Ebay/OBX style header install w/plenty of PICS (LONG, but detailed)
11-01-2009, 09:56 PM
#22
Now that I know these are 1 5/8" headers, time for me to upgrade. I always ASSUMED they were 1 3/4" primaries. Now I have the truth. Time to hunt down a set of 1 7/8" headers. I'm calling stainless works in the morning to see how their 1 7/8" headers are coming along.
11-02-2009, 04:55 PM
#24
I have no idea what that webpage is trying to say, cause primary tube sizes have always been called out in i.d. of the tube, not o.d. Hell, they're even trying to say to use 1-1/2"(!!!!) primaries for a 300hp 350.
Think about it. How do you have a constant measuring stick across the spectrum of various header manufacturers if everyone uses a different thickness material for their tubing. Sure two companies may have the same o.d. of 1-3/4" but if the material thickness is different between them, then the i.d. will be different and the subsequent performance between them if used on the same engine will be varied.
Long story short, primary tube sizing is supposed to be the i.d. of the tube.
Think about it. How do you have a constant measuring stick across the spectrum of various header manufacturers if everyone uses a different thickness material for their tubing. Sure two companies may have the same o.d. of 1-3/4" but if the material thickness is different between them, then the i.d. will be different and the subsequent performance between them if used on the same engine will be varied.
Long story short, primary tube sizing is supposed to be the i.d. of the tube.
11-13-2009, 02:10 AM
#29
yea thanks guys, i found it with some more searching. got another question tho, anybody happen to have these with aftermarket wires? ive got some taylors and i know there longer, just dont rem how much longer and wondered if maybe long enough to go over the hump on #5 instead of having to make straps..?