Vacuum stuff
Thread Starter
Burning Brakes
Joined: Jun 1999
Posts: 751
Likes: 0
From: Chandler AZ
St. Jude Contributor
Vacuum stuff
1. On the distributer there is a vacuum solinoid...my line is disconected where does this go and how does this work?
2. What type of vacuum do I need at a minimum to operate all the vacuum gear?
3. My head lights work ok when my wiper door is open and the wiper switch is on....anyone solve this mystery of life yet?
4. Anyone have a clear document that shows the wiring for the wiper mortor?
2. What type of vacuum do I need at a minimum to operate all the vacuum gear?
3. My head lights work ok when my wiper door is open and the wiper switch is on....anyone solve this mystery of life yet?
4. Anyone have a clear document that shows the wiring for the wiper mortor?
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Re: Vacuum stuff (71LS5)
Hi 71LS5:
I'm your neighbor Silvr77 in Wildwood.
#1 The vaccum line from the distributor should go to a designated vac advance source on the carb.
#2 Depending on which cam you have, vacuum will vary. I think the ideal range to run all accessories is around 12-18. (if I remember correctly)
#3 I have a wirering diagram for a 77. If it's the same for a 71, I can email it to you, or drop by with that monster of yours... I'd love to see it!! Let me know what you want via email.
Eddie
I'm your neighbor Silvr77 in Wildwood.
#1 The vaccum line from the distributor should go to a designated vac advance source on the carb.
#2 Depending on which cam you have, vacuum will vary. I think the ideal range to run all accessories is around 12-18. (if I remember correctly)
#3 I have a wirering diagram for a 77. If it's the same for a 71, I can email it to you, or drop by with that monster of yours... I'd love to see it!! Let me know what you want via email.
Eddie
Le Mans Master
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Vacuum stuff (Silvr77)
http://store6.yimg.com/I/zipproducts_1683_14402087
This link will take you to a generic diagram from Zip corvette. I wonder if this is one of the Dr. rebuild diagrams?? I used this diagram to help trouble shoot my vacuum system.
Mark B.
This link will take you to a generic diagram from Zip corvette. I wonder if this is one of the Dr. rebuild diagrams?? I used this diagram to help trouble shoot my vacuum system.
Mark B.
Pro
Joined: Aug 2001
Posts: 667
Likes: 3
From: College Station TX
Re: Vacuum stuff (71LS5)
Hey 71LS5 - I'm your neighbor from Grayslake.
1. I too have an LS5 ( '72 ). The vacumm advance line goes from the front upper right of the carb ( ported ) to a solinoid then to the vacumm advance. I will take a pic if you need one.
2. Minimum vacuum ??? My car - fairly stock - runs 19 in. mg. You can have less depending on health of motor and cam. I'm not sure if there is a lower limit, but I'd guess 10 - 12 in. mg. would be about the minumum.
3. You have a vacuum leak. I just got all the tools and a troubleshoting guide because I'm going through mine now. It is actually pretty straight forward, but you gotta understand what all the pieces do and be very methododical. Perhap we could tag team yours and mine. 2 heads are better than one.
4. I have the service manual for my '72. I'd bet they are the same
[Modified by sray454, 8:34 AM 6/5/2002]
[Modified by sray454, 8:34 AM 6/5/2002]
1. I too have an LS5 ( '72 ). The vacumm advance line goes from the front upper right of the carb ( ported ) to a solinoid then to the vacumm advance. I will take a pic if you need one.
2. Minimum vacuum ??? My car - fairly stock - runs 19 in. mg. You can have less depending on health of motor and cam. I'm not sure if there is a lower limit, but I'd guess 10 - 12 in. mg. would be about the minumum.
3. You have a vacuum leak. I just got all the tools and a troubleshoting guide because I'm going through mine now. It is actually pretty straight forward, but you gotta understand what all the pieces do and be very methododical. Perhap we could tag team yours and mine. 2 heads are better than one.
4. I have the service manual for my '72. I'd bet they are the same
[Modified by sray454, 8:34 AM 6/5/2002]
[Modified by sray454, 8:34 AM 6/5/2002]
Thread Starter
Burning Brakes
Joined: Jun 1999
Posts: 751
Likes: 0
From: Chandler AZ
St. Jude Contributor
Re: Vacuum stuff (sray454)
Hey the guys thanks for the info! Well Sray454/silver77 lets get together for a few beers and see eachothers projects! We can meet at my place and I can invite my neibor as he has a C3 and doing a 383 rebuild right next door. Even though most of my work is allmost complete these old cars allways need something. and with respect to the vacuum system I think two heads would be better than one as well. So with that maybe we can get stuff done while we shoot the shxt huh? We are all very close and now have a place. I live off Atkinson Rd in the town homes across from the new Cherry Creek. What do you guys think?
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Vacuum stuff (71LS5)
One area to look at when chasing a vacuum leak is the accessories. I had a line unplugged under my center consule. After plugging it I gained a pound or two of vac and I am sure it helped in allowing me to tune my car.
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: Vacuum stuff (Fevre)
I think i had about 7 diffrent vacuum leaks when i bought the car.One of the biggest leaks were in the relays to the headlights..I built my own vacuum pump out of a old bicycle pump and connected a good vacuum meter.Then it was just pump and listen where it hissed..Now i got a completely tight system...As a fellow forum member said ,its all pretty straight forward if you take your time.. :smash: :smash:
Pro
Joined: Aug 2001
Posts: 667
Likes: 3
From: College Station TX
Re: Vacuum stuff (71LS5)
Hey the guys thanks for the info! Well Sray454/silver77 lets get together for a few beers and see eachothers projects! We can meet at my place and I can invite my neibor as he has a C3 and doing a 383 rebuild right next door. Even though most of my work is allmost complete these old cars allways need something. and with respect to the vacuum system I think two heads would be better than one as well. So with that maybe we can get stuff done while we shoot the shxt huh? We are all very close and now have a place. I live off Atkinson Rd in the town homes across from the new Cherry Creek. What do you guys think?
=============
Sounds good to me ... let me know when and where ...
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Sounds good to me ... let me know when and where ...
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