Reply to "What is the point of 180 headers?"

From my drag racing experience with headers the length of the primary tubesand the length of the collector both have impact on low end torque and top end speed. Adjusting these accordingly for your application will yield and increase in desired performance. Also the cross over tube ... which in 180's equalizes the back pressure and produces performance also .. basically one v8 in comparison to 2 I4's. The data I compiled was on my 428 CJ Comet I shortened the primarys ..by running with no collector ..and putting a piece of tape along the side making one pass ..where the tape burned I cut them off ... the slipped on the collectors and repeaded ... then cut the collector. The perfromance was increased and picked up 4 tenths in the 1/4 ..not sure though technically .. what the reason was where the taped burned off ?

Later on I welded in a cross over tube and it added to my top end power and added mph in the 1/4 mile.... I didnt get to alter the location on the collector to see the difference.

Ron