I thought I'd post up a bit about out latest project. It's to convert a 749/999 road bike into a 999RS replica. Here is the end goal we are aiming for: This won't be a full build thread but rather the occasional update. There is a lot more info on our Facebook page 2motoUK. The project is in its final stages with essentially just the paint work to be yet completed. Short list of specs: Modified tank to get silhouette correct Lengthened swinging arm with quick wheel change conversion 1098 engine with Panigale injection system One off airbox RS frame braces Linear rear suspension rocker RS rearsets Offset adjustable yokes Radial GP fork bottom conversion RS factory radiator set RS factory exhaust adapted to 1098 engine RS rear subframe RS full bodywork
It's because we use the bottom of the tank as the lid for the airbox, so needed a way to mount the injectors.
Yeah I've been using the Panigale system on Franken9 since summer 2016 Bradders but with the OEM 999 air box lid:
Yes, using the standard airbox was definitely one of the key considerations. However, we wanted a larger airbox, and use the same approach as the factory race bikes by using the underside of the tank as the airbox lid. The throttle bodies now sit completely inside the airbox (not just the intake funnels), and this resulted in a airbox volume of over 22 liters. So far, we did an initial dyno session and ended up with 162 rwhp. This is with a completely standard 1098S motor. I am sure there is more to come. 170 at the rear wheel would be nice. Here is the dyno chart:
Eh? 4k to 9k between 100 and 120 Nm. The slight lean out at the end is to be ignored as it's the end of the dyno run before you shut the throttle.
Did you get a baseline of this engine on the same dyno before starting? I ask as those numbers are too high for a standard engine.
No base line for the engine as we bought the engine used. The engine was dialed in properly and it runs a different exhaust, airbox, and intake system, so not incompatible with the curves you posted, airduck. Note how much stronger the torque looks.
Yes, exactly, that's the way the race bikes worked. I allows for bigger airbox which is very much needed with these big twins. Using the 959 injector mounts puts them much closer to the optimum distance to the butterflies compared to when they are located at the top of the plastic airbox lid. The only part we had to design was an adapter plate for the 959 intake funnels to bolt to the 1098 throttle bodies. The 959 funnels have different oval dimensions to the adapter plate has compound curves. Nothing too difficult though. Here is a picture of them. And how they are installed:
If it's too big how can you create the required vacuum to alleviate the under piston pressure in a rev range the engine can handle? I'd wondered what rev range this airbox is designed for?
I understand your skepticism, airduck, but we're confident in the numbers. The dyno place is very reputable, one we used for many years, and does lots of isle of man bikes.
Ready for some track testing next month in Portimao! Can't wait! Unpainted except for tank...just in case!
