Horsepower

[Tonga]

I for one wanted a larger displacement for torque not HP. Not looking at doing 100 mph. The Spyder is not built for that!! Multiple cylinders also means smoother.

 

[Bob Denman]

Amen! :bowdown: :thumbup:

 

[Rayelljay]

I'm no slouch when it comes to speed, in fact I bet I'm the upper range as far as Spyder Op's go....But really..Any Spyder can get very ILLEGAL in about 10 seconds....12 if towing a trailer....These things are not being marketed as Drag Racers......If you really want to go fast just buy a " Busa "....Don't ruin the Spyder for the Thousands of Spyder - lovers who are mostly happy with this aspect of the Spyder.....BECAUSE BRP is not going to produce 6 or 7 Different varieties of engine.....If they make a 150 HP engine we are all gonna get it, like it or not.......and if they boost the HP by 10....BRP will still hear the complaints by the same crowd..awh gee Only ten HP........Think about it.....OK off the soap-box.........VOTE BELOW....DO YOU AGREE ....IF NOT LEAVE BLANK......Mike...:thumbup:

I agree.
Was watching the Isle of Man TT reces this evening and they broadcast the Sidecar race and guess what.......the power plant for the winning rig was a stock Kawasaki 600 pushing about 140 HP.
Spyder, as it is, is plenty,

 

[billybovine]

A few different parts

I don't understand the horsepower thing. If the RS and RT (2012 and prior) engines are the same, how can the horsepower be different?

All :spyder2:'s have the same crank, cylinders and heads so the bore, stroke and displacement are the same. The part numbers on the cam shafts are different between RS' and RT's so I would assume that they changed the valve timing and duration. They also boasted the compression ratio in the RT's. The connecting rod is a different part number (maybe longer?). The piston is a different part number (different shape top surface?). This would reduce the squish volume explaining the different compression.

 

[Sarge707]

The 998cc Rotax Engine has produced 121,127 and 136HP in Modified forms in the Aprila,s?
Its just a matter of When they want to increase the Spyder Horsepower?

 

[Ga Blue Knight]

Power, Reliability, Cost........Pick Two!

 

[NancysToy]

All :spyder2:'s have the same crank, cylinders and heads so the bore, stroke and displacement are the same. The part numbers on the cam shafts are different between RS' and RT's so I would assume that they changed the valve timing and duration. They also boasted the compression ratio in the RT's. The connecting rod is a different part number (maybe longer?). The piston is a different part number (different shape top surface?). This would reduce the squish volume explaining the different compression.

Thanks for looking that up. I was too lazy and it was too late. pps: A longer rod can't increase the compression, BTW, it just reduces cylinder wall loading. I suspect most of the (effective) compression ratio difference is due to valve timing, not a change in piston dome size. Just guessing, I have never cc'd a Spyder.

We should all hold back a bit on assuming the RS horsepower was lowered. BRP's press releases and spec sheets have been frought with errors. They may have inadvertantly copied and pasted, and nothing might have changed at all. The new parts fiche should give us a clue.

 

[Bob Denman]

The 998cc Rotax Engine has produced 121,127 and 136HP in Modified forms in the Aprila,s?
Its just a matter of When they want to increase the Spyder Horsepower?

Okay; they've got some Aces hidden up under their sleeves... :thumbup:
Will the existing transmissions and belt drive handle the extra power? :dontknow:

One thing that I learned from serious tinkering with snowmobile engines; you change just ONE thing, and then you've got to change three more...:gaah:

 

[draboo]

Power, Reliability, Cost........Pick Two!

this

 

[NEXUS]

Power, Reliability, Cost........Pick Two!

Power, Reliability,

I have been in the background patiently waitingopcorn: for them to come out with a larger engine as an option for the Spyder.

I upgraded from the RS to the RT early this year I had heard through the grapevine earlier that there may be a new model
coming-out a sportier version and I honestly thought this was the year that they were going to put a larger engine in as an option.

BRP filled in a gap with the ST and STS and ST limited that was needed. Lamont was correct they needed one between the RS and RT.
I'm not exactly on my way to Florida yet (no pun to the people that live in Florida )to retire but when I got on the RT I felt like I was
climbing into grandpa's Cadillac theirs too big a transition between RS and the RT. They have done an excellent job creating this in
between ST which some of us had already done with the RS.

Now not everybody wants horsepower but I do and I'm willing to pay for it when the time comes.
There are new players coming out I believe in the near future not conversion kits but factory Can Am designed styled trikes. This market
has expanded dramatically recently HD now builds their own trike in their factory as we all know and if I'm not mistaken it ranks sixth
in sales of their entire motorcycles sales. I am a devoted Spyder patron but if Honda took their 2013 Gold Wing GL1800 and turned it
into a factory made Can Am styled trike I may have to switch.

What I'd like to see-1500cc-6 gear (forward)-shaft drive-larger gas tank-

Maybe what is needed is competition a new player on the field





Nexus

 

[boborgera]

Truthfully as i get older horsepower isn't my God anymore, ''Reliability'' is.
Besides i don't look at speed limits as a challenge any more.

 

[Ga Blue Knight]

I am a devoted fan of the Spyder but it does get very seductive to think of a Goldwing front wheeled trike with shaft drive, six cylinder 1,800 cc motor and a large gas tank. Although i will have to learn how to shift again!

 

[billybovine]

Thanks for looking that up. I was too lazy and it was too late. pps: A longer rod can't increase the compression, BTW, it just reduces cylinder wall loading. I suspect most of the (effective) compression ratio difference is due to valve timing, not a change in piston dome size. Just guessing, I have never cc'd a Spyder.

We should all hold back a bit on assuming the RS horsepower was lowered. BRP's press releases and spec sheets have been frought with errors. They may have inadvertantly copied and pasted, and nothing might have changed at all. The new parts fiche should give us a clue.

Good point about the published specs being incorrect initialy. We will have to wait and see.

Now getting to compression ratio. It is my understanding that compression ratio cannot be changed by the cam. Wikipedia quote "The compression ratio of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity" Compression pressures can certianly changed by the cam but are not reflected in the compression ratio calculation. There are only two parts that are different from a RT engine to a RS engine. They are the connecting rod and piston. So the compression changed was done somehow with those two parts. If I am wrong on this please explain where. thanks

 

[NancysToy]

Good point about the published specs being incorrect initialy. We will have to wait and see.

Now getting to compression ratio. It is my understanding that compression ratio cannot be changed by the cam. Wikipedia quote "The compression ratio of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity" Compression pressures can certianly changed by the cam but are not reflected in the compression ratio calculation. There are only two parts that are different from a RT engine to a RS engine. They are the connecting rod and piston. So the compression changed was done somehow with those two parts. If I am wrong on this please explain where. thanks

It is my guess, which counts for nothing, That the compression ratios BRP is reporting are not necessarily those seen in reality. There are two compression ratios. The actual ratio is calculated taking the combustion chamber volume and subtracting the piston dome volume. The effective ratio takes valve opening into effect, since compression can't begin until both valves are closed. Technically, this is a measure of compression pressures, but an effective compression ratio can be calculated or volumetrically measured. The cam timing and profile affect this figure.

 

[billybovine]

It is my guess, which counts for nothing, That the compression ratios BRP is reporting are not necessarily those seen in reality. There are two compression ratios. The actual ratio is calculated taking the combustion chamber volume and subtracting the piston dome volume. The effective ratio takes valve opening into effect, since compression can't begin until both valves are closed. Technically, this is a measure of compression pressures, but an effective compression ratio can be calculated or volumetrically measured. The cam timing and profile affect this figure.

Thanks a learning moment.