Reply to "Cold air intake…. I am going down!!!!!"

LeMans850iMember

I have a 750 CFM demon carburetor… Each Venturi has a diameter a bit less of 36 mm

That equals 1018 mm2 multiplied with 4 =4072mm2 - that is the smallest part of the whole intake system… (that equals to a hole of 72 mm diameter)

3.5” (88.9mm) tube = 6207mm2

4” (101.6mm) tube = 8107mm2

I think by having twice the volume that this should easily accounted for boundary layers and friction losses… at least for the tubing portion… (over 1/2” spare all the way around)

Going bigger shouldn’t do any thing..

(sorry for running in metric, but I can visualize that)

3/31/257:28 AM

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