Stage 1 Air Cleaner ???
#31
RE: Stage 1 Air Cleaner ???
ORIGINAL: glens
48in³ × 1/revolution × 6000revolutions/minute = 288000in³/minute (÷ 1728in³/ft³ = 167ft³/minute)
167ft³/minute on average at 6000 rpm (6500 rpm = 180ft³/minute). The instantaneous velocities are a bit higher, I'd imagine, but don't feel like doing the math...
48in³ × 1/revolution × 6000revolutions/minute = 288000in³/minute (÷ 1728in³/ft³ = 167ft³/minute)
167ft³/minute on average at 6000 rpm (6500 rpm = 180ft³/minute). The instantaneous velocities are a bit higher, I'd imagine, but don't feel like doing the math...
Simpler just to go here & use their calculator...
http://www.4secondsflat.com/Carb_CFM_Calculator.html
#33
RE: Stage 1 Air Cleaner ???
I haven't reviewed what I'd "penned" just now but I'm pretty sure I mentioned at least once that pertinent factors were left out of the cipherin'. The relationships remain the same, however, and that was my point. If you want to use a VE factor, hit the result with ×0.9 or whatever factor is pertinent.
That web-page calculator merely does what I did (plug my figures in and see). I personally don't see it as being any easier than my HP calculator, but thanks for bringing it to our attention anyway. I thought I read everything they had to say on the page but didn't notice any terms like "average" or "peak" being mentioned. For the same average CFM two engines of the same displacement will have markedly different peak flow requirements if one is undersquare and the other oversquare.
I'll go back to that page in a minute and have a look at their javascript coding. If I see anything different in their math (apart from the aforementioned VE factoring) I'll come back and comment on it.
That web-page calculator merely does what I did (plug my figures in and see). I personally don't see it as being any easier than my HP calculator, but thanks for bringing it to our attention anyway. I thought I read everything they had to say on the page but didn't notice any terms like "average" or "peak" being mentioned. For the same average CFM two engines of the same displacement will have markedly different peak flow requirements if one is undersquare and the other oversquare.
I'll go back to that page in a minute and have a look at their javascript coding. If I see anything different in their math (apart from the aforementioned VE factoring) I'll come back and comment on it.
#38
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