to swap back to duel carbs or not

[jbooker82]

When your left cylinder reed is closed...the left carb doesn't pull. That's always 1/2 the time. No matter what the speed. So are you saying that a simple 350cc motor will be faster breathing 1/2 the time through a 28 bore carb vs. 1/2 the time through a 35pwk?

 

So using your school of though then the Single PWK 35mm would have wores bottom end because it would be like running dual PWK 35's since it only breaths once cylinder at a time. This is true acording to your train of though. I havent heard of any one claiming a loss in bottom end with an increase in top end with a 2:1. Most claim a better bottom end with the same or a little better top end over the stock carbs.

 

You could event take this though farther and say that a 2:1 exhaust pipe is just as sweet because it only exhales one cylinder at a time.

 

Here is Snoops Dyno thread where it tested these 3 setups.

 

2:1 carb with a 2:1 exhaust pipe.

2:1 carb with Dual Pro Circuit Exhaust pipes

Dual Mikuni 28mm Flat Slide carbs, and Pro Circuit exhaust pipes.

 

Looks like he has moved the dynosheets so they dont show up in the thread. Maybe he will post them here. His comments about each setup is still there though.

http://bansheehq.com/forums/index.php?showtopic=105993&st=0&p=917668&hl=Dyno&fromsearch=1entry917668

 

josh

[Snopczynski]

The single pwk 35mm setup revs up faster, because its using constant velocity by pulling air through the carb at pretty much all times. It only makes a little bit more power on the bottom though. The 2 into 1 pipe wont speed up acceleration at all. That thing seemed to take forever to wind up, and that was using it with the single carb also. Huge Power difference on the top end though!

 

Single Carb with pro circuits

 

Dual Carbs with Pro Circuits