Exhaust system tests ?
I checked my back pressure as I have been doing for 20 years and the system checked good. I hold the rpm at 3k and it should read under 1.5 lbs. I found with the turbo system that formula does not work well. I drove my fd with a gage in the 02 sensor port and pushed a midrange ammount of boost and the gage read about 4 psi. I removed the cat and it was busted up inside and restricted. I am thinking the small size of the engine (CC) and a large volume exhaust the cat will check out good using the typical 3k test. Has anyone tested their systems and have some more numbers to share.
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