22 Apr 08, 09:31 pm
I run a cat but no muffler :whistle:
AKMark Wrote:Your engine needs some backpressure to produce torque. Put it on a dyno with no muffler or cat, and your horsepower will be higher, but torque will be pathetic.
Note: I'm doing this with a Diesel, but it's got a turbocharger to give it some backpressure to work against.