all I knew was to get a carb for mine at least 650 cfm, what does the cfm mean?
2007-03-11 15:58:46 · 7 answers · asked by wheels47012 3 in Cars & Transportation ➔ Maintenance & Repairs
cubic feet per minute
2007-03-11 16:02:41 · answer #1 · answered by FORK 3 · 3⤊ 0⤋
Cubic feet per minute = CFM
Carburetors are air fuel mixing devices. The more air that can be mixed with fuel at optimum ratio for the operation of the engine the more power that engine can produce but it must be matched to the air flow needs of the engine. A carburetor that has a far greater capacity than the needs of the engine will not make the engine produce more power and may not operate at peak efficiency because the engine never utilizes the flow rate at which it works best. A too low carburetor flow
rate capacity will reduce the engine power or may not allow it to run at any usable level.
Back in carburetor glory days twin or multiple carburetors were common and the synchronization of these was done by balancing air flow using CFM measuring devices.
2007-03-11 23:31:21 · answer #2 · answered by C. M. R 2 · 0⤊ 0⤋
CFM does mean Cubic Feet Per minute...meaning that during a minute of wide-open trottle, theoretically your 650 carb would cram six hundred and fifty cubic feet of air into the engine. More air generally means more power...but the air/fuel mixture still has to be correct. At the same time, a 1050cfm carburetor won't do you any good if you've got a 2" stock exhaust system...the new air can't get in if the old air can't get out first.
2007-03-11 23:12:37 · answer #3 · answered by chevytuf76 2 · 0⤊ 1⤋
CFM: cubic feet per minute. This is the volume of air that can efficiently pass through the carburettor's throat. Calculate the volume of air each cylinder can suck on each intake stroke. Multiply this by the number of cylinders, then by the maximum rpm of the engine divided by 2 (since it only sucks air in on every second revolution), and this is the volume of air that the engine needs to be able to draw through the carburettor.
2007-03-11 23:32:29 · answer #4 · answered by Me 6 · 0⤊ 0⤋
cubic feet per minute......for example....your,s will deliver 650 cubic feet of air/fuel mixture per minute............more of a high performance issue.......a large displacement engine need,s more c,f,m. @ 5000 r.p.m. than would a small displacement engine..............sort of a breathing factor.......a lesser c,f,m. carb. would lean out at high r.p.m.......causing the engine to starve for fuel.........meaning less power!
2007-03-11 23:15:41 · answer #5 · answered by slipstream 7 · 0⤊ 0⤋
cubic feet per minute. It's the volume ther carb can handle.
2007-03-11 23:02:51 · answer #6 · answered by Fordman 7 · 3⤊ 1⤋
it simply stands for cubic feet per minute ,its the measurement of how much volume the carburetor can handle,good luck.
2007-03-11 23:07:16 · answer #7 · answered by dodge man 7 · 0⤊ 1⤋