edelbrock carb questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rebelracer79 · 11-09-2005, 05:58 PM

Hey guys, i just put an edelbrock 600 cfm electric choke carb on my 71 chevy 1/2.

the problem is, it just seems like it isn't enough carb, the carb is all factory, never been torn apart, only a year old. What can I do to this carb to make it feed the truck better?

thanks, Kyle

CPNEJR · 11-09-2005, 06:09 PM

Now i'm no expert so don't trust me on this but i think that you could mess around with the jetting

Mixup · 11-09-2005, 07:07 PM

I had the same problem. The 600 cfm 1406 electric choke is an emissions carb. The 600cfm 1405 manual choke is a performance carb and is jetted richer. I have the 1406 and can't get it jetted rich enough even with the kit.

dwaite72lnghrn · 11-09-2005, 07:52 PM

My thought is they come out of the box to RICH!. A 1406 on a stock 350 will run rich and foul plugs, black smoke till it is leaned out a bit. A 1411 on a BB(402 and 502) does the same thing till it is leaned out a bit. They really like fuel, and when the secondaries kick in they are flat- no real jump from the box. My next step is a AF indicater to see exactly how it is running. JMHO

Stroker · 11-09-2005, 11:18 PM

Quote:

Originally Posted by dwaite72lnghrn

My thought is they come out of the box to RICH!. A 1406 on a stock 350 will run rich and foul plugs, black smoke till it is leaned out a bit. A 1411 on a BB(402 and 502) does the same thing till it is leaned out a bit. They really like fuel, and when the secondaries kick in they are flat- no real jump from the box. My next step is a AF indicater to see exactly how it is running. JMHO

I agree, on a stock 350 the otb 1406 jetting is a bit on the rich side. I have a AF indicator on my 68 and the stock 1406 calibrations where very good with my mildly modified 350. 9.0 to comp, PP 882 heads, Crane 266 cam, headers and Chevy high rise duel plane intake.

larry may · 11-09-2005, 08:04 PM

I too have one of the Eldebrock carbs. Barff . Putting Q jet back on......

blazerparts · 11-10-2005, 11:24 AM

Not to mug the thread, but I have otb 1406's on both my stock (I believe) engines and they are both rich at this elevation (5000'). Any recommendations on a jetting upgrade? Also, how important is fuel pressure?

Bill72BB · 11-10-2005, 11:32 AM

I have run both a 1406 ,and 1411 and neverr had any problem's .
The Edelbrock will not give us the Kick in the pants the Q-jet will when we stomp it the Q-jet secondary's are massive .
Here is a link to jetting the 1406 .

Blazerparts ; Also, how important is fuel pressure?
The Edelbrock recommends you keep fuel pressure below 5psi ( this is from memory check their site to be sure )

http://www.edelbrock.com/automotive/eps_1406.html

67chevemall · 11-10-2005, 04:35 PM

I've tried the Holley's and qjets and now I just bought a 1406
so in the spring when I put it on I'll cross my fingers.
As of now I like the Holleys...

chevybill · 11-10-2005, 06:45 PM

i just ordered a 1405 for a 98 vortec engine, i am in mississippi. do you guys think i will need to change jets? engine will have a msd ignition and most likely headers, but otherwise stock and edelbrock 2116 intake

Cat Fuzz · 11-10-2005, 09:19 PM

You almost always have to rejet those carbs to get em just right. You also may have to adjust the accelerator pump stroke and those little springs that control when the metering rods come up for the secondaries. Once you get it dialed in, it won't give you any trouble for years. I've had my Carter AFB for 12 years now and all I have to do is douche it with carb cleaner every so often.

