Secondarys will not open...
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 3,347
Likes: 9
From: Salinas Ca.
Don -
Good work identifying the problem, tracking it down, and getting it resolved! I often receive carbs that have had "work" done to them that disables the secondary operation (both Holleys and Q-Jets), and the owners have operated the carbs/cars with inoperable secondaries for years without ever realizing it. Hope you have some fun with the car now!
Lars
Good work identifying the problem, tracking it down, and getting it resolved! I often receive carbs that have had "work" done to them that disables the secondary operation (both Holleys and Q-Jets), and the owners have operated the carbs/cars with inoperable secondaries for years without ever realizing it. Hope you have some fun with the car now!
Lars
btw: When I found this LT-1 back in 2005...she was mostly all correct except for the missing 6239 carb and AIR hardware. With this site...back in...ohhh, maybe 2007 did I find both missing parts "correct dates". This was before I found you and your tunning papers ect. Said that...I sent that 6239 to someone that restored it. I did install that carb on the car...which I could immidiatly tell it was not correct. ;( Due to "at the time" time constraints.... I purchased this Sreet Avanger from 'Summit which has been good all this time....well untill recently, which is good now!! I'm thinking now, after complety rebuilding this SA, I now have confidence to completely rebuild the 6239. Needless to say, I am very curious to hear/feel how Zora intended this LT-1 to breath! If I can not manage it....probably/hopefully be able to send it to you?
Cheers and fairwinds!!Here is how I tested the secondary's. Used a video camera.
Holley 770 Street Avenger vacuum secondaries operation
Holley 770 Street Avenger vacuum secondaries operation
Cheers!
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,094
Likes: 4,449
From: Marlton NJ
LT-1 ....with Air...Dang...Nice!
Ask Lars for his distributor tuning papers.
Send an email to: V8fastcars@msn.com.
Set it up that way and it will really roar!
The factory timing is pretty severely retarded, for emissions, in a few spots, especially low rpm, like 10*, and that really takes the edge off an LT-1.
I ran like 16* initial with 36* total at 2800rpm, with say 12* in the vac can.
Really helped it below 3500!!
Right where you drive it all the time.
Ask Lars for his distributor tuning papers.
Send an email to: V8fastcars@msn.com.
Set it up that way and it will really roar!
The factory timing is pretty severely retarded, for emissions, in a few spots, especially low rpm, like 10*, and that really takes the edge off an LT-1.
I ran like 16* initial with 36* total at 2800rpm, with say 12* in the vac can.
Really helped it below 3500!!
Right where you drive it all the time.
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 3,347
Likes: 9
From: Salinas Ca.
LT-1 ....with Air...Dang...Nice!
Ask Lars for his distributor tuning papers.
Send an email to: V8fastcars@msn.com.
Set it up that way and it will really roar!
The factory timing is pretty severely retarded, for emissions, in a few spots, especially low rpm, like 10*, and that really takes the edge off an LT-1.
I ran like 16* initial with 36* total at 2800rpm, with say 12* in the vac can.
Really helped it below 3500!!
Right where you drive it all the time.
Ask Lars for his distributor tuning papers.
Send an email to: V8fastcars@msn.com.
Set it up that way and it will really roar!
The factory timing is pretty severely retarded, for emissions, in a few spots, especially low rpm, like 10*, and that really takes the edge off an LT-1.
I ran like 16* initial with 36* total at 2800rpm, with say 12* in the vac can.
Really helped it below 3500!!
Right where you drive it all the time.
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
You might want to try running your distributor off of manifold vacuum rather than ported vacuum, as you are currently doing. Unless you're trying to pass an emissions test, the manifold vacuum will probably work out much better for you.
Lars
Lars
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 3,347
Likes: 9
From: Salinas Ca.
On that note....I have been hooked to ported vacume since restore.
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
Don -
Send me an e-mail request for my timing papers - these explain in great detail the difference and the reasons. Right now, you're set up to pass an emissions test, and not set up for performance or throttle response. All outlined and explained in my papers.
Lars
Send me an e-mail request for my timing papers - these explain in great detail the difference and the reasons. Right now, you're set up to pass an emissions test, and not set up for performance or throttle response. All outlined and explained in my papers.
Lars
