The first TURBO fjr
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Ari Rankum
NAFO Karting Champion, 2012
That's got to be Etch-A-Sketch 9.0 Beta, at least, because arcs weren't possible until version 9.0 Alpha.Hot Damn, Matt. What CAD program do you use?
wheatonFJR
...
:headbonk: :trinibob: :lol2: :lol2: :lol2:I just finished some sophisticated modeling of how to place a turbo, speed figure calculations, a testing plan, and a detailed cost estimate.
......
Ready?
OK very understandable that the bike is not ACTUALLY going to do 220mph, the issue here is can the gears be made large enough to accomadate that large a ratio change, due to the shape and size of either the the differential case, or the transmission case.
Im not stupid, the goal here was to turbo the fjr, have it geared for 220 so ill never have to mess with the gears EVER regardless of what i decide to do or not do with it. I dont thnk tires can really go much faster than 220 anyways. Changing the gearing to this might put me around 3000 rpm when im on the highway and increase the life of the engine (how about that omg)
People can buy otc kits to get 450-500 hp out of the 1.3 litre busa motor, and i dont think that 280/300 is such a far fetched idea for a fjr motor. The guys that will build the turbo system will do their job in acheiving the most power they can and it will be what it is, it can be done for about 4-5 grand. Im not going to fork out anouth 100 grand to improve the aerodynamics and and increase tht top speed by another 2mph. I dont see why its such a laughable idea. People have done up the k1200 do hit over 200, and its really not all that expensive. And the longevity of the bike motor will only be compromised if i take it to the track and light it up every single weekend, untill then when a bike is burning x amount of fuel and x amount of air to do x speed, the fact that the air passed through a turbo prior to entering the motor will in no way effect the life of the engine.
So from what i take it nobody has ever attempted to chang the differential ratio, or seen the differential gears to see if the teeth can be recessed further closer to the wheel. And nobody knows how much labor is involved in opening the transmission case.
Im not stupid, the goal here was to turbo the fjr, have it geared for 220 so ill never have to mess with the gears EVER regardless of what i decide to do or not do with it. I dont thnk tires can really go much faster than 220 anyways. Changing the gearing to this might put me around 3000 rpm when im on the highway and increase the life of the engine (how about that omg)
People can buy otc kits to get 450-500 hp out of the 1.3 litre busa motor, and i dont think that 280/300 is such a far fetched idea for a fjr motor. The guys that will build the turbo system will do their job in acheiving the most power they can and it will be what it is, it can be done for about 4-5 grand. Im not going to fork out anouth 100 grand to improve the aerodynamics and and increase tht top speed by another 2mph. I dont see why its such a laughable idea. People have done up the k1200 do hit over 200, and its really not all that expensive. And the longevity of the bike motor will only be compromised if i take it to the track and light it up every single weekend, untill then when a bike is burning x amount of fuel and x amount of air to do x speed, the fact that the air passed through a turbo prior to entering the motor will in no way effect the life of the engine.
So from what i take it nobody has ever attempted to chang the differential ratio, or seen the differential gears to see if the teeth can be recessed further closer to the wheel. And nobody knows how much labor is involved in opening the transmission case.
Try searching. I think I remember at least a rumor that the Vmax pumpkin of some years may be a higher gear ratio and bolt in one of the two Gens of FJR. Nobody has changed gears or final drive on this forum that I am aware of.
You might be trying to squeeze blood from a turnip.
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The FJR spins at about 4100 rpm in 5th gear at 75 mph. Lugging it along at lower rpm will not necessarily increase the engine life.
If you aren't ever going to reach 220mph, or even beyond the present ~150 mph top end, putting higher gearing in is folly. For one thing, you'll lose some of the acceleration you are paying so dearly for by turbo-charging the motor. You either haven't clearly thought through what your design goals are, or you aren't expressing them clearly.
Before you start busting on other people for not having messed with increasing their overall gear ratios, maybe you should ask yourself why that is. My hypothesis is because the FJR is not a sport bike. If you want a 220 mph capable bike you should probably think about starting with one of those.
twowheelnut
R.I.P. Our Motorcycling Friend
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Roadrider
Well-known member
:lol2: Wheaton, That's some funny stuff right there.
:lol2:
:lol2:
wheatonFJR
...
I agree that it's hilarious...but IGGY is the mastermind of that little sketch...not me.
(I just had to throw in that little trinibob smiley...been dying to use it. Hey trini...you still out there? or are you too busy changing semi-truck tires with yer bare hands?)
Warchild
Benevolent Dictator
Matt was discussing this project at lunch today. I might have mis-heard him, but I believe he was using Ex-o-Sketch ver 2.70bHot Damn, Matt. What CAD program do you use?
Mighty sophisticated stuff, that.
:lol:
I wish I had that spiffy of software.Matt was discussing this project at lunch today. I might have mis-heard him, but I believe he was using Ex-o-Sketch ver 2.70bHot Damn, Matt. What CAD program do you use?
Mighty sophisticated stuff, that.
:lol:
I was using MSPaint.exe ver 5.1.2600. I find it's abilities far exceed my own when it comes to layering and finite element analsysis. I also can feed data directly into my Play-Doh Extrudomatic 2000.
hardluk1
Active member
Hows that fred? f it.
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Roadrider
Well-known member
Dude. Simmah dow now.
I'm sure you had something good to say in there, and it may have been worthwhile reading, but punctuation, grammar and spelling are your friends.
I say do it, but forget about the gearing changes for now. Stock
gearing will put you at about 170 before the rev limiter kicks in,
and i doubt you would want to go any faster.
I do know someone who could make you a set of gears '4th & 5th',
or a new final drive, for a reasonable price.
I always wanted to turbocharge a Burgman, dress up like Peewee
Herman, and go Harley hunting.
gearing will put you at about 170 before the rev limiter kicks in,
and i doubt you would want to go any faster.
I do know someone who could make you a set of gears '4th & 5th',
or a new final drive, for a reasonable price.
I always wanted to turbocharge a Burgman, dress up like Peewee
Herman, and go Harley hunting.
I know you are getting a little beat up about all of this. Know it is all in good fun. I recently considered the turbo option and decided against it for several of the reasons mentioned.
Now, although it won't get you to 220mph, how about spending some of that money to get a cam and regeared shaft built for the bike. I'm sure you would get several FJR owners to buy them as well.
Now, although it won't get you to 220mph, how about spending some of that money to get a cam and regeared shaft built for the bike. I'm sure you would get several FJR owners to buy them as well.
2WheelTiger
Chief Executive Carnivore
Re: Gearing changes.
Assuming 170 at the current rev limit and 220 as your design goal: Your re-gear will require a change of nearly 30% in the final ratio. Effectively, you'll be starting the bike in 2nd or 3rd gear. (No, I didn't look up the individual ratios and do the math.)
Assuming 170 at the current rev limit and 220 as your design goal: Your re-gear will require a change of nearly 30% in the final ratio. Effectively, you'll be starting the bike in 2nd or 3rd gear. (No, I didn't look up the individual ratios and do the math.)
Are you getting 170? I understand you said "assuming". I'm only getting 150 at the redline. Just curious. I'm always looking for a way to go faster.
