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Message: [QUOTE="BBottoms, post: 43527, member: 1421"] TomS, I never took into account possible exhaust back pressure, but I also [B]personally[/B] haven't seen any leaks (other than my oil cooler, which has been leaking for a while, but doesn't appear to be leaking anymore than usual) since I ran the vent to the exhaust. Did the guys who developed leaks have factory exhaust and mild tunes, or 4" and big performance mods? Since 300hp or 450hp seem to be roughly the performance limits of a 3" or 4" exhaust, I assume the back pressures are negligible unless you are pushing these limits, with the possible exception of doing something like sled pulling where there is a 110% load. Did the guy that did the testing on the Racor unit ever test it with the vent plumbed into the exhaust? I see he mentions it at the end, but doesn't have any numbers. [/QUOTE]

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