Three emulsions better than two?

[jmarkaudio]

What carbs and sizes were you comparing, what boosters? With 2 carbs annulars should always be better unless its a blower that adds a lot of heat to the fuel.

[HarrysTaxi2]

The Holley's were 750's.....I just switched main bodies between annular and downleg with both being the same Holley HP versions. Between the two, the annulars did seem to work the best, however I also spent the most time on them.

The Dambests are 1.58 main bodies w/1.75 base plates. it says they're 994 cfm @20". I suspect it's their higher signal strength that has been the biggest benefit in my case. I was trying to minimize the lean spike at the shift and that's what led me to trying his.....it was a tossup between Dambest or Braswells with 3-4 circuit. As it looks now, I'm pretty happy with the route I went. Don't get me wrong, I'm not obsessed with signal strength alone, but I think the added bleed air it requires would make for finer and lighter fuel droplets.

I have to add that I didn't realize the newer twinblades from Mike Laws were a higher signaling carb also or I may have considered going that route too.

[jmarkaudio]

Signal is created most by the booster, not usually by the carb body unless the venturi shape is poor like the Ultra 950 1.600 body. If you want better signal I have some really good annulars...

[HarrysTaxi2]

In the dambest's case, the signal is greater due to a combination of both booster and booster location within the venturi.

this might explain it better than I could. https://www.youtube.com/watch?v=IzgIFRC62nw

[mike laws]

[Right hand drive]

[mike laws]

[Right hand drive]

“Given equal air flow; 85% or less is generally favorable but there are exceptions.”

I have four Demon carbies that can be five v/tb combinations on a 383, all downleg. Advertised venturi and throttle bore:

1) 1.400”v x 1.69”t = 82.8% v/tb
2) 1.425”v x 1.75”t = 81.4% v/tb
3) 1.500”v x 1.75”t = 85.7% v/tb
4) 1.562”v x 1.75”t = 89.2% v/tb
5) 1.590”v x 1.75”t = 90.8% v/tb

#3&#5 are removable venturi sleeves

If none of these combinations are a restriction @6500rpm would it be best to choose the carburetor closest to 85% v/tb for street/strip or would option #1, #2, and #3 be so close it wouldn’t matter? Throw into that mix a #4 with annular?

[BradH]

I have a Gold Claw with the 1.425 venturi sleeves & 1.75 throttle plate. It sucked outta the box, but with a different tune has been a very good carb on my street/strip 440 Mopar. I also tried it with the 1.562 sleeves and the optional annular boosters... not any better on the track and gave up trying to get a better tune for the street and went back to the first configuration. I have the 1.500 sleeves, too, but haven't gotten around to trying them. Sold the 1.562 and 1.59 sleeves, my extra downleg boosters and the annulars since I didn't see any point in going that direction... at least not with those parts.

[Right hand drive]