Quote:
Originally Posted by B1nks
I would like a link showing those gains that BERK received because I was following that and they got something like 13whp from the exhaust but I don't recall them using HFC with it..this exhaust got 20whp without HFC. Also on the BERK video of "prototype #2, which is apparently the same as #3, there is an AWFUL rasp as the exhaust winds down after a rev. People are saying that this rasp is normal when using flex pipes, which is why F.I.'s exhaust doesn't have that annoying rasp. I friend I know said that flex pipes are necessary when you have welds on that first section of piping after the cat(which BERK has) because the welds will crack due to engine tourqe. FI's exhaust appears to be one solid piece of bent piping which will hold up fine. I know this has been discussed but I'm curious if that last part is true !?
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DDM did the dyno's, and he dyno'd the catback with the berk high flow cats already on the car. That was part of the explanation for the lower gains since some of hte restriction of the exhaust was already removed.
Prototype 2 was with the H-pipe, prototype 3 was with the X-pipe if I recall.
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