Carb opinions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BLACK AND BLUE 67-72 · 09-30-2003, 01:34 PM

Is a 600cfm 1406 Eldebrock too big for a 350? What is usually stock for a 4-barrel, meaning cfms?

busterwivell · 09-30-2003, 01:47 PM

That should be fine

lewi · 09-30-2003, 02:03 PM

I put the same carb on mine and am very happy with the results. i know one of the guys at edlebrock and ask him to set me up with something that would work now and when I pump it up to 325-350 horses.

BLACK AND BLUE 67-72 · 09-30-2003, 02:08 PM

Does any of yours seem to run a little rich? Mine seems to at idle you can smell the raw gas smell, and I'm not sure on how to lean it out without hurting performance. I have not adjusted anything but the idle screw on it since it was new.

smokekiki · 09-30-2003, 02:28 PM

Check edelbrock's web site.I think they have instructions on how to adjust the fuel mixture.

BLACK AND BLUE 67-72 · 09-30-2003, 02:30 PM

Alright I'll look and see.

lukecp · 09-30-2003, 02:38 PM

For most stock 350's a 1406 is just fine....however for some it may be a little rich or lean. If it is, it is very easy to tune them by swapping metering rods.

The stock Q-jet is rated at 750cfm......i think 600 is perfect for a stock or mild 350.

BLACK AND BLUE 67-72 · 09-30-2003, 02:43 PM

Ok, cool thanks!

RON WOODGEARD · 09-30-2003, 03:49 PM

A 600 CFM is ideal for the small block, You can as described above, tune it up or down, The Edelbrock, or Carter is far better suited for the street then the Holley, There are rods that can be changed in about 5 minutes each, that will "tune" the fuel flow into the jets. Once you look at the rods you can get a pretty good understanding how they work. These rods can be replaced with taking nothing more off then the air cleaner and a very small plate like cover on the top of the carb. if you are running a little rich, put a rod in that is a little bigger then the one in now, ( resricting fuel flow a touch) If you need more flow, then put one in that is smaller then the one you take out.(allowing more fuel to flow) Remember, you have to change two rods. One on each side of the air throat inlet. The rods are tapered, And they have different tapers, so you can adjust the flow throughout the RPM, range. MUCH more user friendly then the holley configuration for tuning..

Ron

09-30-2003, 01:34 PM	#1
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Carb opinions Is a 600cfm 1406 Eldebrock too big for a 350? What is usually stock for a 4-barrel, meaning cfms? __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

09-30-2003, 01:47 PM	#2
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	That should be fine __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

09-30-2003, 02:03 PM	#3
lewi Registered User Join Date: Nov 2002 Location: Redding California Posts: 223	I put the same carb on mine and am very happy with the results. i know one of the guys at edlebrock and ask him to set me up with something that would work now and when I pump it up to 325-350 horses. __________________ 1971 Chevy Cheyenne 383/350 LWB 2wd Built to use, and look good.

09-30-2003, 02:08 PM	#4
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Does any of yours seem to run a little rich? Mine seems to at idle you can smell the raw gas smell, and I'm not sure on how to lean it out without hurting performance. I have not adjusted anything but the idle screw on it since it was new. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

09-30-2003, 02:28 PM	#5
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,474	Check edelbrock's web site.I think they have instructions on how to adjust the fuel mixture. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

09-30-2003, 02:30 PM	#6
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Alright I'll look and see. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

09-30-2003, 02:38 PM	#7
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	For most stock 350's a 1406 is just fine....however for some it may be a little rich or lean. If it is, it is very easy to tune them by swapping metering rods. The stock Q-jet is rated at 750cfm......i think 600 is perfect for a stock or mild 350. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

09-30-2003, 02:43 PM	#8
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Ok, cool thanks! __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

09-30-2003, 03:49 PM	#9
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	A 600 CFM is ideal for the small block, You can as described above, tune it up or down, The Edelbrock, or Carter is far better suited for the street then the Holley, There are rods that can be changed in about 5 minutes each, that will "tune" the fuel flow into the jets. Once you look at the rods you can get a pretty good understanding how they work. These rods can be replaced with taking nothing more off then the air cleaner and a very small plate like cover on the top of the carb. if you are running a little rich, put a rod in that is a little bigger then the one in now, ( resricting fuel flow a touch) If you need more flow, then put one in that is smaller then the one you take out.(allowing more fuel to flow) Remember, you have to change two rods. One on each side of the air throat inlet. The rods are tapered, And they have different tapers, so you can adjust the flow throughout the RPM, range. MUCH more user friendly then the holley configuration for tuning.. Ron



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.