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**First c10** · 05-28-2015, 06:10 PM

OK so.....
This is what my mind comes up with(based on the above chart)
2.5 pipe = an area of .034ft2 at 509cfm = 14970.6 ft/min or 249.5 fps

3.0 pipe = an area of .049ft2 at 747cfm = 15244.9 ft/min or 237.4 fps

So bigger pipe more cfm but less velocity. 5% less velocity in the 3" then the 2.5"
now that we have had an algebra lesson.....it all comes down to sound! What to you guys think it will sound like? good or bad?

05-28-2015, 06:10 PM	#10
First c10 Registered User Join Date: Dec 2012 Location: Los Banos CA Posts: 2,705	Re: Project 68 k10 LWB..aka "The Hulk" OK so..... This is what my mind comes up with(based on the above chart) 2.5 pipe = an area of .034ft2 at 509cfm = 14970.6 ft/min or 249.5 fps 3.0 pipe = an area of .049ft2 at 747cfm = 15244.9 ft/min or 237.4 fps So bigger pipe more cfm but less velocity. 5% less velocity in the 3" then the 2.5" now that we have had an algebra lesson.....it all comes down to sound! What to you guys think it will sound like? good or bad? __________________ 1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR SOLD GO GO!!!