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polaris triple guru's....
started by bm_zimmer
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October 15th 2009 at 8:53 PM
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bm_zimmer
Starting Member
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9 Posts
Group: Members
Member Since: October 15th 2009
Location: syracuse, ny, USA
Current Sled: 96' xcr 60 sp
2008-2009 Miles: 800
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hello! im new to this forum and i have a couple questions before the snow season kicks off. i have searched the forum but i havent found what im looking for yet. i know this is a gone over topic before and again but i have a 96' xcr 600 sp tripl-triple. its all stock and im wondering if i can ditch the collector box and build out the exauhst thru the hull? what impact would this have on fuel ratios and how big should i go with the jetting? im trying to shy away from buying a set of slp pipes or a dp can. im still new to sled motors but i do have a decent knowledge of car motors.
thanks for all that help,
brian
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Site Supporter
Group: Site Supporters
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October 15th 2009 at 9:01 PM
[ Modified October 15th 2009 at 9:02 PM
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RMK-KING
The Fabricator Moderator
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9124 Posts 
Group: Moderators
Member Since: October 3rd 2002
Location: Center and Roseglen, ND, USA
Current Sled: 09 RMK 700 & 06 IQr 600
2008-2009 Miles: 550
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What would the point of doing this be? Modifying the exhaust silencer will not gain you any HP if that is what you are asking.
Current Line Up
-09 RMK Assault
-06 IQ R 600HO
-01 ProX 600
-95 XCR 600
Days get shorter,snow gets deeper,life gets better.
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October 15th 2009 at 9:25 PM
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bm_zimmer
Starting Member
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9 Posts
Group: Members
Member Since: October 15th 2009
Location: syracuse, ny, USA
Current Sled: 96' xcr 60 sp
2008-2009 Miles: 800
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Quote originally posted by RMK-KING
What would the point of doing this be? Modifying the exhaust silencer will not gain you any HP if that is what you are asking.
i wasnt sure if i would gain anything out of it. i was thinking it would be opening up the exhaust, more free flowing. i was more asking, if i ditched the silencer and extended each exhaust pipe down individually, would there be a gain. i dont have my heart set on buying a set of triple pipes if i can get a reasonable gain from the stock triple pipes.
thanks,
brian
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October 15th 2009 at 9:37 PM
[ Modified October 15th 2009 at 9:38 PM
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stormrider62033
wally
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4729 Posts 
Group: Members
Member Since: December 25th 2004
Location: Gillespie, IL, USA
Current Sled: 99xcr 800
2008-2009 Miles: 500
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if you do that you might lose horse power,, you may get it to run ok but look out ,,would be deafening
mid Il alway's waiting for snow,moving north(way north)2001 thundercat 99xcr 800 97SPX ULTRA 96 zrt 600&800,92 doo plusX 92 v max 4 750
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October 15th 2009 at 10:22 PM
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RMK-KING
The Fabricator Moderator
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9124 Posts
Group: Moderators
Member Since: October 3rd 2002
Location: Center and Roseglen, ND, USA
Current Sled: 09 RMK 700 & 06 IQr 600
2008-2009 Miles: 550
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Correct,I would leave it how it is. The factory triple piped sleds are tuned pretty well from the factory so there is not much to be gained by modifing your exhaust. If you had a single pipe it would be another story.
Current Line Up
-09 RMK Assault
-06 IQ R 600HO
-01 ProX 600
-95 XCR 600
Days get shorter,snow gets deeper,life gets better.
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October 16th 2009 at 1:18 AM
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ACEXLT
THREE FOR ALL
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5668 Posts
Group: Members
Member Since: September 17th 2002
Location: Greenfield, WI, USA
Current Sled: '01 XCR 800
2008-2009 Miles: 1326
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All the information you need to know about detting your sled up is on this page towards the bottom...
http://www.geocities.com/schmidt92/polar...s_faq.html
'01 XCR 800
'00 Indy Triumph
TRIPLES RULE!!
TWINS HAVE NO BALLS!!
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October 16th 2009 at 4:49 AM
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Ugly_old_Poo_kid
techno-bumpkin
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1079 Posts 
Group: Members
Member Since: March 18th 2007
Location: Walworth, NY, USA
Current Sled: 05 Edge & Frankenstorm II
2008-2009 Miles: 165
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Forget 4 stroke motor knowledge with 2 strokes, it's like comparing apples to speakers.
2 strokes require exhaust tuning, not free flow. Take the advice of the guys above.
95 - Storm 800 - Modded - AKA: FrankenStorm - Totalled near 100mph at Tug Hill!
96 - XLT/SP with Storm 800 trip/trip and now EFI - FrankenStorm II lives...
95 - RXL -- Sale Pending --
05 - Edge 800 long track - Stayin' stock for now..
---------------------------------------------
It made me more compassionate, more empathetic, more nurturing...
I FEEL LIKE I'M TRAPPED IN MY OWN WORST NIGHTMARE!!!
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October 16th 2009 at 6:31 AM
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on that sled i would run a gearing close to 2:1 chain case ratio, leave the exhaust can alone, on that sled its hard to beat stock.
nothing goes like 3 holes!!
