What carburetor do you use? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MACO · 12-01-2005, 02:41 AM

Running a Edelbrock #1406 600 cfm carb on my tired old 350 with stock intake and a adaptor plate for the carb. 10mpg mostly in the city stop and go traffic short trips. I have leaned this carb way out from the base setting and the engine runs great but the mpg did not go up that much. One thing about the Edelbrock carb is it is shure easy to adjust and the jets and needles are cheap. I would like to replace the intake with a proper matching intake and recheck my mileage.

gator2511 · 12-01-2005, 10:28 AM

Edelbrock 1406. Simple to work on. I tried to lean it out some but gas mileage did not go up and performance went down. Getting 12-13mpg in town with 3.73 gears. Gear vendors doesn't help in town but really helps on the interstate. Havent checked the mileage but used to use 1/2 tank to get to hunt camp and now use 1/4.

jku72 · 12-01-2005, 10:37 AM

On the burb, Q-jet, 3.07 rear, 18 mpg.

GMan69 · 12-01-2005, 11:29 AM

Running an Edelbrock 1406 for now. MPG around 13 with THM 400 and 3.73 gears

Bill72BB · 12-01-2005, 12:58 PM

Edelbrock 1411 , rich out of the box ,Afraid to check milage .

rodstored-72 · 12-01-2005, 03:28 PM

A HOLLEY 600 with a 383 425hp(dynoed) sbc, 700r4 & 3:73 out back. don't know the mi. - haven't driven ... yet!!

Buckman · 12-01-2005, 04:00 PM

68stepbed, I just had a new 355 engine built with a 700r4 and in the first tank of gas I got about 14.5 mpg. I have a 650 double pump holley. I was hoping to get at lease 16 or better. I think my problem is that the carb is to rich and that the 3.07 rear gears are to high. The engine is lugging when it goes in OD. I believe I need 3.42 gears.

72MARIO · 12-01-2005, 07:33 PM

I have found with the 84 I get better millage when in 3rd not 4th I have a cam that works up wards of 3000rpm and a 31" tire combined with 3:45's drag me down below 2000rpm causing the luggiing. Bad combo =bad millage.
Oh and it's a 1406 600cfm the elc choke F ing sucks up here in Canada. Get a manual choke if you live in a climate that has fluxuating temps. under 13 all the time. I have spent over $200 in gas in 5 days.

67 has a 650 speed demon 12mpg

DangerBoy · 12-01-2005, 08:48 PM

In my 68 shortbed im runnin a 650 cfm edelbrock performer on my 355 and 3.42 gears with a TH-350 and 27" tires. I pull off 16 on the freeway and about 10 drivin around town.

Steelawork'n · 12-01-2005, 09:19 PM

Quote:

Originally Posted by Buckman

Which carburetor and the size do you ues and the fuel mileage do you get with it?

I use a Holley 600cfm on a Camaro intake with manual choke and vacuum secondaries. I get 10 to 14 mpg depending on how heavy I drive. Never less than 10 though. Running the big 4 speed with 4.10 in the rear and 235.85.16's.

68Stepbed · 12-01-2005, 11:05 PM

Quote:

Originally Posted by Buckman

68stepbed, I just had a new 355 engine built with a 700r4 and in the first tank of gas I got about 14.5 mpg. I have a 650 double pump holley. I was hoping to get at lease 16 or better. I think my problem is that the carb is to rich and that the 3.07 rear gears are to high. The engine is lugging when it goes in OD. I believe I need 3.42 gears.

You got 14.5 with a DP?!? I'm impressed! If you tried a Vacuum Sec. carb, you would probably get better mileage. What size cam are you using? What kind of heads are you running? Try driving around town in third and see if it makes a difference. With a high gear like that, I would only use OD on the interstate.

72MARIO · 12-02-2005, 01:05 AM

Are you sure it's a DP ? not a dual line feed ? Lot's of guys get that messed up.

