Re: Why don't more people run Edelbrock carbs?
[Re: Hot 340]
#1940316
10/28/15 01:17 PM
10/28/15 01:17 PM
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Joined: Jan 2003
Posts: 17,928 Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,928
Akron, Ohio
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I had two 750 Eddy carbs on a tunnel-rammed 451, went 136 mph first time out with them! I switched to a couple custom Quickfuel carbs since they were alot easier to tune and the 60 foot was better but the Eddy carbs were cheap and worked quite well.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: Why don't more people run Edelbrock carbs?
[Re: preddy]
#1940384
10/28/15 02:57 PM
10/28/15 02:57 PM
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Joined: Aug 2003
Posts: 3,249 Between a rock & a hard place
cudadoug
master
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master
Joined: Aug 2003
Posts: 3,249
Between a rock & a hard place
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I'm Not familiar at all with them. Never hear much about them either. Do they hurt power? Hard to tune? I can relate. I've been a Holley guy for a long time and recently was forced to live with Edelbrocks. My FHO Hemi has two Edelbrock 1805 Thunder Series 650 CFM carbs. These are designed for single carb applications not dual so they can dump a lot of fuel and had been leaned out considerably. So recently, I was driving it on the street and it being Fall, the air is really good around here and I when I stepped on it, I could feel the engine lean out and pop. I have a wide band O2 sensor and could also see it leaning out. I knew I was planning on running it at the Nostalgia Drags at Capitol on Saturday and knew I needed to fatten up the carbs. It was a piece of cake. I changed the front metering rods. Think of these like restricting the front jets so they control how much fuel the jets allow. The secondary jets are simple to replace. Just take the top off. It's about the same level of effort as taking the bowls off a Holley except you only have 1 fuel inlet to disconnect instead of 2 and, you need to disconnect the accelerator pump - it's easy with one clip. You can leave the fuel in the bowl while you do it. I changed the secondary jets from .086 to .092 and went to slightly smaller metering rods in the primaries - Tim Banning's suggestions . They allow more fuel through. The only thing that made it harder was the fact that I had 2 carbs to deal with. So I took it to the track on Saturday. I had no idea how the Edelbrocks would feel. I had no idea how they would perform and if I had the jetting right. I was rewarded with a second pass of 10.03 @ 134 and 1.37 60's. I'm pretty sure I could have run some nines if I had time to experiment with them. Those carbs worked great. Zero issues. The car was deadly consistent. I'm a believer now... http://www.tdspeedshotz.com/wp-content/g...015-CR-1225.jpghttp://www.tdspeedshotz.com/wp-content/g...015-CR-1419.jpgYou better update your signature! How big is that Hemi?
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Re: Why don't more people run Edelbrock carbs?
[Re: Dodgem]
#1940399
10/28/15 03:04 PM
10/28/15 03:04 PM
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Joined: Jan 2003
Posts: 20,329 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
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Posts: 20,329
Park Forest, IL
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Ran a 1406 on a stock 400 in a big old Newyorker a while back. Came lean out of the box, but easily fixed with needle / jet change. Only issue was it had a tendency to heat soak in real hot weather. Went back to a modified TQ and the heat soak issue went away. Now that's a sweet looking car X2
"Everybody funny, now you funny too."
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Re: Why don't more people run Edelbrock carbs?
[Re: Hot 340]
#1940424
10/28/15 03:23 PM
10/28/15 03:23 PM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
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The biggest problem with an Ebrock in a single, NON TUNNEL RAM application is heat soak , even with the heat riser blocked , the crap fuel we have today will literally boil off while you are driving it.
Mainstream Media is the new Pravda
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Re: Why don't more people run Edelbrock carbs?
[Re: dvw]
#1940470
10/28/15 04:24 PM
10/28/15 04:24 PM
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Joined: Apr 2012
Posts: 18,880 -
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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because they suck... ok to be fair they work well on a street car, meaning not raced. If you want to go racing with them you'll need two. Not hard to tune, they just don't tune well. If you run a mild BB you'll need the 800 thunder.
I've won a fair amount of races in both Pro and N/SS with them. Doug You ain't alone... For carbs 'that suck', there sure are a lot of 'em out there kicking serious a$$...
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Re: Why don't more people run Edelbrock carbs?
[Re: Hot 340]
#1940475
10/28/15 04:39 PM
10/28/15 04:39 PM
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Joined: Dec 2005
Posts: 259 Scatchamatoon
Saskabusa
enthusiast
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enthusiast
Joined: Dec 2005
Posts: 259
Scatchamatoon
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This thread makes me wonder.
What is the fastest car on Moparts with a single Edelrock carb?
Who has the highest dyno number with a single Edelbrock carb?
1974 Roadrunner
1967 Charger
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Re: Why don't more people run Edelbrock carbs?
[Re: an8sec70cuda]
#1940514
10/28/15 05:38 PM
10/28/15 05:38 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Sixpackgut's car ran REAL good w/ the big block and a pair of Edelbrocks on a tunnelram. Thanks Chip. Mine went 140 mph with a pair of Edels. I really like the carbs and they idle a lot better than Holleys
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Why don't more people run Edelbrock carbs?
[Re: AndyF]
#1940566
10/28/15 06:51 PM
10/28/15 06:51 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
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Posts: 3,916
usa
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They idle a ton better than a Holley. The Edelbrock has a really sophisticated idle circuit with an internal restriction and air bleed setup that is designed to mix air in with the fuel. I don't have the technology to understand exactly how it works but the difference on a "hot rod" type of engine is usually very impressive. your right, the idle/cruise circuts on the afb's are more sophisticated than the holleys. they may have as many as 4 idle/low speed air bleeds with a minimum of at least 2. the one i haven't figured out yet is the "economizer". the clusters are always mixing air with the fuel. i have a ch28 set-up that's a super driver and is more fuel efficient than any holley.
