For starters I know that the peak power that this combo is making is not what the thing is capable of and frankly the guys that posted the video do as well. They are ultimately shooting for 350hp out of the turbocharged Hayabusa motorcycle inline four banger engine. Having seen a bunch of these turbo Hayabusa combos competing in the world of standing mile land speed racing I can tell you as a point of fact that they are amazingly powerful for what they are and they can propel a motorcycle to literally shocking speeds in the standing mile, quarter mile, or whatever distance you want to keep the throttle pinned wide open on. The fun thing about this particular engine is that it is heading into a lightweight, 900lb all wheel drive track day car being built by Palatov Motorsports. Those guys have created some really cool lightweight, stripped down, track day killers and this one with the turbo ‘Busa motor will be the meanest one yet once it is all sorted out. This video shows the engine making 225hp at 10,000 RPM (and sounding good doing it) but ultimately they are hoping for 100+ hp more once the entire package is done. Like any kind of development work, you go at the pace you need to in order to learn and to make sure that you don’t destroy your wallet or too many parts in the process.
Here’s the description from the dyno video:
at George Dean Race Engines. just some initial pulls keeping the boost to 6 psi on pump gas – result is 225 hp at 10K rpm and 131 lb-ft at 7,500 with over 100 lb-ft from 3K rpm. we haven’t done full bore high boost pulls yet as we’re still working on ECU but a quick blip with higher wastegate setting gave 220 hp at 5,700 rpm with 202 lb-ft at that speed and over 140 lb-ft at 4K rpm. we’re shooting for over 350hp on race gas when all done. this will be in a 900 lb AWD car 🙂 should be fun but will require lots of heat shielding.
This engine will end up in a Palatov D4 which looks like this:
So what about making a Hayabusa V8?
I think there is a British company that does just that and if twin turbocharged you could be looking at nearly 700bhp from 2 liters which is awesome to say the least.