Joined
·
709 Posts
I was taught to vote the straight Republican ticket, to keep my weapon clean, and to always have some inlet tract upstream of the carb.
Unfortunately, when removing the Thrux airbox and installing the K&Ns, which does significantly reduce inlet resistance, you also reduce that upstream tract to zip. When the tract is too short, you can actually burp air/fuel mix out of the carb mouth. A longer tract (inlet bellmouth to inlet valve) also increases the length (and therefore mass) of the entrained airflow, which reduces the inlet pressure pulse amplitude. Think of it as a Slinky. Longer is better, UP TO A POINT!
Couldn't find stacks for the CVKs, so I made a set, complete fabrication instructions are on the 1st pic.

The bellmouth is kept small (which makes less difference than you might think) so that the stacks will fit into K&N pancake filters. Obviously, the stack ID matches that of the carb intake.
http://www.knfilters.com/search/product.aspx?Prod=RC-1900
This is a test fit, the mounting setscrews in the skirt aren't installed yet.

I used solid bar stock, because I had solid bar stock, but I watched the boring bar go back and forth for hours.
McMaster Carr has 6061T6 tube by
the foot, with wall thickness up to .5".
http://www.mcmaster.com/
Type the following page # in the search box, scroll down.
3544
Redhawk
(Y'all pundits, I know it ain't gonna work, will rob 30 HP, and will result in blueing of the passenger footpegs. So humor me.)

Unfortunately, when removing the Thrux airbox and installing the K&Ns, which does significantly reduce inlet resistance, you also reduce that upstream tract to zip. When the tract is too short, you can actually burp air/fuel mix out of the carb mouth. A longer tract (inlet bellmouth to inlet valve) also increases the length (and therefore mass) of the entrained airflow, which reduces the inlet pressure pulse amplitude. Think of it as a Slinky. Longer is better, UP TO A POINT!
Couldn't find stacks for the CVKs, so I made a set, complete fabrication instructions are on the 1st pic.

The bellmouth is kept small (which makes less difference than you might think) so that the stacks will fit into K&N pancake filters. Obviously, the stack ID matches that of the carb intake.
http://www.knfilters.com/search/product.aspx?Prod=RC-1900
This is a test fit, the mounting setscrews in the skirt aren't installed yet.

I used solid bar stock, because I had solid bar stock, but I watched the boring bar go back and forth for hours.
McMaster Carr has 6061T6 tube by
the foot, with wall thickness up to .5".
http://www.mcmaster.com/
Type the following page # in the search box, scroll down.
3544
Redhawk
(Y'all pundits, I know it ain't gonna work, will rob 30 HP, and will result in blueing of the passenger footpegs. So humor me.)