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Hi ! Here in Germany is a rumor , that if You apply on the conector B 17 ( LIGHT GREY ) 12Volt maybe from the source B20 , Your revlimit will be 13200rpm and the fuel enrichment will be 4 % higher . This should be for the Superstock Series here in Europe . Does anybody know exactly more about this ? Sorry for my bad english ! Regards Harald !
 

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I've been following developments on the 954 pretty closely over the last couple of years, howie, and this is the very first time I've heard of this. It certainly hasn't been mentioned anywhere here at FireBlades.org, that I can remember.

Would you be willing to try this on your own bike, without at least several trustworthy mechanics first assuring you that it is safe to do? Why would you take the word of anyone on an Internet forum, for that matter? You'd be asking your 954 to rev some 800 rpm beyond it's current maximum limit, and presumably outside its design specs. Not good! :nono:

Without additional head and valve work, and probably a different cam profile, you might not realize any benefit from extending the rev limiter in any case, because the power begins to tail off sharply at about 12000 rpm anyway.
Leave it to the racers to experiment for when it really matters. On the street, why would you need to do this? :idunno:
 

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Please try then let us Know :hyper: Actually it sounds plauseable, but if it was the case someone on the forum probalbly would have heard about it by now? weather you want to take the risk and try it on your own bike is something you will have to decide for yourself :idunno: If it was to work the occasional blast to 13k shouldnt really harm your engine as the STD limit would have been set conservatively, (its not like the factory set it at 12,200 or 12,400 or whatever and it then self destructs at 12,500) Motopower in the UK built a 178 rwhp blade that revs to 15,000rpm without a problem it uses std crank, rods and pistons although they run a slightly looser clearance on the centre main bearings to free it up a little, now before anyone flames me on this, Im not saying that without mods it would be safe to run a std 954 this high, but I believe 13k would be well within its limits! If you had a full system, bigger cams, bumped up compression (and throw in some shorter velocity stacks for good measure as these would complement this High rpm configuration) and a properly mapped PC3R you could well make use of some extra RPM and gain a size chunk of HP (maybe 160ish rwhp :eyebrows: )
Now before anyone asks do you really need all this extra power on the street, first go and ask everyone who is going to by any of the new 04 models this same question!
 

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Wait just a minute guys. The 954 isnt going to benefit 1 shred from revving it to the moon because they have reached peak power before 12k. You probably wouldnt hurt it to take it to 13k in short blast but it would slow the bike down something fierce. You would have to add alot of breathing to the bike to get it to where it makes power up that high. Bigger valves, ported heads, and alot more duration on the cams.
 

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My 03 model stock would peak out below the rev limiter.
SHE NOW HAS:vstacks, serpent exhaust, K&N, pc3r. and the biggest change was the pull to rev limit.
I would love to see 600 rpm more.

Just my 2 cents :patriot:

QUOTE "Now before anyone asks do you really need all this extra power on the street, first go and ask everyone who is going to buy any of the new 04 models this same question!"

Right on!!
 

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FullForce said:
Wait just a minute guys. The 954 isnt going to benefit 1 shred from revving it to the moon because they have reached peak power before 12k. You probably wouldnt hurt it to take it to 13k in short blast but it would slow the bike down something fierce. You would have to add alot of breathing to the bike to get it to where it makes power up that high. Bigger valves, ported heads, and alot more duration on the cams.
Read the above post! Also there are times when your blasting through the twisties and between two corners you need just a little more yet its not feasable to change up only to have to instantly change down again! in these situations a little more over rev can be quite handy.
 

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Paul Armstrong said:
"Now before anyone asks do you really need all this extra power on the street, first go and ask everyone who is going to buy any of the new 04 models this same question!"
Right on!!
:rotfl: Good point :rotfl:
 

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Ok, Im just going to have to disagree. There is just no need to put that bike in that RPM range where its down on power IMO.
 

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FullForce said:
Ok, Im just going to have to disagree. There is just no need to put that bike in that RPM range where its down on power IMO.
On the track it is very useful, even if you're not in the fat part of the torque curve, a bit of overrev is helpful. We don't know what Howie is doing with his bike, so we can't assume it's street only.

As far as who needs more power, that question is just ridiculous on a board where most of us own open class sportbikes.
 