Buckman · 12-02-2005, 11:55 AM

72mario, It's a dp all right. The cam is a edelbrock part #2102 with a edelbrock intake part #2601, don't know the spec on these with flat top pistons. The heads are 882 steel heads from chevy.

Bowtie67 · 12-02-2005, 04:50 PM

Barry Grant 750 Mighty Demon, Current average on new motor is 10-12MPG. Dynoed at 400RWHP & 425RWTQ, Distributor was acting up as well as some issues with the carb (running pig rich at Idle). I have sinced picked up the Inovative LM-1 setup so I can fine tune the carb much better. Ignition has been replaced from an HEI setup to a full MSD 85551 Dizzy, MSD 6AL Ignition box & Mallaroy Pro Master -E series 51000Volt Coil.

swb85 · 12-02-2005, 05:29 PM

Edelbrock 1405 manual choke on rebuilt 355, stock intake, lightly ported heads, small cam of unknown duration (guy before PO did it), m22 tranny, 3.42 rear with 29" tires and I get around 13mpg if I keep the secondaries closed, 11mpg if I have some fun

. All I know is that single 16gal tank is too damn small.

68Stepbed · 12-03-2005, 06:34 PM

Buckman, This may sound crazy, but I would run a 570 Strret Avenger. That cam, intake, and head pattern doesn't need alot of air. I think you would be very satisfied with the 570 SA. You would probably just have to jet it up a little.

I would also run a lower gear. 3.42 or 3.73 would be best.

Gary · 12-04-2005, 03:45 AM

Holley 750 - about 11 mpg.

12-01-2005, 10:28 AM	#27
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: What carburetor do you use? Edelbrock 1406. Simple to work on. I tried to lean it out some but gas mileage did not go up and performance went down. Getting 12-13mpg in town with 3.73 gears. Gear vendors doesn't help in town but really helps on the interstate. Havent checked the mileage but used to use 1/2 tank to get to hunt camp and now use 1/4.

12-01-2005, 10:37 AM	#28
jku72 Registered User Join Date: Jan 2002 Location: cornville, maine Posts: 659	Re: What carburetor do you use? On the burb, Q-jet, 3.07 rear, 18 mpg. __________________ jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers

12-01-2005, 11:29 AM	#29
GMan69 Registered User Join Date: Mar 2001 Location: Hernando, MS USA Posts: 1,152	Re: What carburetor do you use? Running an Edelbrock 1406 for now. MPG around 13 with THM 400 and 3.73 gears __________________ George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside

12-01-2005, 12:58 PM	#30
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	Re: What carburetor do you use? Edelbrock 1411 , rich out of the box ,Afraid to check milage . __________________ 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 ,

12-01-2005, 03:28 PM	#31
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 2,008	Re: What carburetor do you use? A HOLLEY 600 with a 383 425hp(dynoed) sbc, 700r4 & 3:73 out back. don't know the mi. - haven't driven ... yet!!

12-01-2005, 02:41 AM	#26
MACO Registered User Join Date: Sep 2005 Location: British Columbia CANADA Posts: 118	Re: What carburetor do you use? Running a Edelbrock #1406 600 cfm carb on my tired old 350 with stock intake and a adaptor plate for the carb. 10mpg mostly in the city stop and go traffic short trips. I have leaned this carb way out from the base setting and the engine runs great but the mpg did not go up that much. One thing about the Edelbrock carb is it is shure easy to adjust and the jets and needles are cheap. I would like to replace the intake with a proper matching intake and recheck my mileage. __________________ 1969 C20 Customer Camper CST, 396, TH400, Factory A/C, Olive Green.

12-01-2005, 04:00 PM	#32
Buckman Registered User Join Date: Sep 2005 Location: bedford Indiana Posts: 70	Re: What carburetor do you use? 68stepbed, I just had a new 355 engine built with a 700r4 and in the first tank of gas I got about 14.5 mpg. I have a 650 double pump holley. I was hoping to get at lease 16 or better. I think my problem is that the carb is to rich and that the 3.07 rear gears are to high. The engine is lugging when it goes in OD. I believe I need 3.42 gears.

