No wide open throttle!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roughedup72 · 07-31-2006, 09:19 PM

After installing my edelbrock carb on my truck I took it for a drive,It seems as if it doesnt have wot. Any suggestions what to do?

Longhorn Man · 07-31-2006, 10:20 PM

first you need to verrify this to be true. The carb might be needing tuned, and just doesn't make the power that your last carb did.

jhow66 · 07-31-2006, 10:28 PM

Engine OFF. Have someone in cab floor the pedal. Look down in front 2 barrels of carb and see if throttle blades are straight up and down. If not , adjust linkage . (what bracket did you use to mount cable?)

roughedup72 · 08-01-2006, 09:29 AM

Thanks yall,
The carb seems to be set up right,
jhow66 I used the factory throttle cable bracket.Do I need to get an after market bracket?

jhow66 · 08-01-2006, 09:53 AM

Quote:

Originally Posted by roughedup72

Thanks yall,
The carb seems to be set up right,
jhow66 I used the factory throttle cable bracket.Do I need to get an after market bracket?

Probably so as the distance between the carb lever and cable bracket on each carb is differant.

roughedup72 · 08-01-2006, 10:32 AM

O.K. I guess I am going to make another trip to the parts store.

matthufham · 08-01-2006, 11:13 AM

on mine i found out the cable from the pedal to the carb should have a stopper on it near the pedal, and my pedal wasn't pulling the cable far enough because of all the slack in the cable.

roughedup72 · 08-01-2006, 01:24 PM

good tip matthufham. I will check it out.

**Boog** · 08-01-2006, 07:28 PM

Not sure how the edel carb is made but a quadrajet secondary will not open until the choke is open all the way. Also the secondary air valve of a quadrajet has an adjustable spring to speed up or slow down the opening rate of the air valve. Makes for a smooth transition from 2 brl to 4 brl. The edel may have some of the same adjustments.

LUV2XCLR8 · 08-01-2006, 09:45 PM

WOW, Great advice 66

69-350 · 08-02-2006, 01:05 AM

also, another piece of advice with Edelbrock stuff.... when I installed Edelbrock's Performer Intake Man. and Carb on my 350, I couldn't get my secondary butterflies to open very much at all... figured it out that the manifold didn't let the carb open WOT, had to buy a spacer for it, after which it did work. One more way Edelbrock can milk you for money.

roughedup72 · 08-02-2006, 09:03 AM

69-350 Which intake were you using, Mine is a performer, I havent been able to work on it yet to see whats happening so I'm collecting all this info in advance.

69-350 · 08-02-2006, 06:38 PM

I just used the regular old Edelbrock Performer intake manifold (square bore I think) with their #1406 600cfm Electric-choke carburetor. When we tried to open her up, she would stop cause she was hitting the secondaries on the manifold's bore about 3/4 throttle or so. So I had to run to the parts store and buy a 25 dollar spacer, after which it worked. And don't forget to put gaskets in there, after she could run wide open, with a giant vacuum leak because somebody forgot the gasket between the spacer/carb it ran so wide just starting it that it floated the valves. I think I've got it down now, the beast is timed perfect, the carb is tuned perfect (thanks to a buddy and his college auto-techeducation and his timing light) and it's just too bad I've got to tear the motor apart to replace some bad rings on the passenger side.

roughedup72 · 08-03-2006, 09:51 AM

Sounds like the same one I'm running. I dont think mine is hitting though,But I will check in a little bit.

69-350 · 08-03-2006, 10:20 AM

you should do that. if I'm not mistaken, I think the intake is a square bore, and the carb is meant for a spread bore(?) Either way, I bought an Edel intake and carb, and they didn't bolt right up to each other. What a deal there, huh?

07-31-2006, 10:20 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: No wide open throttle!! first you need to verrify this to be true. The carb might be needing tuned, and just doesn't make the power that your last carb did.

07-31-2006, 10:28 PM	#3
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: No wide open throttle!! Engine OFF. Have someone in cab floor the pedal. Look down in front 2 barrels of carb and see if throttle blades are straight up and down. If not , adjust linkage . (what bracket did you use to mount cable?) __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

08-01-2006, 09:29 AM	#4
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: No wide open throttle!! Thanks yall, The carb seems to be set up right, jhow66 I used the factory throttle cable bracket.Do I need to get an after market bracket? __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-01-2006, 10:32 AM	#6
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: No wide open throttle!! O.K. I guess I am going to make another trip to the parts store. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-01-2006, 11:13 AM	#7
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: No wide open throttle!! on mine i found out the cable from the pedal to the carb should have a stopper on it near the pedal, and my pedal wasn't pulling the cable far enough because of all the slack in the cable.

