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440 initial timing

K

kinghs95

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I start engine and I go to gas it and it won’t go above about 1200. Also shoots fuel up out the top of carb after it shut off. I have a 1411 electric choke 750 edelbrock carb. Could it be the high idle is set to low or too much fuel? I have it on the middle hole and it has better response but doesn’t seem to like to idle. I tried top hole and it would idle but as soon as you gave it throttle it would fall on its face.
 
kinghs95 said:
I start engine and I go to gas it and it won’t go above about 1200. Also shoots fuel up out the top of carb after it shut off. I have a 1411 electric choke 750 edelbrock carb. Could it be the high idle is set to low or too much fuel? I have it on the middle hole and it has better response but doesn’t seem to like to idle. I tried top hole and it would idle but as soon as you gave it throttle it would fall on its face.
Click to expand...
If the engine will not exceed 1200 rpm you may have several problems. Tell us more. New carb? Type of ignition? Fresh fuel?
Mike
 
493 Mike said:
If the engine will not exceed 1200 rpm you may have several problems. Tell us more. New carb? Type of ignition? Fresh fuel?
Mike
Click to expand...
Went to break it in which It got up to 3500 and it was sounding bad so I opened valve covers and two rods were off bc I forgot to adjust them from when I bought it. I opened it up and a lifter had come apart. So I bought complete new set of lifters and installed them. It fired right up and sounded good but won’t go above 1500
 
Where is your initial timing at slow idle, with vacuum line to distributor plugged?? I'd start with 2 to 5 BTDC. Depending on the cam, you may be able to follow the original timing reference from when the motor was factory built (as a start). HTH, Lefty71
 
Lefty71 said:
Where is your initial timing at slow idle, with vacuum line to distributor plugged?? I'd start with 2 to 5 BTDC. Depending on the cam, you may be able to follow the original timing reference from when the motor was factory built (as a start). HTH, Lefty71
Click to expand...
It’s about 10 btdc with vacuum advance unplugged and blocked off.
 
Also shoots fuel up out the top of carb after it shut off.

Float level is too high and or the fuel pressure is too high
fix your carb problems first and go from there
 
moes said:
Also shoots fuel up out the top of carb after it shut off.

Float level is too high and or the fuel pressure is too high
fix your carb problems first and go from there
Click to expand...
I checked float level and it was right height. But possible fuel pressure bc it’s a mechanical fuel pump straight into carb.
 
get yourself a gauge like this (vacuum and fuel pressure tester) or just a fuel pressure gauge. It should be around 6 psi.

IMG_1039.JPG
 
You have a lot going on for something that should be relatively simple.

If you can, find a friend to help you that maybe has some experience with tuning.
You should not need to mess with a new carb other than setting the idle. They come adjusted pretty close out of the box.
How did you check the float level ? Took top off the carb ? or removed and disassembled it.
Sounds like, based on what you have said so far that before you go any further you should go over the basics and make sure everything is tightened, adjusted, installed properly.

If it is a stock engine with only a cam change use your Factory Service Manual to see the basics on how the carb, timing etc... should be adjust to.
https://mymopar.com/service-manuals/
 
Last edited:
Have you double checked the plug wire installation with respect to [counterclockwise] distributor rotation?
 
Carbs blowing fuel over the top.
Lifters coming apart.
Push rods coming off rockers.

Change the oil . Pull the valve covers ck pre load and ck. For coil bind, ck push rod length.
Now check the carb floats again, both should be 7/16 & 13/16.
Check fuel pressure to the carb , like posted 6lb max on eddy.
Dbl, ck. Firing order and plug wire routing.
 
kinghs95 said:
I start engine and I go to gas it and it won’t go above about 1200. Also shoots fuel up out the top of carb after it shut off.
Click to expand...

That is likely not fuel pressure. You need to give a better description on exactly what is happening here. If the engine is blowing back through the carb after turing it off, this is a timing or valve event issue.

kinghs95 said:
Could it be the high idle is set to low
Click to expand...

I don't know what you mean. Are you talking about a cold motor or after it is warmed up?

kinghs95 said:
or too much fuel?
Click to expand...

Maybe

kinghs95 said:
I have it on the middle hole and it has better response but doesn’t seem to like to idle.
Click to expand...

Not sure what you are talking about here. What holes? Squirter pump linkage? If so, it has nothing to do with idle

kinghs95 said:
I tried top hole and it would idle but as soon as you gave it throttle it would fall on its face.
Click to expand...

Same, what hole.

You have given us a lot of pieces, but you need to help us connect the dots. You said that the motor was rebuilt. What was done? What parts of the engine did you assemble? Based on you statements, it sounds like it has never run correctly since the rebuild, is that correct?

Do a cylinder pressure test.
Check fuel pressure
Check for vacuum leaks
Verify top dead center.

After you answer the question, we'll probably have more questions to help give you more suggestions.
 
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