Thanks Mike: I talked to the Eddy tech line and the AVS2 tunes completely differently from the 1406. The tech I talked to recommended the rods I got and I bought the spring kit which has them all for $10 so its a no loose deal. They are working on the tuning charts for the AVS2 but they are not complete. I will just read my hot vacuum in park and go with the spring calling for that "of HG to start.
I've put on three AVS2 Carbs this year (2 on friends cars) and so far they have been great right out of the box. I put the 650 on my car but the weather has turned to **** so not much playing around with it. I'll put the A/F gauge on it in the spring. Was yours lean or rich and at what circuit? Also what is your altitude?
I started with a wideband on mine so it was easy to see. It is running fine at hot idle but rich at cruise, about 12.5+-. I want it to cruise about 13.5+- so it is a small adjustment. The tech wanted me to leave it alone but he isn't buying my gas so he reluctantly recommend the rod change that I bought and the spring kit was a no brainer. I will keep the thread posted.Bookmarking this one
I think a wideband is the way to go. A little fatter rod on the little end. Doesn't sound like it's that far off. As long as it doesn't ping. Have you noticed a difference in how it runs or sounds?
I just got my valvetrain sorted and checked my vacuum. I have 12" hot in park and 10" in drive. Will probably change the rods first without a spring change and go from there.
That's what Edelbrock told me. But it did not work. First of all, good luck figuring out which spring is which in that kit. The color-coding really sucks, and doesn't really jive with the chart they supply. I'm just doing trial & error now. Damn thing still has a big "bog" when you stomp on it.
I changed the rods and springs. I should have only changed the rods, putting stock springs back in in the morning. I redid my valve cover gaskets as I had a weep and tested the car. It idles at 14.6+- and cruises at 14,2/3 jumping around a bit. It is running 5 degrees hotter than is was so it's definitely leaner. I will test and report after putting original springs but leaving the fatter rod to see if that helps. With this weather I may just put the original stuff back in, winter likes a little more fuel. More later-------------------
Do you guys like the way they run? Is there a noticeable difference in them over your old Edelbrocks?
I changed from a Holley I fought for 2 years. There is no doubt in my mind that this AVS2 is the superior carburetor. After yesterdays changes my car ran the best it has since I put it together. I agree with the previous post though, Edelbrock beat the tuning knowledge to market with the product. I think I need to change springs to one set softer but wont the to it until later this week.
I am running a Lunati hydraulic version of the stock 273 Commando cam with a little more lift and duration, not much though. The pink spring is not the strongest but should be the one for 14" of vacuum at idle. I will do down one spring this week but I want to get some road miles on this setting to compare.
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