C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Fuel, Emission Control, and Exhaust Systems
Not Logged In! Login or Register!  Users Online: 18 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
Volunteer Vette Products
CorvetteClothing.com
VetteBookStore.com
Mid America Motorworks
Bair's Corvettes

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
NXL 427
wrencher52
Featured Links

Buy Now
Corvette Magazine - $19.99 for 8 issues
Corvette Magazine
Only $19.99 for 8 issues


How To Rebuild Corvette Rolling Chassis 1963-1982
How To Rebuild Corvette Rolling Chassis 1963-1982


Corvette by the Numbers
Corvette by the Numbers


Corvette 50th Anniversary
Corvette 50th Anniversary



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
9/15/17 3:26pm - Original Message: 'New Carb for my LT-1'
F4Gary Gold Member
Gold Member
- Send Private Message


Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 869
I've had it with this old original Holley.  Have been trying to stop a fuel leak and stripped the rear fuel inlet fitting.  I think I want to put this date coded carb in a box to stay with the car for the next owner, and buy a Holley Street Avenger to replace it.
Original carb is 780 cfm.  Street Avengers come in 670 and 770 cfm.  I'm thinking about going down to a 670 as I don't race this car and don't go above 5,000 rpm hardly ever.  In fact more like 4,500.

Talked to a Holley tech guy and he agreed and said I'd probably get better gas mileage to boot (not that I care).

I would go to an electric choke and block off the exhaust crossover to remove the heat under the carb (I've already removed the butterfly from the heat riser.

What do you guys think?
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
9/15/17 7:10pm - Reply: 'Re: New Carb for my LT-1'
gtr1999
Limited Member
- Send Private Message


Wallingford, CT - USA

Vette(s):
1969 350 4 spd drop top 1972 350 auto coupe

Joined: 5/2/2016
Posts: 55
I setup a street avenger 670 carb on my 72 when I built the motor 10 years ago. They come a little lean and sloppy built but with some jetting and adjustment it runs good. Not as good as an original tuned Q-Jet but not bad. My car ins not an LT1, just a warmed up base 350.
 Reply Reply  Quote Reply w/Quote
9/15/17 7:21pm - Reply: 'Re: New Carb for my LT-1'
F4Gary Gold Member
Gold Member
- Send Private Message


Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 869
What do you mean by sloppy?

____________________________________
 Reply Reply  Quote Reply w/Quote
9/16/17 7:01am - Reply: 'Re: New Carb for my LT-1'
manchestershark Lifetime Member
Lifetime Member
- Online Now!
- Send Private Message


Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1900
I also have a warmed up 350 in a 72' A holley never worked well for me. Doesn't mean they are not a good unit. I have a professionally rebushed and rebuilt Q-jet. Works VERY well in my opinion. Give one a try. It'll mean a intake change, but may be a good alternative.

____________________________________

Click on image for full view
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Fuel, Emission Control, and Exhaust Systems
(Moderator: Adam Wartell, Norsky, Adams' Apple, kstyer)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30