Carter AVS Lean Spot

[kawahonda]

One thing that's going through my mind, correct my thinking.

Let's say the plug is perfect. I mean, as perfect as anyone would want to mess with without AFR gauge and such. At that point, if the intermittent stumble through aggressive driving is still present, wouldn't it make sense to then turn to the idle bleed mod? Let's say I stick a little wire in there. That will requiring tightening the mixture screws to reduce air. Obtain the highest vacuum. All good. Stumble fixed....but plug readings should remain the same, correct?

Basically, I'm asking if plugging the idle bleeds (or drilling it out, take your pick) then resetting mixture screws will lead to the same plug reading...

In my mind, it makes sense to get a good reading on the plug first, then determine next step. It may be that the plug reads pretty darn good. That tells me to not fuss with the metering rods anymore? If plug reading still shows a lean idle, then that quickly means to focus on the fat part of the rod.

[RUNCHARGER]

I think so yes. In my experience you will get it pretty good without an AFR gauge too, it just takes longer. After setting my 528 up and figuring I had it, I finally bought an AFR gauge to get it closer. I was a bit surprised that I had it right on using ears, nose and sparkplugs. Just be happy you have a single carb and no staggered jetting.

[Chryco Psycho]

 sure try restricting the bleeds , nothing to lose but time

[kawahonda]

After 30 miles. Still needs more time I think.

[Chryco Psycho]

I can color a plug in a 1/4 mile
30 miles and that clean , I believe it could be richer

[kawahonda]

Richer across the board?

If so, that makes me feel very good about the set that I just ordered......just need to emery the tips.

This really is evidence that the 340 could do with the 440 AVS carb if so.

[Chryco Psycho]

I have no clue how you are driving it , if you are idling a lot then just the idle screws need adjustment , if you are cruising then the thickest part of the rod is too large , , I usually find a wide open area or drag strip & do an extended WOT , shut the car off coast to a stop & see what color the plugs are to test WOT / rods up smallest part of the rods 

[kawahonda]

Yep, I have never done an official WOT plug chop. Too many damn cars on the roads today and not a lot of pull-off spots.

Very little idle time with what you see. Idle is set to highest vacuum reading. What you see is mostly cruising/city and slightly aggressive off-idles during take-offs. I WOT'd as much as I could, within reason. I left a bit ass F%*$ing patch in parking lot before coming home. Fiance said she will never rid with me again.

Does that help anything or not really? What's a safe way to turn off the car....shift to neutral first, then turn key off?

The new rods that are coming rich out the cruise by a step, but it also riches out transition. It's an interesting rod.

If you don't like that idea, I have another set of rods that would be pretty fair game for emery-cloth....

Current: .063 x .060 x .051
Stock:    .065 x .064 x .055
In mail:  .0615 x .058 x .055

Rods that may be interesting to modify: .065 x .062 x .053

Come on Neil, 3 step rods make it fun....and Carters look sexy.

[Chryco Psycho]

What you are seeing then is rods down , so if you have different rods that will richen it a step I would do that first
FYI be very careful shutting down from WOT , do Not lock the steering just go back 1 click & yes I would go to Neutral .
WOT Is rods up .

[kawahonda]

Sounds like you'd plug the "in mail" rods in right away!

[Chryco Psycho]

 

[kawahonda]

Installed  .0615 x .058 x .055 rod. Worked the .055 to .050.

Drove it 10 miles.

No stumbles at all.

I'm a bit floored why/how I picked up low end horsepower/torque. Spinning tires is easy with no lag or hesitation. Car is VERY responsive now.

My vacuum in park is 16 inches.  My vacuum in drive is 13.5 inches. I have the stock step-up springs, but also have the assortment pack. Should I leave them be?

[Chryco Psycho]

Did your fiance go with you ?
it still needs more fuel but it is better , more color

[kawahonda]

Going to leave her right there for now.

Does the insulator take more time to get color? That's WOT, correct?

[Chryco Psycho]

No if it was going to color it would have color now , it may color differently cruising vs WOT requiring a change