QUESTION FOR THE SITE MODERATOR:
Why and who left this Reputation Recieved on my account ?
"Latest Reputation Received
Thread: Almost Completed The...
Date: 03-31-2007 11:10 AM
Comment: ignorant remark
Here's what I posted to deserve being called ignorant:
Now that's some terrible math.
dual carbs are 30mm each and that totals 60mm, the largest single i have found is 42 and 18 more mm is big time hp increase thru out the entire power range.
It's the area that matters.
A 30 mm carb has an area of (Pi * 15 mm^2) = 706.9 mm^2
Two 30 mm carbs have an area of (2 * 706.9 mm^2) = 1413.8 mm^2
A 42 mm carb has an area of (Pi * 21 mm^2) = 1385.4 mm^2
So you can see that the dual carbs do have a larger area, but more importantly, they have different flow characteristics (smoother).
You can't just add two diameters from two smaller carbs and compare with a larger diameter carb.
What's that all about ?!
Now I ask you, was my comment really that ignorant?
I think someone got their feelings hurt over nothing.
I'm a 39 yr. old mechanical engineer at a nuclear power plant.
Fluid dynamics is one of my areas of interest and though I make no claim to be an authority on the subject, I reserve the right to critique elementary math statements.
Furthermore, the smaller diameter primary carb has a higher velocity flow, when compared to a larger single carb, to fill the same cylinder volume. It's just a superior design that was obsoleted because it was more expensive to produce and more complex to set up and maintain.
Having said that, here's some interesting Honda
information on why they chose to develop the dual carb set-up.