ski doo XP exhaust????

[ONETON]

Hi there, just wondering if anyone has after market exhaust on there xp? I have been doing research that they all gain horsepower but you lose torque which reduces performance. Does anyone noticed gain or loss on there sled??? which can works and sounds the best?? If any one can help out with this that would be great. And what about those clutch tower braces, are they a waste of money??
Thanks for your time.

 

[EMANAARON]

The sound makes it gain 10hp:d

You ride better when you can hear it!!!

 

[britt]

Go with the MBRP can (Look up Mr R's web sight and there should be some tech info on the MBRP cans for the Rotax motors) Besides you don't do it for horsepower gain (because it is hardly noticable) you do it for weight loss my And if you go for a can make sure it is one of the quieter ones.

Britt

 

[ONETON]

Thanks, Why do you say go for the quiet one, do you have mbrp on your sled?
thanks again.

 

[dlg27]

I have a mbrp on my xp and like it. Its not super loud but sounds good

 

[tfitz]

On my 2008 rev XP I had a Aaen Pipe and Jaws silencer, the single pipe was nice cause it added HP and Tourque, but was not much loader then stock, although it had a very noticable sound here is a link to the Aaen website with HP curves, also I think with pipe and silencer you save like 15#
Aaen Performance - Snowmobile : Ski-Doo Rev XP

 

[jbb]

save your money and add a head and a can. we ran piped ones against ones with heads. and we seen better gains with the head. call terra alps racing he has good heads for the xp's.

 

[maxwell]

dynoport and slp. used both setups.

ypipe can and pipe combo nice gains! and weight loss.

 

[pistonbroke800]

Hi there, just wondering if anyone has after market exhaust on there xp? I have been doing research that they all gain horsepower but you lose torque which reduces performance. Does anyone noticed gain or loss on there sled??? which can works and sounds the best?? If any one can help out with this that would be great. And what about those clutch tower braces, are they a waste of money??
Thanks for your time.

Try Dynoport or Straightline Y pipe and pipe
SpecialtySleds has a very lightweight can that sounds good not too loud
The clutch tower brace is supposed to strengthen your PTO side, be it engine torque twisting the motor and moving clutch alignment out. Or it could help you from front end damage in collisions. Weather or not they work i dont really know. If you can get a cheap one it might be worth it.

 

[britt]

Thanks, Why do you say go for the quiet one, do you have mbrp on your sled?
thanks again.

If you will be riding near populated areas you may want to think about keeping the exhaust noise down a touch, plus you would make Sledder Glen a happy camper:d And yes I do have a MBRP can on my sled and have not had a moments trouble with it. I have it on a 600 HO rotax and the one I put on is the quiter model and like I said before I put it on for the weight reduction.

Britt

 

[mur190]

buddy of mine runs a dyno port.. works really good he also did the boyseen reeds which he said really improved throttle response.

 

[POWDERSLUT]

i use the dyno port y and single with a THING can and have had zero issues,now i just gotta get this belt drive working flawless,2 different times out and 2 destroyed belts and very short days.....help me C3....

 

[Modman]

I have been doing research that they all gain horsepower but you lose torque which reduces performance.

That's true to some extent but its all based on the math. "performance" is a hard term to define - motor performance? Clutch performance?

HP is a multiplication of torque, and RPM, divided by a rotational coefficient. HP is simply a calculated value based on torque and RPM, nothing more.

70 ft/lbs torque @ 7500 RPM = 100 HP
70 ft/lbs torque @ 9500 RPM = 126 HP
So for this ^^ peak torque stayed the same but it was moved way up in the RPM band, making more power. This would not be ideal from a sledding standpoint, unless you are running an oval track sled where you keep it pinned to the bar for 20 mins. Motor performance is great but if it doesn't make it to the track because your clutched for 8500 RPM max then this motor example above would be more of a headache than a HP increase.

You typically will not gain and lose much of either with a can, they are more about the weight drop, but keeping the torque lower in the RPM band is beneficial to your clutching, from an efficiency standpoint anyway. If you are adding a y-pipe and/or pipe there are a few more factors to consider, especially once the torque and HP start increasing.

If the torque gets shifted around higher, even if the value is a couple ft/lbs less and the RPM is a couple hundred higher, the value is still basically the same, even though the calculated HP is slightly more.
78 ft/lbs torque @ 7800 RPM = 116 HP
80 ft/lbs torque @ 7500 RPM = 114 HP
80 ft/lbs torque @ 7200 RPM = 109 HP

In this example ^^^, I would rather have the peak torque at 7200 RPM from a clutch efficiency standpoint and less HP, even though the HP is higher with less torque at a higher RPM.

This all assumes that the power curve is linear as well. Measuring peak power is fine, but a sled that maintains a peak torque value for a longer RPM range, is far easier to clutch and ride than a sled that makes more power but for a shorter period, so this is something that you also want to look for in whoever's pipe and can combo you choose.

i.e. sled A makes:
75 ft/lbs at 7000 RPM (100 HP)
80 ft/lbs at 7500 RPM (114 HP)
75 ft/lbs at 8000 RPM (114 HP)

sled b makes:

70 ft/lbs at 7000 RPM (92 HP)
85 ft/lbs at 7500 RPM (121 HP)
70 ft/lbs at 8000 RPM (106 HP)

Sled A will be easier to clutch and ride because it maintains a more linear power curve than sled B that makes more power but is far peakier.

This is some of the basics of it all, but just some things to think about when looking at y-pipes, pipes and can combo's and who's makes the most claimed "HP". Always ask for dyno sheets and graphs, they can give you some idea of what is going on with the product and cut through some of the hype.

As for the AAEN stuff, I run their pipes on one sled and can say their stuff works, at least on my sled. Hope that helps.

 

[maxwell]

i use the dyno port y and single with a THING can and have had zero issues,now i just gotta get this belt drive working flawless,2 different times out and 2 destroyed belts and very short days.....help me C3....

yikes?

i was JUST about to order that.

they say they have been running it on 250hp+ machines no issues?