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I would pay through the nose for an extra 500 RPM in at least 2 places at Grattan. I wouldn't care if it was just free spin as long as it doesn't start going backwards (what happens when you hit the limiter). You get spoiled on 2 strokes, because if you jet them correctly, you can usually find at least 1K of over-rev, the only penalty being crank life and if you are meticulous about maintenance, it's a non-issue.
 

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abtech said:
I would pay through the nose for an extra 500 RPM in at least 2 places at Grattan. I wouldn't care if it was just free spin as long as it doesn't start going backwards (what happens when you hit the limiter). You get spoiled on 2 strokes, because if you jet them correctly, you can usually find at least 1K of over-rev, the only penalty being crank life and if you are meticulous about maintenance, it's a non-issue.
Good point, Ab! it's like the section of track between turns 4 and 5 at Willow--some of the faster guys can grab a gear going downhill, then shift back before turning inot 5 (an off camber, downhill left hander)--I like to keep it in third and use the over-rev to get me through 5 (on my highly-modded TL1000R, I removed the first "soft" limiter, extending the rev range by about 500 rpm)...
 

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For holding a gear longer alone it would be worth it, but does anyone know what the actual flow restriction would be at 12.5+k?

It could be intake track and/or intake velocity stacks/air box, intake ports on the head, exhaust ports on the head, header, or vavles and/or cam (but I doubt it), or more than one.

Most of the graphs I see of full systems and tuning, the hp does not start to drop off (unlike stock). Maybe without other mods the hp would at the very least stay the same till 13.5k, in which case when you go to the next gear you would start at a higher hp level than before.
 

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FullForce said:
Ok, Im just going to have to disagree. There is just no need to put that bike in that RPM range where its down on power IMO.

You really r a misguided 1.

Maybe a SCOOTER is really what you would feel more at home with!! :rotfl:
 

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An extra 800RPM is worth having if the bike is tuned to cope with it. I guess that would mean a blueprinted crank, gas flowed head and higher lift cams. Probably a full system too.

If you look at torque and power curves over the last ten years, all the manufacturers have really done is increase revs to increase power.
 

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There might well be some truth in a variation of what Howie has been told , but as it is, this sounds a bit fishy to me.

Where is the light grey lead? The only pure grey lead I can see on the whole wiring diagram is the turn signal Negative. I have a Euro spec bike.

Applying voltages to unspecified bits of your bike on the strength of rumours alone could be risky. You could damage something sensitive, maybe blow a fuse. Who knows, your indicators might start flashing :D
 

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It is very possible that there is a subtle mod like this on the bike somewhere, Cars have been doing it for years, with earthing wires on ecu's to richen up the bottom end of the rev range. I have also seen ignition maps changed by extra voltage feeds or connecting wires together.

sean
 

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This mod is working for about 5 months on my '03 954. With a little switch
under the seat, i can test the whole thing. The sound of the bike is more
aggresive but it needs a new map after 11500 rpms (and maybe some other mods....). The bike has 5.5% more speed in every gear but without remapping, the power drops quickly after 11700. Sorry for my bad english..
 

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Hey swtos, can you please confirm exactly which pins are used in this mod as I looked in my wiring diagram and also cannot determine which pin this would be?
On the ECU there is 2x26 pin plug connectors (A and B) and on connector B the only Grey wire appears to be either pin 13 or 26 (not sure which one) and this goes to the Cam Pulse Generator (dont think you would be piggybacking any 12v supply on to this wire! )
Of course I have a US workshop manual that I ordered from repairmanual.com as we get charged $300au (~$210us) from the dealer for a workshop manual.
but my blade is a euro model like yours so Im not sure if the wiring is colour coded differently?
This mod sounds like a possiblity but I wouldnt be game to try it unless someone who had 1st hand experiance could tell me with conviction exactly how it was done and that it definately works, even then Id be concerned trying it on my pride and joy :crap: anyway if you have some solid details you can give us that would be great :thumb:
 

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swtos said:
This mod is working for about 5 months on my '03 954. With a little switch
under the seat, i can test the whole thing. The sound of the bike is more
aggresive but it needs a new map after 11500 rpms (and maybe some other mods....). The bike has 5.5% more speed in every gear but without remapping, the power drops quickly after 11700. Sorry for my bad english..
that is cool...did you do this by yourself? I dont know if anyone in Greece does it, nor does the official Honda Branch :huh:
 
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