Hi Guys, We realise that info on the 865cc Speedmaster`s performance capabilities have been very limited to say the least. After a lot of time and effort we can now show you some of our results. PLEASE understand that this is very much a work in progress scenario and are reported here just as we have found them. We plan to test the camshafts on the 790cc when time allows.
Before any fine tuning has been completed our results for today are.(all figures rwbhp)
865cc Speedmaster;
Stock. 52
Stock with our pipes only. 56
Flowed and modified ports, increased c.r. only, std. pipes 58
Flowed and modified ports, increased c.r., cams, std. pipes. 64
Flowed and modified ports, increased c.r., cams, std. pipes, snorkel removed. 66
Flowed and modified ports, increased c.r., cams, T.bike pipes, snorkel fitted, std. jetting. 72
Flowed and modified ports, increased c.r., cams, T.bike pipes, snorkel removed, std. jetting (too lean). 72
Flowed and modified ports, increased c.r., cams, T.bike pipes, snorkel removed, 125 mains. 73
Flowed and modified ports, increased c.r., cams, T.bike pipes, snorkel and air filter removed, 140 mains. 74
With the Thunderbike pipes fitted only, the torque increases throughout the rev range but the breathless nature of the motor at higher rpm means the improvements do not translate into a significantly higher bhp figure.
More work is required and will be carried out over the next week or so. The torque output has grown significantly and is very flat with no problems at all, we are very pleased with results so far.
I hope this provides some food for thought and some discussion amongst you guys. We haven`t as yet dynoed a std. bike with Tbike pipes with the snorkel removed - hopefully soon though.
Cheers
Graeme
www.Thunderbike.co.nz
