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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-01-2004, 09:57 PM   #1
Jonboy
Slots go on anything!
 
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
need Edelbrock tuning help

How do you establish the base tune on an Edelbrock 1406? I thought it was closing the two screws at the bottom, then opening them until it runs rough? Mine still has a really rough idle, like it has a HUGE cam. I highly doubt it, and my mileage sucks as well. Please help!
__________________
1974 Jimmy- 5.3/4L80e/NP241
Jonboy is offline   Reply With Quote
Old 08-01-2004, 10:40 PM   #2
gchemist
BAD BOW-Silverado XST
 
gchemist's Avatar
 
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
Go buy a vacuum then read this web page.
http://www.centuryperformance.com/vacuum.asp
__________________
Gerardo a.k.a. Mad Chemist
Silverado XST videos
gchemist is offline   Reply With Quote
Old 08-01-2004, 10:42 PM   #3
gchemist
BAD BOW-Silverado XST
 
gchemist's Avatar
 
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
One more web page.
http://www.bob2000.com/carb.htm
__________________
Gerardo a.k.a. Mad Chemist
Silverado XST videos
gchemist is offline   Reply With Quote
Old 08-01-2004, 10:45 PM   #4
ocbaud
Garage Queen Material
 
Join Date: Oct 2002
Location: USA
Posts: 4,129
mine still runs rough at idle with my carb.........

ocbaud is offline   Reply With Quote
Old 08-01-2004, 11:25 PM   #5
DivineFord
My Name Is Mudd
 
DivineFord's Avatar
 
Join Date: Feb 2004
Location: Bangor, Maine
Posts: 101
I have a 1406 on my 305, and when it's all warmed up it idles very smooth. Sometimes something in it sticks and it idles a bit rough, but a few runs at full throttle usually gets everything back in order. I set mine by turning both screws all the way in and then both out a turn and a half. I then started it and adjusted ther idle screw(at the linkage for the throttle) for a proper idle speed. This has worked pretty well, but I have taken the screws another quarter to half a turn out trying to get it right. I did all the adjustments with the engine warmed up. This helped my truck so you could try it yoo. Count how many turns your screws go in just so you can put them back if you have problems with my method. Just keep trying different adjustments as long as thing improve. Don't forget to check your timing after you adjust

matt
DivineFord is offline   Reply With Quote
Old 08-02-2004, 08:13 PM   #6
screwballl
Tonawanda 454
 
screwballl's Avatar
 
Join Date: Mar 2004
Location: Liquid Sunshine State
Posts: 2,755
i am planning on getting a 750 cfm performer rebuild and seems that it is fairly easy to just swap it out without too many problems... i know at summit.com they have adjustment springs for all their carbs.
__________________
91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!!
04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011)
In the past 30 years about 90% of Fords are still on the road, the other 10% made it home.
-------------------
screwballl is offline   Reply With Quote
Old 08-02-2004, 09:26 PM   #7
cliffsta
Stepsides RULE
 
cliffsta's Avatar
 
Join Date: Jul 2004
Location: Pineville, LA
Posts: 1,921
what about just a straight up swap? im replacing my OE 2 barrel on my 305 with another 2 barrel 305 replacement, probably a Champion. How hard is it to do this?
__________________
1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD
1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD
1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD
2009 Kawasaki KLX-250S too many mods for this signature
1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake
Cardomain of the Accord
cliffsta is offline   Reply With Quote
Reply

Bookmarks


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 03:22 PM.


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