> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of
> JAMEPC@aol.com
> I know some people use 2.5" pipes when doing true duals but
> accoring to the
> formula for the area of a circle, 3.14 (pi)xR(radius)xR, you get
> 9.82 square
> inches of area with (2) 2.5" pipes, which is more than a single
> 3.5" pipe.
> A single 3" pipe has 7.07 sq. in. Wouldn't it be better to use (2) 2.25"
> pipes (area = 7.96 sq. in.) to keep some low end? This would be
> for a 300HP
> 318.
> Thanks,
> James
Yeah, but believe me, a single 3" is adequate for a 300 hp 318 at 6000 rpm.
And it weighs less. Remember also, any locally fabricated true duals would
likely have compression bends rather than mandrel bends so you will lose
some volume there. For that reason, if going to true duals, the 2.5" would
probably be better.
RayB
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:13 EST