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ROTAX HP ??

HDXBONES said:
The 106hp is engine hp. Actual rear wheel hp is in the 90 range....

picture.php
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Yep thank you. Thats what I wos wanting to know.I'm assuming that is STOCK? So when we add our air filter and juice boxes. That comes up???
 
HDXBONES said:
That dyno was from a guy claiming to have modified a power commander a while back. I would think those are his best numbers, stock is probably a little lower. Also, it doesn't say what gear the run was, or what the correction factor is. I think it's more useful to see the shape of the curves, and to see where max torque is, as opposed to peak hp. The torque curve is much more relevant information, and it's what is actually measured. Hp is only a mathematical calculation, based on measured tq and rpm.....
Click to expand...
:agree:Very much:agree:
 
Okay then how does Rotax put the CLAIMED 139hp on the rotax 990 eng. in the motorcycle and then WOW put it in the Spyder and now its just a detuned 3 wheeler?? nojoke I am not joking here. Seems to me if the Rotax 990 puts out 139hp in one bike then what the hey prevents the SAME eng. from doing the same h.p. in the other bike?? Yes I know its DE TUNED but' if it is DE TUNED then there MUST be a way to RE TUNE it. If not then that would make ROTAX lying about any given hp.:lecturef_smilie:
 
Eddie said:
Okay then how does Rotax put the CLAIMED 139hp on the rotax 990 eng. in the motorcycle and then WOW put it in the Spyder and now its just a detuned 3 wheeler?? nojoke I am not joking here. Seems to me if the Rotax 990 puts out 139hp in one bike then what the hey prevents the SAME eng. from doing the same h.p. in the other bike?? Yes I know its DE TUNED but' if it is DE TUNED then there MUST be a way to RE TUNE it. If not then that would make ROTAX lying about any given hp.:lecturef_smilie:
Click to expand...

Eddie , they aren't lying , The 990 is an engine "family" and it is a base motor that Rotax produces and it is then built to the specifications that each manufacturer asks for. Thus it makes 139 hp when used in the Aprilla (and also sports a 6th gear where our reverse gear lies) . BRP specified (asked Rotax for) a different torque curve and hp for the Spyder. The internal components on the 990 motor are 75% the same when comparing the 990 Aprilla motor versus the Spyder motor. However , the cams are different , the pistons are different , the timing is different, etc etc. So as you see its not really just detuned , its built differently.....Want to RETUNE it? Do some machining and drop the top end off the Aprila on the spyder motor and about $4000 later you may have what your looking for. :thumbup:
 
widowmaker2011 said:
Eddie , they aren't lying , The 990 is an engine "family" and it is a base motor that Rotax produces and it is then built to the specifications that each manufacturer asks for. Thus it makes 139 hp when used in the Aprilla (and also sports a 6th gear where our reverse gear lies) . BRP specified (asked Rotax for) a different torque curve and hp for the Spyder. The internal components on the 990 motor are 75% the same when comparing the 990 Aprilla motor versus the Spyder motor. However , the cams are different , the pistons are different , the timing is different, etc etc. So as you see its not really just detuned , its built differently.....Want to RETUNE it? Do some machining and drop the top end off the Aprila on the spyder motor and about $4000 later you may have what your looking for. :thumbup:
Click to expand...


Exactly. Gotta swap cams and pistons to make it like the 'other' 990.
 
It is my understanding that the reduced HP is in the valve-train, less cam and possibly smaller valves,also lower compression ratio. One would think that camshafts could be replaced in our engines to the 139HP engine cams,not so. They use a brand specific cam gear and cams cannot be interchanged,there are some A/M cam companies looking into this IE; Webb, and Crane. as of now I personally have not sourced any better cams to put in our engines.

Jim:thumbup:
 
Eddie said:
Okay then how does Rotax put the CLAIMED 139hp on the rotax 990 eng. in the motorcycle and then WOW put it in the Spyder and now its just a detuned 3 wheeler?? nojoke I am not joking here. Seems to me if the Rotax 990 puts out 139hp in one bike then what the hey prevents the SAME eng. from doing the same h.p. in the other bike?? Yes I know its DE TUNED but' if it is DE TUNED then there MUST be a way to RE TUNE it. If not then that would make ROTAX lying about any given hp.:lecturef_smilie:
Click to expand...
If you want to spend the time and money to replace the changed engine parts, including cam, pistons, and heads (with a different combustion chamber shape), change the throttle body (bodies), and you can figure out a way to crack the BRP ECM so you can map the ignition and fuel curve, you should be able to do just that. Nobody is lying. The original engine design was 139 hp, the Spyder RS is 106 hp, and the same design in the Spyder RT is 100 hp (95 on the MCO). The Spyders need more torque down low than the Aprilia crotch rocket, and that requires changes to the engine and engine management systems. A 283 out of a 1957 Chevy station wagon had the same engine design and nearly the same size as my Jr. Fuel dragster, but they were vastly different in both tuning and hard parts.....with vast differences in horsepower.
 
