67 holley replacement
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
67 holley replacement
Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim
Thanks
Nevadajim
Melting Slicks
Joined: Dec 2001
Posts: 2,213
Likes: 327
From: LI NY NY
Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim
Thanks
Nevadajim
Drifting
Joined: Dec 2015
Posts: 1,369
Likes: 140
I went with a Quickfuel street series 780 for the 427. A company out in the mid west will sell you your application and also customize it for your heads, cam, intake, compression ratio, transmission and gearing for the same price. All set up for ethanol based fuel. It comes with a build sheet and you just bolt it on and go. I barely had to tweak the idle speed and A/F mixture. I believe I paid $437.00 for it and I'm very happy with it.
RPM Performance 587-337-0472
RPM Performance 587-337-0472
Team Owner
Joined: Aug 2007
Posts: 58,061
Likes: 7,146
Army
I found out on here that QuickFuel sold out to Holley and customer service went in the toilet... The forum member that shared this went to Richmond, Va. and bought a different variant:
https://www.corvetteforum.com/forums...post1593640036
https://www.corvetteforum.com/forums...post1593640036
Melting Slicks
Joined: Apr 2002
Posts: 3,100
Likes: 2,355
From: Allison Park, PA
[QUOTE=nevadajim;1593755081]Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim[/QUOTE]
How "original" is your original carb??? Have you ever had it professionally rebuilt? I had mine professionally rebuilt last winter by the only guy that JohnZ recommends - and it has run great since I installed it back on my car. Send it to http://vintagemusclecarparts.com/:
Tom
Thanks
Nevadajim[/QUOTE]
How "original" is your original carb??? Have you ever had it professionally rebuilt? I had mine professionally rebuilt last winter by the only guy that JohnZ recommends - and it has run great since I installed it back on my car. Send it to http://vintagemusclecarparts.com/:
Tom
Drifting
Joined: Dec 2015
Posts: 1,369
Likes: 140
I found out on here that QuickFuel sold out to Holley and customer service went in the toilet... The forum member that shared this went to Richmond, Va. and bought a different variant:
https://www.corvetteforum.com/forums...post1593640036
https://www.corvetteforum.com/forums...post1593640036
Last edited by ILBMF; Dec 29, 2016 at 05:35 PM.
Drifting
Joined: Jul 2014
Posts: 1,555
Likes: 791
From: Massachusetts
Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim
Thanks
Nevadajim
For about the same cost as a professional rebuild, you can simply buy a brand new Holley. Options include a reproduction of the 3310(?) that came on the '67, or a newer Street Avenger carb. If you decide to buy a new carb, keep in mind that the Street Avenger will have a different fuel inlet and an electric choke. So, some minor adaptation will be required.
If you decide to buy a replacement carb, I suggest sticking with something close to the 585 CFM of the original carb. A big carb such as a 780 would likely degrade the throttle response.
Lastly, if you only drive the car every 1-2 years, you need to be concerned with the gas going bad. Adding a fuel stabilizer might be a good idea if the car is going to sit that long.
Safety Car
Joined: May 2014
Posts: 3,784
Likes: 656
The original Holley can be repaired to work very well, the function of the carburetor internals is the same as a modern day carburetor, but I agree that they can be very frustrating when the surfaces are not sealing tight. I hate to see you give up on it but when compared to the cost of a new better made carburetor I can't argue the point.
The Holley main body and metering blocks are made from cheap metal IMO. The new carburetors have aluminum main bodies and metering blocks that seal better plus threaded air bleeds and jets for tuning. Once a experienced carburetor shop knows the specs for a engine the carburetor can be set up to run very well right out of the box just like the original carbs ran when new.
The Holley main body and metering blocks are made from cheap metal IMO. The new carburetors have aluminum main bodies and metering blocks that seal better plus threaded air bleeds and jets for tuning. Once a experienced carburetor shop knows the specs for a engine the carburetor can be set up to run very well right out of the box just like the original carbs ran when new.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
[QUOTE=nevadajim;1593755081]Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim
Thanks
Nevadajim
Tom[/QUOTE]
It is the original carb - have owned the Vette since 1978 and have replaced bowl and metering gaskets many times over the years.
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
Some of the issues you mention (such as leaks) can be fixed by having the carb rebuilt by a reputable rebuilder. Another thing that is helpful with the '67 327/300 is to block off the "hot slot" under the primary side, as shown in the attached photo. The plugs in the photo are threaded pipe plugs, but other people have used simple drive-in plugs that resemble freeze plugs. The idea is to reduce the heating under the carb primary.
