cars,
I'm happy and I'll keep tweeking!
Thanks guys!
Joe
Good job! I cannot help but think you made a wise choice over using a reservoir.
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Old 11-24-2012, 10:01 PM
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OK! New question. Now that I've installed the vacuum pump and have decent power assist, would there be any advantage to add
a vacuum storage canister? Would that really do anything? Seems like when you step on the brakes the pump will run either way. Maybe it would give me an extra stab! I don't know.
What do you think!
Below is a picture of the pump mounted under the floor. ( picture is upside-down )
Thanks! Joe
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Old 11-24-2012, 10:10 PM
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Quote:
Originally Posted by Curmudgeon29 View Post
OK! New question. Now that I've installed the vacuum pump and have decent power assist, would there be any advantage to add
a vacuum storage canister? Would that really do anything? Seems like when you step on the brakes the pump will run either way. Maybe it would give me an extra stab! I don't know.
What do you think!
Below is a picture of the pump mounted under the floor. ( picture is upside-down )
Thanks! Joe
Honestly, I see no advantage to running a reservoir. Like you said, it'll maybe get you an extra application or two before cycling- but it's not going to make any difference in the brake system performance as I'm sure you know. I'd save my money.
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