Constricted Header Collector? - ZR-1 Net Registry Forums

todesengel · 04-26-2010

I would also like to add that I do not buy magnaflows response to a restriction towards the tail end of the exhaust. It just seems contrary to theory.

First ask yourself what happens when exhaust gases cool, they expand. With expansion of gases it slows and requires more area to evacuate. For this reason you see a lot of people run 2.25"-2.50" headers which dump into a larger system down the line and/or a exhaust system that "megaphones" towards the tail end to compensate for the expansion of these gases as they cool. For this reason, imho, it would seem "better" to have a restriction on the front end, where the gases are still hot, than the back end. The "better" solution, again imho, is to have a consistent system OR one that expands to take into account the expansion of gases, OR the best solution which would be a system that is coated, or wrapped, to limit gas expansion AND enlarges towards the discharge.

04-26-2010	#8
todesengel Join Date: Apr 2010 Location: O'Fallon, Mo Posts: 733	Re: Constricted Header Collector? I would also like to add that I do not buy magnaflows response to a restriction towards the tail end of the exhaust. It just seems contrary to theory. First ask yourself what happens when exhaust gases cool, they expand. With expansion of gases it slows and requires more area to evacuate. For this reason you see a lot of people run 2.25"-2.50" headers which dump into a larger system down the line and/or a exhaust system that "megaphones" towards the tail end to compensate for the expansion of these gases as they cool. For this reason, imho, it would seem "better" to have a restriction on the front end, where the gases are still hot, than the back end. The "better" solution, again imho, is to have a consistent system OR one that expands to take into account the expansion of gases, OR the best solution which would be a system that is coated, or wrapped, to limit gas expansion AND enlarges towards the discharge.