I replaced the old Qudrajet carb with a new Eldebrock 650cfm on my 455 Olds.

My problem is with the throttle cable. From where the cable mounts to the engine & out to the end that attaches to the carb, the Edelbrock is 2" closer to the front of the engine.

Or the cable that opens & closes the carb is 2" to long. (my cable wraps around & mounts on the front of the engine.) Thus I cannot get the carb to idle down. Do you know of anybody who makes a throttle linkage extenstion for the Edelbrock carbs?

I saw the Ford adapter, but it doesn't look like it will solve my problem. I need to move the cable attachment, on the linkage, back 2".....Thanks in advance for your expertise....-Rich

Buy one of these, install it between the carb and manifold, attach the throttle cable to it. DONE
Super simple!

Can you explain how a carb with less airflow capability runs leaner than one that can flow more air?

Smaller carb, smaller supplied  jets...smaller jets less fuel. Less fuel=lean!

Flow chart off?



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I don't remember the op saying he had a correctly jetted 650 carb, did I miss something?

GT, I disagree with you...wouldn't be the first time.




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http://auto.howstuffworks.com/auto-racing/nascar/nascar-basics/nascar-safety4.htm

This article states points contrary to what you indicate.

Also, don't know if you noticed, I don't post here much...especially in terms of in depth subjects such as this one...I don't need to write out a lengthy explanation of my view point ( like others do ) for you or any else  to immediately jump to a conclusion that isn't factual!

Truthfully,  you know as well I I do, that an out of the box afb 650 will not run right on a 455 in a heavy jet boat. Call it anemic if you'd like...


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Well I hate to say it, but your link 100% confirms what I just said. " Restrictor plates are placed between the carburetor and the intake manifold to reduce the flow of air and fuel into the engine's combustion chamber, thus reducing horsepower and speed."

Did I say or do something to piss you off?


For the record, the air flow "pulls" the fuel into the engine, less air, less fuel. I have a pretty good understanding of how a carburetor works. For that matter EFI. I was not saying a 650 CFM carburetor was the right choice on a 455, what I did say was that it will not run lean.

I also piggy backed onto what  lbhsbz stated, you're not pissing in his Corn Flakes...  :- WTF?

GT

GT, your not pissing me off...

You said that restrictor plate engines run like they are scared...
My understanding of that analogy is " fast"
Reducing horsepower and speed is quite opposite, no?

Also, what makes a 650cfm carb a wrong choice for a 455?





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Then how does a restrictor plate engine run like it's scared... They don't lean out. 

I love it when people disagree with me... No really I do.

Did you notice you didn't back it up?

If I pull a carburetor off of a properly running four cylinder houseboat motor and bolted it to a 496 Chevy, all things being equal, it will not run lean. But it sure will be anemic.

GT

I virtually type for a living sometimes writing 20 page reports on equipment condition and all my work orders are all via computer.

I also do a bit of DDC programming and play with computers days at a time.

What I was saying about the restrictor plate engines running like they are scared, I was basically speaking in terms of they run the same, but with less airflow, that also reduces the fuel flow, the only thing that happens is they make less poo poo... But they do not lean out.

The reason a 650 CFM carburetor is the wrong choice IMHO is that it will be under carbureted for the hp requirements of the jet pump. An automotive engine will seldom if ever see 5,000 RPM for hours at a time. Which is why it would perfectly fine for a station wagon.

The idea on sizing a carburetor on a jet is to lower the manifold pressure enough to keep the VE at it's maximum point possible. The closer to atmospheric pressure you get on a WOT motor, the higher the volumetric efficiency.






I'm mostly on my phone typing, so it's not as convenient as an actual keyboard...not that a keyboard for is much better 😜

Let's agree to disagree. I'm sure one day when we meet in person, we can discuss in more detail...

Iv had two customers whose motors had burnt valves... Both times they were running 600cfm carbs.
With my experience, I blame the carbs in both instances.