Webber IDF 40s, Help with tuning Options

[Chad911sc]

So I finally finished every aspect of my restoration and I’m on the final step before really being able to break my new 2056 in. I have the idle circuit close enough to where it needs to be with idle jets of 50. My problem is my transition from idle circuit to the main circuit. I had purchased a set of Gene Berg venturis that were a 30 idle circuit and then with wide open throttle they would increase the flow to 34. I thought this would be good with better flow at the top due to the web cam (86a) which is supposed to be more mid and top range power. I have ported 2.0 heads and 96mm pistons and cylinders. It also has the 123 distributor set on setting #3. The timing is set at 5 degrees base timing and 28 degrees total.
The problem is that if I even try to open the throttle more than an inch or so, the AFR gauge slams over to 16 or higher. So I’ve only driven it a few times after adjustments, and it does the same thing everytime.
I took out the fancy dual plain Venturis and put in a set of stock functioning 30 vents and just took it for another spin. It does the same thing with the 30s.
Current set up:
ET F11
Idle 50
Mains 130
AC 180
Vents 30
My float level is set at 10.5 with the gasket.
I’m at sea level in Florida.
As long as I just ride the pedal gently, the AFR stays in the 12-14 range all the way up to 4000 rpm. It idles at 10.5-11.5.
The carbs have been rebuilt and are synced and balanced.
I am ordering a set of AC and mains so I can adjust further as needed.
Should I try to go down on the air correction jet first to fatten it up on the top?
Or maybe something different with the float height to provide more fuel in the bowl?
Thanks in advance for all your advice. Can’t wait to be able to run this thing!!

[Chad911sc]

@SUPERHAWK996
Once again you are spot on! (IMG:style_emoticons/default/first.gif)
Put the 28s back in and took her for a spin….and whalaaa! Full pedal available and pulling nicely.
It actually is a little fat at WOT. I have a set of 120 mains I am going to try and see if it pulls better at the top with them. At WOT my AFR is reading 10-11.7
I also rechecked my float levels and they were not at what I had previously set them at, they must have changed when I pulled them apart the first time. So I reset both at 10.5 with gasket.
Also my fuel pressure had creeped up to 3.5, so I placed it just below 3.0lbs
Will change out the mains and see what happens tomorrow.

Thanks again to all of you who took the time to post and help me with every step of my restoration over the last 1.5 years. It’s been a daily grind, but always makes me happy to build something, and then have the satisfaction of ripping it down the road with a huge (IMG:style_emoticons/default/stromberg.gif) eating grin. (IMG:style_emoticons/default/aktion035.gif)

[porschetub]

@SUPERHAWK996
Once again you are spot on! (IMG:style_emoticons/default/first.gif)
Put the 28s back in and took her for a spin….and whalaaa! Full pedal available and pulling nicely.
It actually is a little fat at WOT. I have a set of 120 mains I am going to try and see if it pulls better at the top with them. At WOT my AFR is reading 10-11.7
I also rechecked my float levels and they were not at what I had previously set them at, they must have changed when I pulled them apart the first time. So I reset both at 10.5 with gasket.
Also my fuel pressure had creeped up to 3.5, so I placed it just below 3.0lbs
Will change out the mains and see what happens tomorrow.

Thanks again to all of you who took the time to post and help me with every step of my restoration over the last 1.5 years. It’s been a daily grind, but always makes me happy to build something, and then have the satisfaction of ripping it down the road with a huge (IMG:style_emoticons/default/stromberg.gif) eating grin. (IMG:style_emoticons/default/aktion035.gif)

what a great result ,take your mains down to 125 ,it seems a common number with these carbs running 28mm vents ...just saying .
Cheers.