I would say on a doo at high elevation holds true but not at low elevations.
The 800HO below 3000' worked well with the Crank Shops. Supposedly with the right port timing they worked good at elevation....supposedly.
just put jaws twin pipes on my skidoo xp 860
- Thread starter the king
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I would say on a doo at high elevation holds true but not at low elevations.
The 800HO below 3000' worked well with the Crank Shops. Supposedly with the right port timing they worked good at elevation....supposedly.
I'm not saying that Cat and Poo haven't left power on the table with their pipe designs. This is not about brand bashing.
My POINT is that twins flat out make MORE power than single pipes. No question! There is always sacrifices when using a single pipe instead of twins when it comes to power. I also agree that doo's stock singles do work very well for a single pipes, no question.
The real issue might be that no one can fit the right shape of twin pipe in REV or XP chassis that make the running of twins worth it... And many more would argue that even if the right shape of twin pipe could be placed in a the XP chassis, that the finicky nature of twins still might not be worth it.
I also believe Cat and Poo have used compromises in pipe design to curb higher sound levels where Doo has used compromises in RAVE valve positioning - ala Turbo Al's discovery of increased power when cutting the RAVE's.
Just my thoughts...
well since the King abandoned his post, I might as well jack it!
my instructions say to remove the cross support bracket off between the shock mount and the beam below the headlight.. is this really a good idea??? maybe for a drag sled, but for a mountian machine? i am skeptical! that thing is steel, and from my experience, anything that is steel on a sled is important and should not be removed.
anyone else with twin pipes or an idea about this please chime in, i wanna know if i am risking turning this '07 rev of mine into a pretzel after the first rollover.
my instructions say to remove the cross support bracket off between the shock mount and the beam below the headlight.. is this really a good idea??? maybe for a drag sled, but for a mountian machine? i am skeptical! that thing is steel, and from my experience, anything that is steel on a sled is important and should not be removed.
anyone else with twin pipes or an idea about this please chime in, i wanna know if i am risking turning this '07 rev of mine into a pretzel after the first rollover.
You needed to remove the brace with Crank Shops too.
If you want to run the pipes you really have no choice.....just don't crash.
If you want to run the pipes you really have no choice.....just don't crash.
there must be a way to mod that bracket to allow it to still be used in there, I had another look at it, ...thinking about putting a serious bend in it or welding a hoop in the middle of it to provide my one pipe to go through it and perhaps still have a support.
I am starting to think these pipes are really only meant for drag racing.
I reassembled it all now, and put my stocker back in.. but i really wanna use these puppies! if i ever get the bracket to work, I'll put up some photos for others.
I am starting to think these pipes are really only meant for drag racing.
I reassembled it all now, and put my stocker back in.. but i really wanna use these puppies! if i ever get the bracket to work, I'll put up some photos for others.
L
lightening800
Well-known member
tt
ditto my 800r with crankshop mondo pipes made 164hp and it haulled in the hills too.
ditto my 800r with crankshop mondo pipes made 164hp and it haulled in the hills too.
yeah porting is a very important process you dont have to do it but it make's the engine stress less plus it increase's HP I dident do it no sense it a DOO!!!!! nothing run's like Em.
Jonny
Jonny
yeah i have been testing for some time now and the jaws pipes are the way to go on the 860 bb. They are about 12 hp and you need to run 8300 rpm. I have a friend with just a bb and when we hit the hill you can see a huge difference.
Elvis has entered the building
S
SylvanLaker
Well-known member
yup did two different pipes on my 800 rev with no change, stock all the way, never again will I waste money on those aftermarket paper weights.. turbo or stock... my 2cents..
So if a stock pipe bigbore makes 170hp then we should expect atleast 180/185 from twins. Lets see some dyno numbers Jaws.
Get the brace off of the 440/600 chassis it is made differently and will clear twins.
T
trinitypowder
Well-known member
I'm with Stoney on this one. I doubt they are that good. Jaws started selling them 14-15 months ago, and where are they??? I think they went broke buying body panels that melted during testing
I seen the cranksshops in Vinnie's sled and man it was a stuff. I was wishing they made silver heat tape in a spray can. Must have spent a couple hours tapin her up.
Yeah like putting 10 lbs of $hit in a 5 lb bag!
If you guys actually believe that a factory pipe made for the low compression, mild ported, slow to open its Rave valves, over rich, and generally softly tuned stock 800r engine is the sh@t for an 860 bb fully prepped hot rod motor you are absolutely nutz!! A pipe needs to be designed for the motor. We have been finding a solid 400 rpm gain and about 4 mph track speed by simply testing variations of the stock exhaust on a slightly modded 800. Add another 60 cc and there IS power being left on the table.
I dont know if Jaws has found it but they have been successful in the past. Just because you dont have a set, dont knock on those who do
I dont know if Jaws has found it but they have been successful in the past. Just because you dont have a set, dont knock on those who do
Holy Cow Triple 7! Sounds like you need to go see June down at YoYo's and get a glass of chill juice. I have not heard anyone say Jaws sucks. Just hard to fit in the Chassis. I agree with you on the pipes built for the motor but if you need to hack your sled to pieces and melt your sled to use them then they better make some huge numbers. Jaws doesn't post power numbers exept to say 20+ over stock system. My BB is already 20 over stock so are they saying 20 more.
Hopefully Dynotechresearch can get a set on a 860 and will see how good they are. Far as I'm concerned Jaws pipes might as well be filled with some good gonge if they're not going to post some dyno sheets to back up they're claims. But if they do make say 190hp I would be very surprised and would also be the first to buy a set.
Hopefully Dynotechresearch can get a set on a 860 and will see how good they are. Far as I'm concerned Jaws pipes might as well be filled with some good gonge if they're not going to post some dyno sheets to back up they're claims. But if they do make say 190hp I would be very surprised and would also be the first to buy a set.
Ya I was a tad wound up. My bad on that one. I agree that hacking your sled up and having melting issues is a bad thing but all I was trying to say is that a properly tuned exhaust (single or twins) for a mod big bore WILL build more power all the way through the powerband than a factory pipe that is tuned for the factory motor.
This is why in the motocross world each big name engine builder has a their own pipe or they spec a pipe for their mod motor.
As for dyno numbers, they are helpful but my prepped, non big bore, never been dynoed XP always out performs the guys that want to talk about dyno numbers and how much power their sled makes on a dyno. Its a tool, not a be all end all. We dont ride on dynos, we ride in the hills. A properly tuned exhaust makes a sled better on the mountain, where it counts.
This is why in the motocross world each big name engine builder has a their own pipe or they spec a pipe for their mod motor.
As for dyno numbers, they are helpful but my prepped, non big bore, never been dynoed XP always out performs the guys that want to talk about dyno numbers and how much power their sled makes on a dyno. Its a tool, not a be all end all. We dont ride on dynos, we ride in the hills. A properly tuned exhaust makes a sled better on the mountain, where it counts.
Your on the money with motor specific pipes. Port timing and pipe design are huge factors. It takes time to develop just the right combo. Which is why the dyno is so important. It allows you to tune the setup in the shop. I know Jaws has one so why not post some sheets. Slp does and peeps buy their stuff. It's great advertising.
