The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-03-2008, 12:47 AM   #1
motornutz
Registered User
 
Join Date: Oct 2004
Location: michigan
Posts: 45
edelbrock 1407 rebuild or calibration questions

i have a 1407 edelbrock with an electric choke. it is too big (rich) for my 350. can i buy and recalibrate the carb with different jets and rods to lean it out some and make it work on my 350 or will it be hopeless with this carb. my engine is a stock 350 with a manual trans and 4.56 gears. its a stakebed truck that i use for pulling heavy loads. thanks
motornutz is offline   Reply With Quote
Old 11-03-2008, 12:58 AM   #2
Cyclone
Registered User
 
Cyclone's Avatar
 
Join Date: Oct 2004
Location: Sonoma, CA
Posts: 318
Re: edelbrock 1407 rebuild or calibration questions

We have had very good luck in tuning those carbs with the optional kit, they come w/great, easy to follow, tuning instructions.
Cyclone is offline   Reply With Quote
Old 11-03-2008, 10:40 AM   #3
67ChevyRedneck
Hittin E-Z Street on Mud Tires
 
67ChevyRedneck's Avatar
 
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
Re: edelbrock 1407 rebuild or calibration questions

Quote:
Originally Posted by Cyclone View Post
We have had very good luck in tuning those carbs with the optional kit, they come w/great, easy to follow, tuning instructions.
Thanks for that! My truck runs well, but I've been told it can run better with the tuning kit, maybe even get a little better fuel mileage.

Edit: oops, my carb is the 1406...
__________________
Jesse James
1967 C10 SWB Stepside: 350/700R4/3.73
1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc
1968 Pontiac Firebird: Project Fire Chicken!
2015 Silverado Double Cab 5.3L Z71
2001 Jeep Wrangler Sport 4.0L 5spd
2020 Chevrolet Equinox Premium 2.0L Turbo
2011 Mustang V6 ~ Wife's ride
American Born, Country by the Grace of God
1967 CST Shop Truck Rebuild!
My 1967 C-10 Build Thread
My Vintage Air A/C Install
Project "On a Dime"
Trying my hand at Home Renovation!
1965 Mustang Modifications!

Last edited by 67ChevyRedneck; 11-03-2008 at 12:17 PM.
67ChevyRedneck is offline   Reply With Quote
Old 11-03-2008, 11:44 AM   #4
piecesparts
Parts and more parts
 
piecesparts's Avatar
 
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
Re: edelbrock 1407 rebuild or calibration questions

I don't want to make you mad, BUT you will have problems making the 1407 (750 cfm) carb streetable. Don't get me wrong, if you are racing this motor then it is applicable, but streetable (NO). You are undoubtedly suffering from a stopllight slobber and bogging when you accelerate and the fuel mileqage just outright sux. (Am I worng?) The 750 will come into it's own right at about 2500 RPM and the accleration at that time will become really good. The top end on your engine is going to be higher there than if you had a smaller carb. What you will find is that you are putting a large amount of carbon and chemical waste on your valves and not gaining anything but pain in performance. Been there and done that---My Engine builder and I worked that one out.

You have a Stock 350 motor with a set of low gears, but you are not running at 2500 RPM or greater for the most part---especially around town. You are OVER CARBED for your application, especially a heavy truck, not a hot Camaro. I would look at a smaller CFM rating and then adjust the needles and jets to what you need. The 1406 models are a 600 CFM carb and the Thunder AVS models 1806 models are a 650 CFM carb. The most stock 350s will run in this area for carburetion. I am running a 1406 on my son's 350 with a cam (3.73 gears) and I have the Thunder AVS 650 on my stroker 383 motor (3.73) gears. Both of which run quite well and have no issue with bogging. There are calcualtions that work for this or you can use Edelbrocks recommendation for their carbs. http://www.edelbrock.com/automotive_...pp_chart.shtml
piecesparts is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:19 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com