Discussion in 'Touring Models' started by anjumkha, Apr 27, 2011.
What is the purpose of the cross over pipe?
As far as I can tell, it is to increase overall exhaust flow velocity, improving the scavenging (emptying) of the contents of each cylinder during its exhaust stroke, with the inertia of exhaust gasses from one cylinder being able to draw/suck on the other cyclinder's exhaust port, helping it empty more quickly and completely.
Exactly RibEye, Helps balance system to pull more spent gases out of cylinders.
It sounds right, except that you can not draw exhaust from the other cylinder on it's compression stroke. It was my understanding that the crossover allowed pressure wave build up, a low pressure escape path to flow into, allowing for better flow over all and better cylinder scavenge. The MoCo may test the exhaust for the location of pressure points in determining where the co pipe should go.
If you are really interested check out RB racing's website. They go into great detail to explain this. Sounds pretty intense the lengths they go through to figure it all out.
I just went from tru-duals back to a stock header. I was looking for more torque. (went with Jack Pot Dyno Tuned mufflers) Seems to have helped.
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