seattleswimboy
Member
I reached out to Roland Sands Design about details of their drag bike build. The following is their response.
............................
"Hi Evan,
Attached is a tech sheet with all of the details on the original blue BMW R18 Dragster build RSD X BMW R 18 Dragster - Roland Sands Design. We did just build another orange version of this same bike for a client which is a little bit different in regards to the front forks, rear wheel/tire (full size pro stock slick on beadlock wheel) and we made it chain drive as well. Performance-wise, they both have identical powertrain modifications.
The BMW R18 is very versatile in regards to tuning. The stock ECU and O2 sensor system is able to adapt up to +/-20% so no custom tuning or reflashing of stock ECU was required, even with the custom intake and exhaust mods that we made, it adapted immediately and runs great. This is quite amazing and have never seen this on any other bike ever.
We did dyno the blue bike (naturally aspirated without Nitrous injection) and it made 107 HP / 135 TQ. This is impressive comapared to stock R18 dyno sheets that I have seen online from Cycle World showing about 81 HP/107 TQ. Big gains for just opening up the intake and exhaust!
The biggest concern of this engine making too much power would probably be the clutch, especially since the whole bike has to be disassembled to change it. Our nitrous system is a simple wet system and we only have jetted to add +10-20HP for this reason."
................................
I am blown away by the huge increase in power from such simple mods and NO TUNING! BONKERS!!!!!
............................
"Hi Evan,
Attached is a tech sheet with all of the details on the original blue BMW R18 Dragster build RSD X BMW R 18 Dragster - Roland Sands Design. We did just build another orange version of this same bike for a client which is a little bit different in regards to the front forks, rear wheel/tire (full size pro stock slick on beadlock wheel) and we made it chain drive as well. Performance-wise, they both have identical powertrain modifications.
The BMW R18 is very versatile in regards to tuning. The stock ECU and O2 sensor system is able to adapt up to +/-20% so no custom tuning or reflashing of stock ECU was required, even with the custom intake and exhaust mods that we made, it adapted immediately and runs great. This is quite amazing and have never seen this on any other bike ever.
We did dyno the blue bike (naturally aspirated without Nitrous injection) and it made 107 HP / 135 TQ. This is impressive comapared to stock R18 dyno sheets that I have seen online from Cycle World showing about 81 HP/107 TQ. Big gains for just opening up the intake and exhaust!
The biggest concern of this engine making too much power would probably be the clutch, especially since the whole bike has to be disassembled to change it. Our nitrous system is a simple wet system and we only have jetted to add +10-20HP for this reason."
................................
I am blown away by the huge increase in power from such simple mods and NO TUNING! BONKERS!!!!!