Still struggling with car at idle after 8 years

[Mark Maras]

@jalexquijanoIMO, it looks like the rear carb is too rich, and the front carb may be too lean. Both nozzles down 3 1/2 turns. I'm left with the float level(s) being wrong.  @siteunseenCan the difference in the later lids be a possibility here? I've only dealt with the early lids with identical float hinge bosses.

[siteunseen]

The valves used to be different heights to compensate front and rear for acceleration.

To simplify adjustment I have two of the short ear lids. Another member here drilled the holes higher for the float pins to be the same.

 

[jalexquijano]

This guy posted a video adjusting the floats: 

 

Is this the correct way to adjust them? I also have some float synch to perform adjustments.

 

[gundee]

3 hours ago, Mark Maras said:

@jalexquijanoIMO, it looks like the rear carb is too rich, and the front carb may be too lean. Both nozzles down 3 1/2 turns. I'm left with the float level(s) being wrong.  @siteunseenCan the difference in the later lids be a possibility here? I've only dealt with the early lids with identical float hinge bosses.

I agree with you. I think one carb is lean and one is rich for some reason.

The motor itself I think is good. So lets try to find a way to get the plugs to match.

Lets all take a look at the carb and manifold picture if we can get one.

Also do you have a carb sync tool?

 

[siteunseen]

I've wondered if it's a misunderstanding in raising and lowering the nozzles by way of the direction the mixture nuts being turned.

 

[jalexquijano]

3 hours ago, siteunseen said:

I've wondered if it's a misunderstanding in raising and lowering the nozzles by way of the direction the mixture nuts being turned.

 

Let me ger this clear when i mean 3.5 turns clockwise is lowering the nozzle from the bridge 3.5 turns. The standard is 2.5 turns clockwise. At that setting the car has no punch at all even at 3 turns it lacks power.

 

[gundee]

One thing I would do is remove the domes, and pull the pistons.

To check if the needles are set the same depth in the piston. 

If one is recessed into the piston more than that one would be rich compared to the other.

[gundee]

The next thing while the dome and  pistons are removed you can turn the jets knobs to the full

up position. Then look. Do they look the same depth. Are we starting with both jets at the same position.

For example turning a jet knob 2-1/2 turns down does not mean they are the same if the starting points are different.

Did you say these were Z-Therapy carbs?

[jalexquijano]

Its up position and them turning them 3.5 turns clockwise  each. 

[jalexquijano]

Just now, jalexquijano said:

Its up position and them turning them 3.5 turns clockwise  each. 

We are starting from flush with bridge position and yes both ztherapy.

[emccallum]

Just a thought....Are they balanced at driving rpms? Run it up to 2-3k rpms and check balance with a unisyn, maybe one is opening more than the other at speed. 

[jalexquijano]

8 minutes ago, emccallum said:

Just a thought....Are they balanced at driving rpms? Run it up to 2-3k rpms and check balance with a unisyn, maybe one is opening more than the other at speed. 

I balanced the carbs on saturday at 2 and 3k rpms with a unisyn. This was checked already