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Old 10-11-2015, 08:55 PM   #24
dmir55
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Join Date: Jul 2014
Location: northern Minnesota
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Default Re: Merge collectors

I tied a set of headers together on Line's dyno and picked up five foot pounds of torque with no other changes. A two into one set up. Back to Jack Davis, he told me he made a set of two into one collectors for a NASCAR team. When they ran their car at Michigan the car was so much faster that Nascar banned the two into one set up. Hence they went to the "X" pipe. All we are trying to do is to keep fifteen pounds of atmospheric pressure from running back up the pipes. The fewer openings you have for the exhaust pulses to exit the better headers and collectors will work. Just think of how small that exhaust pulse is at six to eight thousand or more r.p.m.
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