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Old 09-17-2002, 03:30 PM
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Post Exhaust Balance Tubes

It has been suggested that using an "H" pipe AKA balance tube will increase low RPM torque. Is this true ? How does it work ? Will it help with a 400 HP SBC Street engine with Headers and a dual exhaust ? Thanks for the help.


Joe
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Old 09-18-2002, 04:31 AM
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The theory on balance tubes is basic scavenge of opposite sides.
Left bank fires, right bank scavenges, and visa-a-versa. The scavenge side having a lower pressure, will prepare the left bank to fire into a decrease pressure in the left side exhaust system.As the right side bank fires it draws the exhaust and pressure out of the left side.Some say this helps reload the combustion chamber when the valve opens. I do beleive this works. I have heard that the"X" style exhaust is better than the "H" design at scavenging.We there you have it. This is the basic theroy that i was taught in Jet Mech School.
Hope this is of some help to you. You other guys kick in your thoughts.
Slider in Wa.
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Old 09-18-2002, 11:04 AM
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Thanks for the Help Slider !!

Joe
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Old 09-18-2002, 12:09 PM
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the x pipe design is far supperior to the h-pipe design, and the x-pipe has that nascar sound at high rpm (try to get a look at the bottom of a nascar next time you see a flip on ESPN, they use x pipes) but the h.pipe is a lot easier to retrofit, and possition correctly,

just spray some non high temp on your pipes from the flexplate and about 3 feet aft, take a brisk drive and crawl down and see where the paint burns off first, that will be where the pressure wawe is highest, thus the highest temp, and that is where you want your equaling tube.

piece of cake
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