BSA Owners' Club Forum

The BSA Workshop => Twins => Topic started by: bikerbob on 12 July, 2017, 13:09:30

Title: Exhaust pipes
Post by: bikerbob on 12 July, 2017, 13:09:30
Is there an optimum distance for how far the exhaust pipes go into the silencers on a 1956 swinging arm A7 mine go in approx 4 inches which seems quite a bit or does it not make any difference to performance.
Title: Re: Exhaust pipes
Post by: STAR TWIN on 15 July, 2017, 06:23:59
With a normal setup I don't think it will make any difference. For information on optimal exhaust lengths, read Tuning for Speed. Only applies to unsilenced exhausts though. For the curious, a Velocette goes better with a fishtail silencer than without.