I have a Edlebrock 1411 carb on my 396BB. From some previous posts And answers it was determined that I was running to lean. (Header pipes glowing red at idle, Sparks plugs are very light tan almost white) I purchased the edlebrock Carb Calibration kit # 1489 for my carb. Iam sitting here reading the carb owners manual and it refers you to a calibration reference chart. The chart shows you what to do to go up to three stages rich. (4%,8%, & 12%) I guess my basic question is ware do I start at 4,8, or 12% rich? I know there is going to be a certain amount of trial and error but I thought somebody here must have done this before. I am by no means a carb expert. As always thank you in advance.

if i did it i would start at 8% and go from there.to rich go down. to lean go up.

When I did it, I couldn't make heads nor tails of thier silly chart...

The kit came with .095, .098, and .101 jets. The carb had .098 in front, .095 in back.

It was lean and had a nasty off idle stumble.

I put the .101's in the primaries, .098's in the secondaries, then drove it. Much better at WOT, still a lil bog when starting out. I tried the next richer set of rods, then a few different springs and got rid of the bog.

Then I put her on a dyno. Still lean at WOT, went to .101's in the secondaries, now good.
dyno wideband showed a nasty lean spike when he punched it, he changed the rods and springs again. All good. (or at least a lot better)

Now I got a wideband in the dash. AFR is all over the place! But the car runs real well, and gets 20 mpg on the road.

My "new" used holley EFI System came in yesterday. When I install it, hopefully the wideband will run in a narrower range than 10:1 - 15.5:1!

Thanks Jim, I will give it a try.

I replaced my jets 3 stages richer then stock also installed the metering rods to go with them according to edlebrocks manual and changed the springs to the lighteist spring. Also reset my timing. The good news is my headers no longer glow red and the engine is running about 10* cooler then it did. Now the bad news I cannot get rid of the off idle stumble it is really bad. To the point ware if I dont feather the throttle the car will die. I have moved the arm on the accelter pump to each of the 3 holes and it is better at the lowest hole. witch I beleave this is telling me it is a fuel problem rather then a ignition problem. Any advice or suggestions would be greatly appreciated!!!!

I have been down this road too. I jetted richer and richer until I was off the chart Edelbrock gives you, and never got it rich enough to run correctly. The only time I have seen the Edelbrock carbs work is on a small stock motor, and the small cfm carbs. I'm sorry this is not helping you, but my advice is not to waste too much time trying to fix what cannot be fixed (kind of wax on wax off there). I ended up dropping a fairly wore out Holley 650 double pumper on with all the jets that it came with from Holley, and if fixed everything. I know I will get flamed for this, but I have never seen in person any kind of modified motor with a decent running Edelbrock. Stock, yes... Modified, no. I have heard all about how guys are getting 800 HP out of a built up 427 with them, but I have never seen it. Good luck. By the way, mine went on Ebay, and so did 150 bucks worth of jets and rods.

You need heavier springs.

The springs are trying to push the rods to "rich" while vac is trying to suck them down to "cruise".

A heavier spring will go to "rich" sooner and will fix your bog.

Also make sure the pump rod is in the outer hole to lengthen the shot.

As for Eric's comments... well to each thier own I guess. I was always a holley guy as well, and had dabbled some in q-jets. Then I bought this car that had a 1406 on it. I was able to (easily) tune that 600 cfm carb to support a 400 hp 383, and I've since gone to an 800 cfm carter afb that works really well also. Then there is member TokyoTorquer, who runs a pair of 600 cfm ede's on a blown big block with no issues....

You need heavier springs.

The springs are trying to push the rods to "rich" while vac is trying to suck them down to "cruise".

A heavier spring will go to "rich" sooner and will fix your bog.

Also make sure the pump rod is in the outer hole to lengthen the shot.

As for Eric's comments... well to each thier own I guess. I was always a holley guy as well, and had dabbled some in q-jets. Then I bought this car that had a 1406 on it. I was able to (easily) tune that 600 cfm carb to support a 400 hp 383, and I've since gone to an 800 cfm carter afb that works really well also. Then there is member TokyoTorquer, who runs a pair of 600 cfm ede's on a blown big block with no issues....
I hpoe no offense was taken Jim, I just did't have any luck with them. Friends???

I changed the light spring back to the middle range spring. That change made a instant change to the better. It still has a little stumble off idle. I tried going both ways from the middle spring and the middle spring (the orange one) seems to be the best. Then I moved the pump back to the middle hole and that also seems to work the best. I still have a little stumble and the miss at idle is better but still noticeably present. I know that MNM99 is having alot of the same problems so I will continue to wacth his posts closely. I will continue to tinker and analise mine own car. But as always and help or suggestions would also be very welcome. Does anbody think I should bring the car to somebody with a dyno machine and see whats going on? If so two questions does anybody know someone in the NJ area with a dyno and does anybody have a idea of cost? As always thank you for all of your guys help.