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expansion bellows question
Posted: Wed Nov 05, 2008 4:47 am
by jefferson
To my knowledge our exhausts have expansion bellows in the crossover and the uppipe. Would it be worth cutting those out and putting in the braided type of flex joint? My reasoning is the smooth interior walls versus the very broken up bellows. It should flow more and I would think make the turbo spool quicker. Does anyone have any experience or opinions on this?
Jeff
Posted: Wed Nov 05, 2008 6:11 am
by 93forestpearl
Flex joints with an inner braid are an EXTREMELY BAD IDEA before the turbo. I've seen more than one let go of the braid, which makes a mess of your turbine wheel.
You are not loosing as much flow from the flex joint. The gas flowing over it creates a boundary layer on the outside, so it's not that big of a deal. The crush bends in the crossover pipe are more of a restriction. In the end, messing with it is really a waste of your time.
Posted: Sat Nov 08, 2008 2:57 pm
by Legacy777
There is an inner smooth pipe inside of the metal bellows portion, at least on the up-pipe....and I would assume on the crossover pipe too. So it's not an issue.