- Joined
- Nov 20, 2001
- Messages
- 17,028
- Location
- Ely, England
did my first testing at my favourite riverside spot today after a two year absense!
all i tested was my doma system and at that just the downpipes and the centre section.
the doma goes around to the right of the motor and sat on my shelf for a long periods because initially, it looked like the system wouldn't fit as it wanted to go through my RHS igniition cover.
i managed to elongate the screw holes and rotate both pipes up and over the cover. i was lucky that they were nearly parallel and after a shufty with a bit of pipe that fitted perfectly inside one of the downpipes - da! daaaa! the centre section fits sweet and the tailpipe as well. the centre section turns up the left hand side of the frame so that my old tailpipe still fits with no adjustment required. the centre section misses the frame by 5mm or so.
i left the jetting "as was" and hauled ***. the midrange stomp was a lot better but the top end i couldn't tell due to it being so wet. you could fill it in your arms in second and third gear.
however, when i went from the 400 headers to the 501/550/650 headers the gain was linear all the way up and i expect the same this time!
if this works on a 400 it'll work on anything bigger for sure!
regards
Taffy
all i tested was my doma system and at that just the downpipes and the centre section.
the doma goes around to the right of the motor and sat on my shelf for a long periods because initially, it looked like the system wouldn't fit as it wanted to go through my RHS igniition cover.
i managed to elongate the screw holes and rotate both pipes up and over the cover. i was lucky that they were nearly parallel and after a shufty with a bit of pipe that fitted perfectly inside one of the downpipes - da! daaaa! the centre section fits sweet and the tailpipe as well. the centre section turns up the left hand side of the frame so that my old tailpipe still fits with no adjustment required. the centre section misses the frame by 5mm or so.
i left the jetting "as was" and hauled ***. the midrange stomp was a lot better but the top end i couldn't tell due to it being so wet. you could fill it in your arms in second and third gear.
however, when i went from the 400 headers to the 501/550/650 headers the gain was linear all the way up and i expect the same this time!
if this works on a 400 it'll work on anything bigger for sure!
regards
Taffy
