|
| Date |
10/13/98 |
| Vehicle |
1969 El Camino |
| Engine |
402 cu. in. |
| Induction |
780 cfm carb |
| Test Parameters |
Sound measurement device located 12', 20', 50' in direct line from exhaust outlet. |
|
| |
Key |
| |
(CCI)#3DPC225S, A 3 Disk insert in a 3½" muffler body with 2½" Inlet/outlet |
| |
(A) A leading brand 3 chamber performance muffler |
| |
(B) A "Turbo" style muffler using Stainless packing |
| |
(C) A performance muffler with baffled inner tubes and no packing |
| |
(D) A traditional glass pack |
|
| |
CCI/(A)/(B)/(C)/(D) |
CCI/(A)/(B)/(C)/(D) |
CCI/(A)/(B)/(C)/(D) |
RPM |
12' |
20' |
50' |
IDLE |
66/64/63/61/65 |
64/60/60/59/61 |
57/58/56/54/54 |
1000 |
68/68/66/65/69 |
65/67/64/61/65 |
61/62/58/55/60 |
2000 |
77/76/74/74/75 |
74/73/70/68/72 |
67/67/64/63/66 |
3000 |
86/85/84/85/86 |
82/81/80/80/81 |
75/75/74/75/77 |
| |
|
|
|
| COMMENTS: The Manufacturer A had a deep, hollow tone and weighed 9 lbs. The CC Insert Muffler had a deep, slightly sharper tone and weighed 3 lbs (actual insert only weighed approx 3/4 lb, insert was placed in 2 1/4 lb muffler body for this test.) The Manufacturer B had a very quiet near stock sound and weighed 12 lbs. The Man. C was the quietest and a had a very quiet stock sound and weighed 11 lbs. The Glass Pack was used simply for comparison and had a deep tone. |
|
|