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Re: Why don't more people run Edelbrock carbs?
[Re: JohnRR]
#1940568
10/28/15 06:54 PM
10/28/15 06:54 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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The biggest problem with an Ebrock in a single, NON TUNNEL RAM application is heat soak , even with the heat riser blocked , the crap fuel we have today will literally boil off while you are driving it. john, i haven't found any difference between a holley or afb when it comes to heat soak. on my junk they both have/had heat soak issues. the only solution i found for either carb was a fiber insulator gasket, and winter blend fuel really ups the tune-up misery factor for either carb.
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Re: Why don't more people run Edelbrock carbs?
[Re: lewtot184]
#1940618
10/28/15 08:21 PM
10/28/15 08:21 PM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
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The biggest problem with an Ebrock in a single, NON TUNNEL RAM application is heat soak , even with the heat riser blocked , the crap fuel we have today will literally boil off while you are driving it. john, i haven't found any difference between a holley or afb when it comes to heat soak. on my junk they both have/had heat soak issues. the only solution i found for either carb was a fiber insulator gasket, and winter blend fuel really ups the tune-up misery factor for either carb. In my limited experience is with 2 different cars, 2 different motors, but both in the same area and both with alum manifolds, and the heat riser blocked using the same type fuel ... both cars run stock iron exhaust manifolds. The car running a 30 yr old Holley DP with the big air grabbber air cleaner and no spacer of any kind under it has no heat soak problems after two summers, ambient temp has not been a factor and no hard restart after getting the jetting close????? The other car with a new thunder 800 and a stock dual snorkel air cleaner got hot to the point it wouldn't idle at a stop light without stalling and was hard to restart. I really thought the Holley would have the same issues and was shocked it didn't.
Mainstream Media is the new Pravda
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Re: Why don't more people run Edelbrock carbs?
[Re: Hot 340]
#1940717
10/28/15 10:54 PM
10/28/15 10:54 PM
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Joined: Nov 2003
Posts: 5,160 Texas
dannysbee
master
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master
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Texas
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There are lots of nhra stockers running in the 10' s with one AVS. Just a AFB, edelbrock with a adjustable air door.
Getting old just means you were smarter than some and luckier than others.
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Re: Why don't more people run Edelbrock carbs?
[Re: dannysbee]
#1940838
10/29/15 03:23 AM
10/29/15 03:23 AM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
master
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master
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North Alabama
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There are lots of nhra stockers running in the 10' s with one AVS. Just a AFB, edelbrock with a adjustable air door. Probably ONLY because they HAVE to
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Re: Why don't more people run Edelbrock carbs?
[Re: Hot 340]
#1940853
10/29/15 06:06 AM
10/29/15 06:06 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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The Carter/Edelbrock carbs have small fuel bowls where the floats take up a good percentage of the space in the bowl, and this makes them pretty sensitive to the fuel level in the bowls, but there is no easy way to see and adjust the float level like on a Holley. So you have to run the fuel pump or engine to fill the float bowls, pull the carb top off, check the fuel level, and adjust the floats if needed, then put the carb top back on, and repeat as needed. Then if you are not careful tuning, and just throw different metering rods at it you can really upset the fuel metering as some rod changes can be like several jet sizes different, and the step size differences are all over the place. There are over 30+ different Edelbrock metering rods, and several more Carter metering rods to choose from with metering rod step size differences from 0.0000" to 0.0380". Considering each jet size change is 0.003" a single rod change could be the same at 10 or more jet sizes. Then there is only the single accelerator pump, discharge nozzle and the AFB has the non-adjustable secondary opening rate. Also, only offered in a limited range of CFM ratings. I think all come with a choke too?
There is nothing really wrong, but they can be a challange to tune them, and this dosen't even compare to a higher end 4150 or 4500 carb that has adjustable (screw-in) restrictions, air and emulsion bleeds.
Carb comparisons on a drag car can be misleading because the carb is only operated at idle and wide open throttle in usually warm weather, not to mention most drag cars have high stall converters or launch at a high RPM so the secondarys will come in really quick because the engine is always operating at high RPM.
The Carter/Edelbrock carbs do seem to usually work well on street cars out of the box (if the floats are adjusted correctly.) Most have electric chokes for cold weather operation, and they are less expensive than the Holley type carbs.
Other reasons the Holley carbs are referenced here more (in the race section) is many of us are running 950+ CFM chokless race carbs.
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Re: Why don't more people run Edelbrock carbs?
[Re: Monte_Smith]
#1940854
10/29/15 06:06 AM
10/29/15 06:06 AM
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Joined: Jun 2008
Posts: 10,958 Oakdale CT
gdonovan
I Live Here
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I Live Here
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Oakdale CT
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There are lots of nhra stockers running in the 10' s with one AVS. Just a AFB, edelbrock with a adjustable air door. Probably ONLY because they HAVE to If you put the time in to learn how they work and how to modify them they run just as well as a Holley of comparable size.
"I think its got a hemi"
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Re: Why don't more people run Edelbrock carbs?
[Re: gdonovan]
#1940861
10/29/15 06:42 AM
10/29/15 06:42 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Aurora, Colorado
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If you put the time in to learn how they work and how to modify them they run just as well as a Holley of comparable size. I think that I spent more money on tuning parts for my carbs than what the carbs cost. I must have over $1,000 in jets, rods, power valves, screw in restrictions, air bleeds, step-up springs, discharge nozzles, vacuum secondary springs, accelerator pumps and pump cams, pin drills, and other specialized carb tools.
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