Nitrous Oxide on a late-model sportbike.

I for one appreciate Motorheads methods. What little HP I make is earned, I do not like to take the easy way and buy it. I look forward to Motorheads posts as much as any because HE MAKES ME THINK! I don't even have a Hayabusa, or a fuel injected bike for that matter, but everything that is discussed here applies whether it's directly or indirectly. I will never make the most HP in similar applications, but I will listen to the guys that do. If they tell things staight up then that's good. If they are vague about things and I pick it up, then that is the ultimate. Read between the lines, the info is there. If I end up not being able to figure something out, I'll ASK. It costs nothing, and nothing ventured is nothing gained. I do not look down on anyone who does things differently than me, I just prefer my way of finding things out. The next time, I may not HAVE to ask. You are always learning in this sport, regardless of who you are.
 
Motor,


"solid state mosfet style relays like what you find inside the top of your stock stick coils"

I agree with the mechanical relay response times. The fastest I have found are 6ms on, 3ms off time, rated for 15A. Obviously the solid states are faster, but handle less current usually.

Also grounding the coils like MPS does does NOT fire them, the field collapses when the current is REMOVED, discharging across the secondary winding. Remember the old "points" setup, plugs fired when the points OPENED.

But I didn't know the stick coils had solid state relays in them???

GAS

The busa uses "batch" mode to start up only. After that it switches to sequential, injecting before the intake opens, if I remember right. It is in the service manual, they give a nice timing diagram, and theory of operation info.

Dave

[This message has been edited by DaveO (edited 06 April 2000).]
 
MOTOR,

Those spec are straight from CDE databook. CDR93 automotive series. They list no spec concerning coil saturation. The 6ms on, 3ms off are typical specs. How does the saturation effect the response time? I can fax you the datasheets if you want. Let me know.

Dave

[This message has been edited by DaveO (edited 06 April 2000).]
 
Just wondering if anyone has tried a dry Nos system on their fuel injected bike? I know it helped eliminate back firing problems on fuel injected cars, wondering if it would help on the bikes as well?
 
This type of system works well on cars because they share a common throttle body for all of the cylinder. On a bike's 4 insuring equal distrubition per cylinder. Sure you could flood the air box with N2O on a bike ( I wouldnt) and gain some horsepower but the risks would far outweigh the benefit. Cars also enrich the fuel through raising the fuel pressure to the injectors when the system is activated. Good idea though. May work in the future with 4 Nitros only Nozzels When Motorcycle fuel injection systems are as sopisticated as cars. Now that F.I. Bikes are becoming the rage, I would expect the aftermarket to get on the ball and offer some M C specific parts aimed at this! Brian
 
OK Ive got a question.. maybe it was already said..I dunno..
Dont the coils on a bike fire at the top of every stroke??? I know some vehicles do...

if valve timing was off a little, wouldnt that explain(atleast in somecases) the back fires???
 
Jason, the Busa has 4 indivual coils so they do not have a wasted spark. Bikes that have 2 coils (that share cylinders) fire EVERY stroke, so they have 1 spark when they need it and 1 spark when they don't (on the exhaust stroke)
 
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