For about the same cost as a professional rebuild, you can simply buy a brand new Holley. Options include a reproduction of the 3310(?) that came on the '67, or a newer Street Avenger carb. If you decide to buy a new carb, keep in mind that the Street Avenger will have a different fuel inlet and an electric choke. So, some minor adaptation will be required.
If you decide to buy a replacement carb, I suggest sticking with something close to the 585 CFM of the original carb. A big carb such as a 780 would likely degrade the throttle response.
Lastly, if you only drive the car every 1-2 years, you need to be concerned with the gas going bad. Adding a fuel stabilizer might be a good idea if the car is going to sit that long.
For about the same cost as a professional rebuild, you can simply buy a brand new Holley. Options include a reproduction of the 3310(?) that came on the '67, or a newer Street Avenger carb. If you decide to buy a new carb, keep in mind that the Street Avenger will have a different fuel inlet and an electric choke. So, some minor adaptation will be required.
If you decide to buy a replacement carb, I suggest sticking with something close to the 585 CFM of the original carb. A big carb such as a 780 would likely degrade the throttle response.
Lastly, if you only drive the car every 1-2 years, you need to be concerned with the gas going bad. Adding a fuel stabilizer might be a good idea if the car is going to sit that long.
Last edited by nevadajim; Dec 30, 2016 at 11:36 AM.
Race Director
Joined: May 2006
Posts: 18,737
Likes: 2,583
when you replaced the metering block and bowl gaskets, did you use the blue colored gaskets?
after a few uses after replacing the gaskets, do you recheck the bowl screws to make sure they are not loose from gasket compression?
after a few uses after replacing the gaskets, do you recheck the bowl screws to make sure they are not loose from gasket compression?
Le Mans Master
Joined: Feb 2014
Posts: 8,932
Likes: 5,476
From: Richardson Texas
Nevada,
I purchased and installed this new Holley two years ago and she purrs like a kitten. Ready to go right out of the box...plug and play.
http://www.specialtypartsdirect.com/...7ci-_p_24.html
I purchased and installed this new Holley two years ago and she purrs like a kitten. Ready to go right out of the box...plug and play.
http://www.specialtypartsdirect.com/...7ci-_p_24.html
Drifting
Joined: Jul 2014
Posts: 1,555
Likes: 791
From: Massachusetts
I think the problem with fuel boiling is because modern fuels have a lower boiling point than the gas we had in the 1960s. It's just something we have to deal with.
BTW, if you decide to block the hot slot, check the archives for some postings from John Hinckley with photos and a description of the plugs he used. I used threaded pipe plus because the intake was off the car and I could clean out the metal chips from threading the holes. John used a press-in plug that might be better if the intake remains on the car.
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
Nevada,
I purchased and installed this new Holley two years ago and she purrs like a kitten. Ready to go right out of the box...plug and play.
http://www.specialtypartsdirect.com/...7ci-_p_24.html
I purchased and installed this new Holley two years ago and she purrs like a kitten. Ready to go right out of the box...plug and play.
http://www.specialtypartsdirect.com/...7ci-_p_24.html
Drifting
Joined: Jul 2014
Posts: 1,555
Likes: 791
From: Massachusetts
The same carb is used for both manual and Powerglide. The throttle lever provisions are all there for the kick-down linkage, but they are not used on manual transmission cars.
Racer
Joined: Sep 2004
Posts: 473
Likes: 25
From: La Quinta CA
Fed up with the original holley carb. on my 67 300hp auto. Very limited driving and the car might set for 1 to 2 years. Also the heat build up and bowl leakage is more than I want to put up with. Other than edelbrock what other company makes a replacement carb for my car?
Thanks
Nevadajim
Thanks
Nevadajim
Bob
Thread Starter
7th Gear
Joined: Dec 2016
Posts: 7
Likes: 0
I have the same car as yours and I decided to change out the original, date coded Holley as it continued to develop minor leaks, and I was constantly adjusting idle mixture to improve idle quality. I decided to replace it with a Holley 83570 Street Avenger carb. I blocked the heat slot holes in the intake manifold, and also added a Holley 108-70 heat shield under the carburetor. This car sits for long periods of time, but we drive it on long road trips each year. Last fall was 4900 miles at altitudes from sea level to over 9000 feet, with no need to adjust idle mixture during the entire trip. The car ran flawlessly for the entire trip. While it is sitting, I fill the tank with avgas 101 low lead fuel which will not gum up the carb. In the 25000 miles we've driven since I installed that carb, I have only needed to tighten mounting screws (all of them) once. Hope that helps your decision!
Bob
Bob
Good info.
My car is also sunfire yellow.
Jim