| 摘要 |
A tuned exhaust manifold (10) is provided for attachment to an engine having a plurality of exhaust ports. The manifold (10) includes an inner (12) and outer (14) shell joined together to form an exhaust chamber (26) and an inwardly-opening flange-receiving space (70) at a split line (16) defined by the union of the inner and outer shells (12, 14). Captive tuning baffles (80, 82, 84) are dropped in place and positioned in the exhaust chamber (26) to isolate individual engine exhaust ports for engine performance tuning. Each baffle includes a flange (86) trapped in the space (70) between the inner and outer shells (12, 14) to retain the baffle in a predetermined position within the exhaust chamber (26). The baffles (80, 82, 84) are arranged in a predetermined pattern within the exhaust manifold (10) to define separate passageways extending from exhaust inlet openings (36) formed in the inner shell (12) toward one or more exhaust openings (68, 74) of the manifold (10). Tuning is accomplished by configuring and placing the baffles (80, 82, 84) to control the flow of exhaust from each engine exhaust port through the exhaust manifold (10). A method of assembling the captive tuning baffles between the inner and outer shells is also provided. |
