Troy Patterson wrote:Yap, it's all fuel curve. A small or conventionally sized carburetor in many if not most or even all cases does not allow for a good balance between main jet and high speed air bleed, nor does it allow the possibility of a really good fuel curve.
It's not about cfm, it's about fuel curve and it's about reducing the velocity of the air and fuel exiting the carburetor
Troy Patterson TMPCarbs.net TMP Carbs
Troy Patterson wrote:This is a factory intake manifold and plenum? If so, I doubt the factory missed the mark, but...
Troy Patterson TMPCarbs.com TMP Carbs
In-Tech wrote:MY general "rule of thumb" is 1.5 cu in of plenum vs cu in of engine. That's a good starting point anyway.
What does carb cfm have to do with plenum area?
I'm not sure why people keep claiming a particular size carb is needed for a particular application. It's very hard to find a bolt on carb that will work.
The key is fuel curve. I'm not trying to sell Troy's carbs but I've also found more overall and average hp using as big a carb as possible by fixing the fuel curve. Tuning a carburetor can be just as intense as efi if you have the ability to change the circuits.