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Old 12-26-2020, 03:14 PM   #472
SkinnyG
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Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,189
Re: Starting 1966 Factory Short Bed Build, Bagged, 383 Stroker and Muncie M20 4-Speed

This is what I did:

Trapezoid inside dimensions

((a+b)/2)x(h)x(w)

((6.5 + 2.5)/2)x(14.5)x(48.5) /12/12/12

1.83 ft3

/2

0.9ft3

3x2.75x20 /12/12/12 (rough estimate of port area)

0.1ft3

sub: 0.05ft3 (typical)

0.9-0.1-0.05 = 0.75ft3 - but actually slightly smaller because I didn't take into account the separator board in the middle.

I ran both volumes through WinISD and there isn't a massive difference between the two. It will work. At .75 the box is tuned a few Hz higher.
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS
1977 Silverado: Shortboxed & dropped, potato-potato
V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag
Lotus Super 7 Replica: Scratch-built street-legal rollerskate
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