Vacuum Reservoir Tank Delete Question
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
Vacuum Reservoir Tank Delete Question
Hey guys, while I have my hood off and radiator out for a top end rebuild on my engine, I decided I would do the vacuum reservoir tank delete to save 50 lbs (heard of it from BeeJay's weight loss threads) off the front end.
How do I route the 3 vacuum lines that run into the vacuum tank once it's out? I've heard of people getting their vacuum from the manifold, and I've heard of people just using a "T" fitting and connecting the lines together, but that doesn't really make sense to me.
Anybody know?
How do I route the 3 vacuum lines that run into the vacuum tank once it's out? I've heard of people getting their vacuum from the manifold, and I've heard of people just using a "T" fitting and connecting the lines together, but that doesn't really make sense to me.
Anybody know?
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Just T them together.
Find a T and connect the two yellow hoses circled with a 1, to the black hose circled with a 2.
Find a T and connect the two yellow hoses circled with a 1, to the black hose circled with a 2.
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
Thanks, that was exactly what I was looking for!
Also, I saw mention of cutting the brackets off of the vacuum tank and re-using them so that the structural integrity isn't compromised. Any idea how that's done? IT appears that they all tie into the vacuum tank, so I imagine I would need to source some aluminum bar stock or something to make a cross member for the brackets to bolt to.
Also, I saw mention of cutting the brackets off of the vacuum tank and re-using them so that the structural integrity isn't compromised. Any idea how that's done? IT appears that they all tie into the vacuum tank, so I imagine I would need to source some aluminum bar stock or something to make a cross member for the brackets to bolt to.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
So, that begs the question if the vacuum tank could/should be by passed?
I have two new relays from my 82 enroute and thinking I should skip the vacuum can all together and go straight to the relays?
I'm not worried about having stored vacuum for popping lights up or down after the engine is off
I have two new relays from my 82 enroute and thinking I should skip the vacuum can all together and go straight to the relays?
I'm not worried about having stored vacuum for popping lights up or down after the engine is off
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
So, that begs the question if the vacuum tank could/should be by passed?
I have two new relays from my 82 enroute and thinking I should skip the vacuum can all together and go straight to the relays?
I'm not worried about having stored vacuum for popping lights up or down after the engine is off
I have two new relays from my 82 enroute and thinking I should skip the vacuum can all together and go straight to the relays?
I'm not worried about having stored vacuum for popping lights up or down after the engine is off
IMHO,
Willcox
Melting Slicks
Joined: Sep 2007
Posts: 2,149
Likes: 284
From: cary Il
I have deleted the tank in 68-72 cars, and the system works much
better and faster than with the tank, the only difference is you can't
open the headlights with the light switch when the car is not running
theres no reservoir of vaccume .
better and faster than with the tank, the only difference is you can't
open the headlights with the light switch when the car is not running
theres no reservoir of vaccume .
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Last edited by BBCorv70; Aug 27, 2016 at 08:01 PM.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I bought my '72 in '95 and it had a vacuum tank that looked like a miniature gas tank, it had cracked/splits in the side of the unit in several spots....I tossed it out......car ran for a few years, until the headlights got wiped out by a deer in '98......
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Racer
Joined: Mar 2012
Posts: 476
Likes: 37
From: Lynnwood WA
I was going to remove my vacuum tank and replace it with a small one from Summit. But when I looked at the cars weight distribution it showed F/R 47/53. That tank is 50lbs and it is as far forward as it could be. My 79 has a 24 gallon gas tank. With my old tires and the tank full it was just a little rear end happy.
At one point I had aluminum heads, intake, Dewitt's radiator, a Borgeson steering box, all the smog stuff removed and tube headers. In the rain (Seattle) the car would under steer, if you let off the gas or hit the breaks to transfer weight to the front, the car immediately started to over steer.
New tires and cast iron heads seem to have cleared this up. We will see this winter. I would still like to lighten the car but balance is important also. Just saying.
At one point I had aluminum heads, intake, Dewitt's radiator, a Borgeson steering box, all the smog stuff removed and tube headers. In the rain (Seattle) the car would under steer, if you let off the gas or hit the breaks to transfer weight to the front, the car immediately started to over steer. New tires and cast iron heads seem to have cleared this up. We will see this winter. I would still like to lighten the car but balance is important also. Just saying.
Instructor
Joined: Nov 2015
Posts: 195
Likes: 22
From: Ellenton, Florida
Vacuum reservior tank
I have a 1978 Pace Car and would like to remove the vacuum reservoir tank on the front of the car but if I do this will it compromise the strength and support for the front at all? Also, how difficult is it to remove? I know that I can just "T" the three vacuum lines together. Thanks in advance for any input on this.
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
I have a 1978 Pace Car and would like to remove the vacuum reservoir tank on the front of the car but if I do this will it compromise the strength and support for the front at all? Also, how difficult is it to remove? I know that I can just "T" the three vacuum lines together. Thanks in advance for any input on this.
I'm still trying to figure out how BeeJay tied his front end together. He mentions cutting the brackets off of the Vacuum tank to tie the front bumper support to the rad support, but I have yet to find a photo of this. The photo on Page 2 of this thread ( https://www.corvetteforum.com/forums...he-73-a-2.html ) shows how one person did it, but they removed everything and kept no front end support. I'm not really interested in doing that.
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
I was going to remove my vacuum tank and replace it with a small one from Summit. But when I looked at the cars weight distribution it showed F/R 47/53. That tank is 50lbs and it is as far forward as it could be. My 79 has a 24 gallon gas tank. With my old tires and the tank full it was just a little rear end happy. At one point I had aluminum heads, intake, Dewitt's radiator, a Borgeson steering box, all the smog stuff removed and tube headers. In the rain (Seattle) the car would under steer, if you let off the gas or hit the breaks to transfer weight to the front, the car immediately started to over steer. New tires and cast iron heads seem to have cleared this up. We will see this winter. I would still like to lighten the car but balance is important also. Just saying.
At one point I had aluminum heads, intake, Dewitt's radiator, a Borgeson steering box, all the smog stuff removed and tube headers. In the rain (Seattle) the car would under steer, if you let off the gas or hit the breaks to transfer weight to the front, the car immediately started to over steer. New tires and cast iron heads seem to have cleared this up. We will see this winter. I would still like to lighten the car but balance is important also. Just saying.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Our SBC vettes are nose heavy the BBC are horrible. I've taken maybe 400 pounds off the front end and it really holds the road. The cure for understeer, tail happy vettes is rear weight bias and wide modern ultra performance rear tires.