Has anybody put a Road ish, Comet on a Dyno', I would be interested in knowing how long the silencer should come out the back.
I proved many years ago with my Blue Twin, That it can make a lot of difference.
On a 1/4 mile sprint, I had 2 pipes ending at the rear wheel spindle, Brother Ron welded 2 . 6" extensions,
It ADDED a second to my times, I then sawed 3" off each pipe, Got half a second back !, Then went back to the Wheel spindle and got my times back to normal.
I have seen silencers ending in line with the wheel rim and some the back edge of the tyre.
I have seen a photo of John E. Of fork Fame, With his sticking out the back a lot more !!.
I think, There is Power to be found or lost !!, Just because of a few inches, But it must look right for the Road !,
So no silly short pipes that some used in Racing many years ago.
Cheers Bill.
I proved many years ago with my Blue Twin, That it can make a lot of difference.
On a 1/4 mile sprint, I had 2 pipes ending at the rear wheel spindle, Brother Ron welded 2 . 6" extensions,
It ADDED a second to my times, I then sawed 3" off each pipe, Got half a second back !, Then went back to the Wheel spindle and got my times back to normal.
I have seen silencers ending in line with the wheel rim and some the back edge of the tyre.
I have seen a photo of John E. Of fork Fame, With his sticking out the back a lot more !!.
I think, There is Power to be found or lost !!, Just because of a few inches, But it must look right for the Road !,
So no silly short pipes that some used in Racing many years ago.
Cheers Bill.