Anyone got chart on Dyno for cobra pipes?

[BigBF]

Hello everyone, 
Anyone got chart on Dyno test stock pipes and cobra pipes that was reported cobra pipes loss 8 hp?
It was like 20 years ago...
Thanks.

[98valk]

this is all I got. as u know the tech archive board is gone.

http://www.valkyrieforum.com/forum/tech_archive.cgi?read=969520

This was posted by J. Orr, 3/27/1998, on the GWRRA BBS, valkyrie section.
The following mods were done by Marc the owner of Factory Pro on a valkyrie that had cobra 6x6 pipes.
K&N filter (w/o prefilter)
Air box mod (remove plastic welded baffle)
38 pilot jet
3.5 turns idle mixture screw
front needles set on #3
mid and rear needles set on #2
115 main jets all carbs
this picked up 5 hp over the base run with the cobras.

this HP is still down from the stock pipes or almost the same.

[blackbird239]

I took my 2003 Valkyrie to the Delmarva Bikefest 3 years ago with Cobra pipes on. It registered 90 HP at the rear wheel, 89 ft lbs torque. The next year I went back to the same DYNO . This time I had the stock pipes. This time 92 HP and 90 ft lbs. Both times fresh synthetic Honda oil. I also use E3 plugs.  The first time the bike had around 45,000 miles. I just love it.