Question for 72 LT-1 Owners
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Question for 72 LT-1 Owners
I'm trying to confirm the carb hose routing from the charcoal canister and don't see the necessary level of detail in my Assembly Manual.
For the small hose that routes from the charcoal canister to the Holley carb, which vac port does it go to on the carb (location)? And which vac port is correct for the distributor advance? I think mine may be switched. Pics of the correct factory routing or scanned images from an assembly manual would be great if you have them.
BTW: 71 LT-1s should have the same routing, but I'm not sure about 70.
Thanks!
For the small hose that routes from the charcoal canister to the Holley carb, which vac port does it go to on the carb (location)? And which vac port is correct for the distributor advance? I think mine may be switched. Pics of the correct factory routing or scanned images from an assembly manual would be great if you have them.
BTW: 71 LT-1s should have the same routing, but I'm not sure about 70.
Thanks!
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
I have a 99% unmolested 36000 mile 72 LT1 with its original vacuum hoses still intact. In fact, the ONLY things that are not original to this car are the tires, battery, spark plugs and paint. Can I send you some digital photos of the vacuum lines?
Gary
Gary
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Originally Posted by GaryS
I have a 99% unmolested 36000 mile 72 LT1 with its original vacuum hoses still intact. In fact, the ONLY things that are not original to this car are the tires, battery, spark plugs and paint. Can I send you some digital photos of the vacuum lines?
Gary
Gary
<< Thanks very much Gary!
Last edited by SharkAttack; Jun 2, 2006 at 09:28 AM.
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
TTT - Still need assistance here and hoping someone can help. Need pics or graphics of the proper factory hose routing from (1) charcoal canister to carb and (2) distributor advance to carb for a 72 LT-1.
Thanks!
Thanks!
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Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
I had mine hooked up a nd working perfectly a few years ago. I have now modded the heck out of it and changed everything. I'll see if I can get any old pics or how I hooked them up. Do you have the vacuum selonoid on the intake for the vacuum advance?
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Originally Posted by Gordonm
I had mine hooked up a nd working perfectly a few years ago. I have now modded the heck out of it and changed everything. I'll see if I can get any old pics or how I hooked them up. Do you have the vacuum selonoid on the intake for the vacuum advance?
Last edited by SharkAttack; Jun 6, 2006 at 01:15 PM.
Melting Slicks
Joined: Mar 2006
Posts: 3,456
Likes: 102
From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
On my 73 the canister hose T-boned on the pcv valve. I bought a 90* PCV from 78 or later with the dual molded vacuum ports. Works like a champ and looks profressional.
Check the pic. The bottom hose on the pcv is from the carb, the top hose goes to the vapor can.
Check the pic. The bottom hose on the pcv is from the carb, the top hose goes to the vapor can.
Last edited by CheezMoe; Jun 5, 2006 at 11:02 PM.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Cannister line should be on PCV valve BUT on a "T" fitting (Engine photo in previous post is not a LT-1 judging buy the 73 and later L-82 aircleaner with the PCV/Cannister hokked up with a "F" type hose nipple.) Line goes in at drivers firewall side and comes out of "T" fitting into PCV port on RH side of the Holley. I hope this helps.
Melting Slicks
Joined: Mar 2006
Posts: 3,456
Likes: 102
From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
Cannister line should be on PCV valve BUT on a "T" fitting (Engine photo in previous post is not a LT-1 judging buy the 73 and later L-82 aircleaner with the PCV/Cannister hokked up with a "F" type hose nipple.) Line goes in at drivers firewall side and comes out of "T" fitting into PCV port on RH side of the Holley. I hope this helps.
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Originally Posted by Solid LT1
Cannister line should be on PCV valve BUT on a "T" fitting (Engine photo in previous post is not a LT-1 judging buy the 73 and later L-82 aircleaner with the PCV/Cannister hokked up with a "F" type hose nipple.) Line goes in at drivers firewall side and comes out of "T" fitting into PCV port on RH side of the Holley. I hope this helps.
Burning Brakes
Joined: Jan 2006
Posts: 1,152
Likes: 23
From: Kawartha Lakes and PEC, Ontario
Two things...1. I probably know less about engines than most and 2. My '72 LT-1 is a lot of things, but unmolested it is not. So fwiw... I always thought that little 'plug' on the end of the pcv valve was strange, but now that I read your post I'm guessing that it should be attached to the charcoal canister.
I couldn't get a decent pic of the canister, but I can tell you that there is a line attached to it that runs down to and along the frame. Then there are two fittings that have no hoses on them, one is larger than the other.
Here's a picture of that hose attaching to the carb...
I hope this helps.
Now I have a question? Does it matter that the charcoal canister in my car is obviously not hooked up? Why would someone disconnect it?
I couldn't get a decent pic of the canister, but I can tell you that there is a line attached to it that runs down to and along the frame. Then there are two fittings that have no hoses on them, one is larger than the other.
Here's a picture of that hose attaching to the carb...
I hope this helps.
Now I have a question? Does it matter that the charcoal canister in my car is obviously not hooked up? Why would someone disconnect it?
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
Originally Posted by Brooklinite
Two things...1. I probably know less about engines than most and 2. My '72 LT-1 is a lot of things, but unmolested it is not. So fwiw... I always thought that little 'plug' on the end of the pcv valve was strange, but now that I read your post I'm guessing that it should be attached to the charcoal canister.
I couldn't get a decent pic of the canister, but I can tell you that there is a line attached to it that runs down to and along the frame. Then there are two fittings that have no hoses on them, one is larger than the other.
Here's a picture of that hose attaching to the carb...
I hope this helps.
Now I have a question? Does it matter that the charcoal canister in my car is obviously not hooked up? Why would someone disconnect it?
I couldn't get a decent pic of the canister, but I can tell you that there is a line attached to it that runs down to and along the frame. Then there are two fittings that have no hoses on them, one is larger than the other.
Here's a picture of that hose attaching to the carb...
I hope this helps.
Now I have a question? Does it matter that the charcoal canister in my car is obviously not hooked up? Why would someone disconnect it?
Thread Starter
Safety Car
Joined: Apr 2001
Posts: 3,581
Likes: 28
From: Spring, Texas
FYI: The pic in this post is what I needed. It shows the hose routings to the carb for the distributor advance and for the smaller diameter hose on the charcoal canister.
http://forums.corvetteforum.com/show....php?t=1413556
http://forums.corvetteforum.com/show....php?t=1413556
Burning Brakes
Joined: Jan 2006
Posts: 1,152
Likes: 23
From: Kawartha Lakes and PEC, Ontario
Originally Posted by SharkAttack
FYI: The pic in this post is what I needed. It shows the hose routings to the carb for the distributor advance and for the smaller diameter hose on the charcoal canister.
http://forums.corvetteforum.com/show....php?t=1413556
http://forums.corvetteforum.com/show....php?t=1413556