Well in the stock car eng. the 350 becomes a 355 , 360 , 383 and so on. Depending on the build. Now you are to tell me the same Rotax990 stays 990 no matter what the hp claims. Sorry don't buy it. Read below one of their claims
Particularly for the Spyder, we chose the 990 engine because it is a proven high performance package. It is forged through racing for utmost durability and performance. It is light weight, compact and reliable – a riders dream! The V structure gives an incredible punch at low torque, slim packaging in the vehicle and a very good power-to-weight ratio. The V990 has a distinctive sound – no other V2 has in the market. You can recognize it with your eyes closed from a distance. Subtle, yet powerful and imperative. She tells you she packs enough ponies to give you lots of fun!
Now the technical stuff. The Spyder engine is a rather unique 60° angle structure and features a fully balanced high output V2 with 997.6ccm displacement, 4 valves per cylinder and fuel injection (EFI). – It links directly to the Spyder 5-speed manual sequential or 5-speed sequential semi-automatic transmission with a full mechanical reverse gear – just like on your car. The concept was adapted to the Spyder because of already mentioned attributes – slim packaging, power to weight, performance and proven durability.
The technology surrounding Spyder’s engine starts at the very base – the materials. The 990 engine features a lot of materials and heat treatment technologies which I am actually not allowed to speak about! Since we are a world leader in so many powersport segments a lot is at stake for us. But I can say that if you align all we did in the development of this specific power pack and the many hard tests we did, you could fill a book worth reading! This power pack was originally concepted for the Super Bike market and race circuits, so therefore materials were chosen which could withstand the high loads for extended periods of time.
The design of the engine is what makes Spyder’s 990 engine different from other Rotax engines found in motorcycles like BWM and Aprilla. The 990 is a V- structure while the BMW is an in-line, parallel structure. The V990 features rotating counter balancer shafts – if you know what these are! – while the BMW 804 engine features a different balancing concept via balancing rod. The BUELL engine is a similar engine type. V-structure still, but with a different displacement. The 1125 packs a lot of V-990 genes in its design.
In the end, the team at Rotax has pulled together a state of the art and unique engine designed precisely for your Spyder. Enjoy riding!
-Mischa Zimmermann
WERE THE H E L L IS IT?? My VTX1800R would have SMOKED this 200mph thing I now ride.What really bothers me here is every one seems to say suck it up and take the lie. Fact is I love to ride my spider but' am very , VERY disappointed in its performance. Hell my Bro's full dresser HD out ran me. NOT BECAUSE I SHUT DOWN AT 110MPH ACTUALLY WENT TO 123MPH. But he smoked me there,thats just WRONG on a bike that has a FALSE speedo reading of 200mph.
Got the reading from this link http://spyder.brp.com/en-US/Share/C...?EntryID=4786320a-6583-4c9b-8ad1-28681810c857
 
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aprilia's engine

how about a low mile engine out a crashed aprilia mille? will it fit? will consider it when need arises...opinions?
 
jedd said:
It is my understanding that the reduced HP is in the valve-train, less cam and possibly smaller valves,also lower compression ratio. One would think that camshafts could be replaced in our engines to the 139HP engine cams,not so. They use a brand specific cam gear and cams cannot be interchanged,there are some A/M cam companies looking into this IE; Webb, and Crane. as of now I personally have not sourced any better cams to put in our engines.

Jim:thumbup:
Click to expand...

Ken at Evoluzione sold (maybe still does) cams and pistons that will take our HP up to 140+.:thumbup:

====================

I don't see anything false being advertised by BRP about the power of the Spyder. It's always been around 106 hp. For the footprint, weight and horrible aerodynamics of the Spyder--- it moves pretty quick. 0-60 in 4 seconds isn't bad.

A more fair comparison would be against other trikes--- and the Spyder would do quite well against the other options out there.
 
OH WELL Guess I still like it. Especially the sound. Don't think you gonna get any closer to a hot rod Harley Davidson sound than these Spyders do with an after market exhaust. That I LOVE :2thumbs:
 
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