|
in this April's issue of Import Tuner (yes I know referring to an import magazine on a domestic car forum is a bad idea) They dyno tested and compared stock catalytic converter to a "gutted" stock cat and a test pipe in place of a cat converter the test car was a Miata for each test they did three 4th gear pulls to establish an average baseline. The first run they used the stock cat and ran an average of 104.1HP/92.63TQ second run was the gutted cat and ran an average of 103.0HP/92.1TQ and the third was with the test pipe ran an average of 105.4HP/93.9TQ keep in mind this car is different from ours and all engines run different they didn't state how many miles are on the Miata but I would assume that a high flow cat would make a difference of about +.5HP but I could be wrong. I would also like to see someone do this with 3 Alero's one for each engine size.
__________________
|