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4G13 air flow volume

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Posted 23 December 2007 - 12:42 PM



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Appreciate if anyone can give me an info about the exact amount of air
(cfm) entering the 4G13 injection factory engine.


Posted 14 April 2008 - 11:59 AM


    Road Warrior

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Theoritically, it can be calculated like this:

There are 4 cylinders, intake stroke of all 4 cylinder will be completed
every 2 cycles.

Thus at 6000rpm, meaning 6000 cycles per minute, all 4 cylinders will
completed 1298cc (1.298Litre) suction 3000 times, which is 1.298 x 3000 =
3894 litre / minute


Posted 16 April 2008 - 04:14 AM


    Hot Rod

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You need to take the volumetric efficiency into consideration.

Make it estimately 85%, the ingested volume is only 0.85x3894 = 3310 L/min

However, the proper way is to use an Air flow meter to measure the actual
volume and calculate back the V.E.