How does altitude change header pipe diameter needs?
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Location: Salt Lake City, Utah
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I'm putting an LS-1 in an RX-7. There are two headers that fit and one has 1 3/4 primaries and the other has 1 7/8 primaries. I know that as altitude increases, it has an effect but is it bigger? Smaller with higher is my guess but I'm far from sure. The particulars for my application follow; Stock 346 with a small cam (TR 224), with headers for starting but later to add better heads and intake. Any help is appreciated. Oh yea, I live at about 5000ft.
Stan
Stan
Last edited by clubber; 03-29-2007 at 02:19 PM.