12-01-2005, 07:33 PM	#33
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Re: What carburetor do you use? I have found with the 84 I get better millage when in 3rd not 4th I have a cam that works up wards of 3000rpm and a 31" tire combined with 3:45's drag me down below 2000rpm causing the luggiing. Bad combo =bad millage. Oh and it's a 1406 600cfm the elc choke F ing sucks up here in Canada. Get a manual choke if you live in a climate that has fluxuating temps. under 13 all the time. I have spent over $200 in gas in 5 days. 67 has a 650 speed demon 12mpg __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD Last edited by 72MARIO; 07-10-2006 at 11:04 PM.

12-01-2005, 08:48 PM	#34
DangerBoy Registered User Join Date: Nov 2005 Location: Springville, Ca Posts: 270	Re: What carburetor do you use? In my 68 shortbed im runnin a 650 cfm edelbrock performer on my 355 and 3.42 gears with a TH-350 and 27" tires. I pull off 16 on the freeway and about 10 drivin around town. __________________ 2002 S10 ZR2 for the dirt. 1968 C10 shorty for the street. She said the truck would be the end of us. I still have the truck!

12-02-2005, 01:05 AM	#37
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Re: What carburetor do you use? Are you sure it's a DP ? not a dual line feed ? Lot's of guys get that messed up. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

12-02-2005, 11:55 AM	#38
Buckman Registered User Join Date: Sep 2005 Location: bedford Indiana Posts: 70	Re: What carburetor do you use? 72mario, It's a dp all right. The cam is a edelbrock part #2102 with a edelbrock intake part #2601, don't know the spec on these with flat top pistons. The heads are 882 steel heads from chevy.

12-02-2005, 04:50 PM	#39
Bowtie67 Registered User Join Date: Jan 2004 Location: NH Posts: 2,266	Re: What carburetor do you use? Barry Grant 750 Mighty Demon, Current average on new motor is 10-12MPG. Dynoed at 400RWHP & 425RWTQ, Distributor was acting up as well as some issues with the carb (running pig rich at Idle). I have sinced picked up the Inovative LM-1 setup so I can fine tune the carb much better. Ignition has been replaced from an HEI setup to a full MSD 85551 Dizzy, MSD 6AL Ignition box & Mallaroy Pro Master -E series 51000Volt Coil. __________________ 1967 C10 - SWBSS Pro Street 427sbc, 700R4 & 4.10 Gears 1948 Chevy FleetMaster Coupe, LS1, (almost done) 1950 Chevy StyleLine Coupe 250/6 3x2 Dueces 2009 Toyota Tundra 1996 Harley RoadKing "I maybe getting old, but I can still burn rubber with the best of them"

12-02-2005, 05:29 PM	#40
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: What carburetor do you use? Edelbrock 1405 manual choke on rebuilt 355, stock intake, lightly ported heads, small cam of unknown duration (guy before PO did it), m22 tranny, 3.42 rear with 29" tires and I get around 13mpg if I keep the secondaries closed, 11mpg if I have some fun. All I know is that single 16gal tank is too damn small. __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

12-03-2005, 06:34 PM	#41
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: What carburetor do you use? Buckman, This may sound crazy, but I would run a 570 Strret Avenger. That cam, intake, and head pattern doesn't need alot of air. I think you would be very satisfied with the 570 SA. You would probably just have to jet it up a little. I would also run a lower gear. 3.42 or 3.73 would be best. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

12-04-2005, 03:45 AM	#42
Gary Senior Member Join Date: Jan 2004 Location: Harvest, AL Posts: 544	Re: What carburetor do you use? Holley 750 - about 11 mpg. __________________ Gary Harris 85 Silverado - 87 Grand National 2007 Ardmore Car Show



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