11-09-2005, 05:58 PM	#1
rebelracer79 Registered User Join Date: Oct 2005 Location: Chouteau, OK Posts: 9	edelbrock carb questions Hey guys, i just put an edelbrock 600 cfm electric choke carb on my 71 chevy 1/2. the problem is, it just seems like it isn't enough carb, the carb is all factory, never been torn apart, only a year old. What can I do to this carb to make it feed the truck better? thanks, Kyle

11-09-2005, 06:09 PM	#2
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: edelbrock carb questions Now i'm no expert so don't trust me on this but i think that you could mess around with the jetting __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

11-09-2005, 07:07 PM	#3
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	Re: edelbrock carb questions I had the same problem. The 600 cfm 1406 electric choke is an emissions carb. The 600cfm 1405 manual choke is a performance carb and is jetted richer. I have the 1406 and can't get it jetted rich enough even with the kit. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

11-09-2005, 07:52 PM	#4
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Re: edelbrock carb questions My thought is they come out of the box to RICH!. A 1406 on a stock 350 will run rich and foul plugs, black smoke till it is leaned out a bit. A 1411 on a BB(402 and 502) does the same thing till it is leaned out a bit. They really like fuel, and when the secondaries kick in they are flat- no real jump from the box. My next step is a AF indicater to see exactly how it is running. JMHO __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

11-09-2005, 08:04 PM	#6
larry may Senior Member Join Date: Jul 2005 Location: MISSOURI Posts: 3,256	Re: edelbrock carb questions I too have one of the Eldebrock carbs. Barff . Putting Q jet back on......

11-10-2005, 11:24 AM	#7
blazerparts No,I DON'T have Tourett's Join Date: Mar 2005 Location: Reno, NV Posts: 556	Re: edelbrock carb questions Not to mug the thread, but I have otb 1406's on both my stock (I believe) engines and they are both rich at this elevation (5000'). Any recommendations on a jetting upgrade? Also, how important is fuel pressure? __________________ '72 K5 CST 350/350 Daily Driver '69 GMC3500 Camper Special CST Flatbed 396/400 Upgraded to show truck '69 GMC 2500 L6292, 3spd beater

11-10-2005, 11:32 AM	#8
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	Re: edelbrock carb questions I have run both a 1406 ,and 1411 and neverr had any problem's . The Edelbrock will not give us the Kick in the pants the Q-jet will when we stomp it the Q-jet secondary's are massive . Here is a link to jetting the 1406 . Blazerparts ; Also, how important is fuel pressure? The Edelbrock recommends you keep fuel pressure below 5psi ( this is from memory check their site to be sure ) http://www.edelbrock.com/automotive/eps_1406.html __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen , Last edited by Bill72BB; 11-10-2005 at 11:34 AM.

11-10-2005, 04:35 PM	#9
67chevemall Registered User Join Date: Apr 2003 Location: NB Posts: 3,367	Re: edelbrock carb questions I've tried the Holley's and qjets and now I just bought a 1406 so in the spring when I put it on I'll cross my fingers. As of now I like the Holleys... __________________ 1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD

11-10-2005, 06:45 PM	#10
chevybill Senior Member Join Date: Oct 2004 Location: calhoun city ms Posts: 940	Re: edelbrock carb questions i just ordered a 1405 for a 98 vortec engine, i am in mississippi. do you guys think i will need to change jets? engine will have a msd ignition and most likely headers, but otherwise stock and edelbrock 2116 intake __________________ ongoing 1970 c 10 lwb 1994 z-28 few mods.-owned since new 1978 vette silver/grey 25th anniv. paint Last edited by chevybill; 11-10-2005 at 09:35 PM.

11-10-2005, 09:19 PM	#11
Cat Fuzz My son, my joy. Join Date: Sep 2003 Location: Spokane WA Posts: 463	Re: edelbrock carb questions You almost always have to rejet those carbs to get em just right. You also may have to adjust the accelerator pump stroke and those little springs that control when the metering rods come up for the secondaries. Once you get it dialed in, it won't give you any trouble for years. I've had my Carter AFB for 12 years now and all I have to do is douche it with carb cleaner every so often. __________________ '69 Chevy 3/4 ton, 327cid, Carter AFB, Edelbrock intake, HEI, TH400. Founding member of the No Money To Spend On My Truck Club. When your at Home Depot, you WISH you had gotten an 8 foot bed!



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