07-31-2006, 09:19 PM	#1
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	No wide open throttle!! After installing my edelbrock carb on my truck I took it for a drive,It seems as if it doesnt have wot. Any suggestions what to do? __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-01-2006, 01:24 PM	#8
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: No wide open throttle!! good tip matthufham. I will check it out. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-01-2006, 07:28 PM	#9
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,452	Re: No wide open throttle!! Not sure how the edel carb is made but a quadrajet secondary will not open until the choke is open all the way. Also the secondary air valve of a quadrajet has an adjustable spring to speed up or slow down the opening rate of the air valve. Makes for a smooth transition from 2 brl to 4 brl. The edel may have some of the same adjustments. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

08-01-2006, 09:45 PM	#10
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,484	Re: No wide open throttle!! WOW, Great advice 66 __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

08-02-2006, 01:05 AM	#11
69-350 Oil trash and damn proud of it Join Date: Aug 2005 Location: Williston, ND Posts: 1,993	Re: No wide open throttle!! also, another piece of advice with Edelbrock stuff.... when I installed Edelbrock's Performer Intake Man. and Carb on my 350, I couldn't get my secondary butterflies to open very much at all... figured it out that the manifold didn't let the carb open WOT, had to buy a spacer for it, after which it did work. One more way Edelbrock can milk you for money. __________________ Mark 1997 K1500 Z71, 14 bolt SF 3.73 posi, Bright Blue Metallic. 6" Superlift 1972 C-10, toolbox, p/s, 350/TH350/3.73 open, black int., bronze 2008 Dodge MegaCab. H&S tuned 6.7 Cummins. Fast Four Tons Some of my pics http://s107.photobucket.com/albums/m294/69-350/

08-02-2006, 09:03 AM	#12
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: No wide open throttle!! 69-350 Which intake were you using, Mine is a performer, I havent been able to work on it yet to see whats happening so I'm collecting all this info in advance. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-02-2006, 06:38 PM	#13
69-350 Oil trash and damn proud of it Join Date: Aug 2005 Location: Williston, ND Posts: 1,993	Re: No wide open throttle!! I just used the regular old Edelbrock Performer intake manifold (square bore I think) with their #1406 600cfm Electric-choke carburetor. When we tried to open her up, she would stop cause she was hitting the secondaries on the manifold's bore about 3/4 throttle or so. So I had to run to the parts store and buy a 25 dollar spacer, after which it worked. And don't forget to put gaskets in there, after she could run wide open, with a giant vacuum leak because somebody forgot the gasket between the spacer/carb it ran so wide just starting it that it floated the valves. I think I've got it down now, the beast is timed perfect, the carb is tuned perfect (thanks to a buddy and his college auto-techeducation and his timing light) and it's just too bad I've got to tear the motor apart to replace some bad rings on the passenger side. __________________ Mark 1997 K1500 Z71, 14 bolt SF 3.73 posi, Bright Blue Metallic. 6" Superlift 1972 C-10, toolbox, p/s, 350/TH350/3.73 open, black int., bronze 2008 Dodge MegaCab. H&S tuned 6.7 Cummins. Fast Four Tons Some of my pics http://s107.photobucket.com/albums/m294/69-350/

08-03-2006, 09:51 AM	#14
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: No wide open throttle!! Sounds like the same one I'm running. I dont think mine is hitting though,But I will check in a little bit. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

08-03-2006, 10:20 AM	#15
69-350 Oil trash and damn proud of it Join Date: Aug 2005 Location: Williston, ND Posts: 1,993	Re: No wide open throttle!! you should do that. if I'm not mistaken, I think the intake is a square bore, and the carb is meant for a spread bore(?) Either way, I bought an Edel intake and carb, and they didn't bolt right up to each other. What a deal there, huh? __________________ Mark 1997 K1500 Z71, 14 bolt SF 3.73 posi, Bright Blue Metallic. 6" Superlift 1972 C-10, toolbox, p/s, 350/TH350/3.73 open, black int., bronze 2008 Dodge MegaCab. H&S tuned 6.7 Cummins. Fast Four Tons Some of my pics http://s107.photobucket.com/albums/m294/69-350/



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