Engine Stalls/dies around hard corners. Edelbrock Carb - Chevelle Tech
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  #1  
Old Sep 19th, 10, 10:03 AM
Winston Wolf Winston Wolf is offline
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Default Engine Stalls/dies around hard corners. Edelbrock Carb

I'm helping a friend tune up a 69 convertable. We installed an Edelbrock 800 Thunder AVS on the car. When he takes a corner fast or hard, the car will stall out. (TH400 auto) The car runs well otherwise. I have tried adjusting the floats from over 5/8" down to almost 1/4" down. It still does it.

My question is why does it do it and how can I fix it. I don't see any airbleeds that can be covered with fuel slosh? but I've heard Performer carbs have these problems sometimes.

We are running a dual inlet feed line, as this a new design carb.

Would love some ideas.
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  #2  
Old Sep 19th, 10, 11:14 AM
jeff swisher jeff swisher is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

are you lowering the fuel level ?
here is 1 fix...
There is a transfer channel in the rear of the mainbody.....you will see it when you remove the top airhorn...I use jb weld or jb quick to seperate the fuel bowls ....I fill in that channel....and keeping your foot in it a little going around corners helps.

I can usually take cloverleafs at 60+mph in my truck..and no problems with my 750afb
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  #3  
Old Sep 19th, 10, 12:18 PM
cuisinartvette cuisinartvette is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Had the same problem with an Eddy carb years ago brand new. Couldnt fix it no matter what we tried, stuck a Holley on problem solved.
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  #4  
Old Sep 19th, 10, 1:18 PM
Winston Wolf Winston Wolf is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Quote:
Originally Posted by jeff swisher View Post
are you lowering the fuel level ?
here is 1 fix...
There is a transfer channel in the rear of the mainbody.....you will see it when you remove the top airhorn...I use jb weld or jb quick to seperate the fuel bowls ....I fill in that channel....and keeping your foot in it a little going around corners helps.

I can usually take cloverleafs at 60+mph in my truck..and no problems with my 750afb
I've tried both lowering and raising the float levels. What would filling in the transfer channel accomplish? I never thought of that?

It kills with no throttle and say a 20-30mph sharp turn.
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  #5  
Old Sep 19th, 10, 2:13 PM
DONTWANT2 DONTWANT2 is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

The thunder series carbs are supposed to handle that stuff i thought. As they were built for 4X4s for hills and such.
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  #6  
Old Sep 19th, 10, 4:08 PM
dean427pwr dean427pwr is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

whats the fuel pressure? if its more than the needle and seat can handle the carb will flood over on hard turns. check the needle and seats for wear. they make a spring loaded version needle and seat which i personally dont care for. make sure the top gasket isnt torn or ripped. just a few ideas
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  #7  
Old Sep 20th, 10, 5:26 AM
658Chevy 658Chevy is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

With my 650 AVS, it will "hiccup" for a second, but only on on left hand turn, not a right, and only if there's no additional pressure on the accelerator. Even when it does it, it's real minor and doesn't stall.

Jeff swisher called it. When I first got the Eddy, I called their techline, and while the guy denied that it would ever do that, he said a quick fix (in case it ever would do that, nudge, nudge) is to block the transfer channel with a piece a vacuum tubing inserted vertically. He said to cut it just a hair too long so that when the carb is put back together, it will compress and make a good seal.

I never made that fix as on my car it's very minor and hardly noticeable.
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  #8  
Old Sep 20th, 10, 1:03 PM
Winston Wolf Winston Wolf is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

What do you think plugging the transfer channel prevents? And what is the actual action that is causing the stall? Is it a vent hole getting sloshed with fuel or is it uncovering the primary jet? I believe the idle circuit feeds off the primary circuit to get it's fuel. This is happening with no foot on the throttle, so it's running just on the idle circuit.

I had this carb on my car for a couple weeks and it ran flawlessly, but I never take autocross style turns either....otherwise it's a brand new carb.
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  #9  
Old Sep 20th, 10, 2:23 PM
Tonys72SS Tonys72SS is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Quote:
Originally Posted by 67T56Elky View Post
Had the same problem with an Eddy carb years ago brand new. Couldnt fix it no matter what we tried, stuck a Holley on problem solved.
Same problem, same answer, same result!
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  #10  
Old Sep 20th, 10, 2:48 PM
MarkM MarkM is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Does it have the "off road" needle and seats? Which is basically a small spring that pushed the needle into the seat. If not, install those. They should come with all their carbs, but I know the normal afb's don't.

Here's a pic;



I've had this problem too, and installing these seats solved it for me.

I tried the JB weld in the bowl channel in the past, as the tech suggested. After awhile the JB softned up and come out.
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  #11  
Old Sep 20th, 10, 3:46 PM
Winston Wolf Winston Wolf is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Quote:
Originally Posted by MarkM View Post
Does it have the "off road" needle and seats? Which is basically a small spring that pushed the needle into the seat. If not, install those. They should come with all their carbs, but I know the normal afb's don't.

Here's a pic;



I've had this problem too, and installing these seats solved it for me.

I tried the JB weld in the bowl channel in the past, as the tech suggested. After awhile the JB softned up and come out.
I'll order the off-road seats, but did the JB weld solve the problem for you?
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  #12  
Old Sep 21st, 10, 11:22 PM
MarkM MarkM is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Quote:
Originally Posted by Winston Wolf View Post
I'll order the off-road seats, but did the JB weld solve the problem for you?
The off road seats worked for me.
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  #13  
Old Oct 9th, 10, 9:32 AM
MarkM MarkM is offline
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Default Re: Engine Stalls/dies around hard corners. Edelbrock Carb

Did you ever get it fixed?
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