Aaen Performance!!!!
High performance engineering
millennium technologies
brtech hoods
price performance
Got Speed Racing
320-629-4889
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October 16th 2009 at 6:33 AM
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MaxTrax
Junior Member
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332 Posts 
Group: Members
Member Since: March 9th 2007
Location: Lowell, Michigan, USA
Current Sled: 1996 Polaris XCR 600
2008-2009 Miles: 325
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Opening a two stroke exhaust can cause a loss in performance. The triple pipes cause a back pressure throughout a certain rpm range which increases the amount of air/fuel mixture in the cylinder. The "shockwave" of back pressure almost acts as a closed exhaust valve; therefore you get more hp. Just opening the exhaust can reduce this "shockwave", letting fuel/air escape while the piston comes up; causing a loss in power. That is the best way I know how to explain it and I hope it makes sense.
1996 Polaris XCR - Triple SLP Pipes, Clutch Kit
*Try making fun of a purple and pink sled... see how far it gets you!*
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October 16th 2009 at 12:20 PM
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Polaris_Parts_MN
Junior Member
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200 Posts
Group: Members
Member Since: October 8th 2008
Location: NW minneapolis suburbs, Minnesota, USA
Current Sled: 1999 XC 500
2008-2009 Miles: 450
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^^good answer maxtrax. you dont want free flowing exhaust. the sound waves that go thru the pipe bounce back to the motor to provide back pressure (2 stroke motors need backpressure). no back pressure = less compression in cylinders = poorly running motor, or not running at all, or results in a blown cylinder.
1999 Polaris XC 500
-holeshot skid plate
-fox reservoir front track shock
-fox front shocks
-xenon low-beam bulb (very helpful at night)
Just add gas and snow!
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October 16th 2009 at 12:55 PM
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583custom97
Starting Member
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6 Posts
Group: Members
Member Since: October 15th 2009
Location: westfield, mass, USA
Current Sled: 1984 custom indy 600se
2008-2009 Miles: gothitched
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Maxtrax is right on.I owna 1984(old) polaris indy 600 triple with a set of psi triple pipes on it with a bunch of motor work done, I took apart the cans at the end of each pipe and took the baffles out and then dynoed it and lost 10-12hp.After that trial we cut of the old scorpion cans and made our own that were alittle longer and had more of a baffle and we gained 15-17hp. so i would eaither save up and just buy a can from a performance company or just leave the exh. the way it is, And hop up the motor if you want more power and better sound.
The Box(old racing name)
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October 16th 2009 at 2:26 PM
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bm_zimmer
Starting Member
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9 Posts
Group: Members
Member Since: October 15th 2009
Location: syracuse, ny, USA
Current Sled: 96' xcr 60 sp
2008-2009 Miles: 800
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thanks to all who replied. i just learned something new today. especially about 2-strokes. i will look for a performance can and read through the website that acexlt shared.
thanks again,
brian
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October 16th 2009 at 3:23 PM
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Ugly_old_Poo_kid
techno-bumpkin
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1079 Posts
Group: Members
Member Since: March 18th 2007
Location: Walworth, NY, USA
Current Sled: 05 Edge & Frankenstorm II
2008-2009 Miles: 165
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Cans don't make horsepower, they make noise... The most you'll get over a stock can, is about 3 HP, not worth the cost.
If you want more power, get a set of performance pipes.
95 - Storm 800 - Modded - AKA: FrankenStorm - Totalled near 100mph at Tug Hill!
96 - XLT/SP with Storm 800 trip/trip and now EFI - FrankenStorm II lives...
95 - RXL -- Sale Pending --
05 - Edge 800 long track - Stayin' stock for now..
---------------------------------------------
It made me more compassionate, more empathetic, more nurturing...
I FEEL LIKE I'M TRAPPED IN MY OWN WORST NIGHTMARE!!!
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October 16th 2009 at 4:54 PM
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barney
Junior Member
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205 Posts
Group: Members
Member Since: November 23rd 2008
Current Sled: 2004 Arctic Cat F7
2008-2009 Miles: 2153
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Quote originally posted by Polaris_Parts_MN
^^good answer maxtrax. you dont want free flowing exhaust. the sound waves that go thru the pipe bounce back to the motor to provide back pressure (2 stroke motors need backpressure). no back pressure = less compression in cylinders = poorly running motor, or not running at all, or results in a blown cylinder.
2 strokes get all of the "scavenge effect" from the expansion chamber, Not the silencer.
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October 17th 2009 at 9:06 PM
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bm_zimmer
Starting Member
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9 Posts
Group: Members
Member Since: October 15th 2009
Location: syracuse, ny, USA
Current Sled: 96' xcr 60 sp
2008-2009 Miles: 800
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Quote originally posted by madcow
on that sled i would run a gearing close to 2:1 chain case ratio, leave the exhaust can alone, on that sled its hard to beat stock.
would you please elaborate on how to get my chain case ratio to 2:1. pictures if you have any help alot aswell. thanks,
brian
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October 18th 2009 at 9:24 AM
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i ran a 22 tooth top gear and a 41 tooth bottom gear.
for clutching on mine i ran some 51 gram polaris wieghts, a 160-320 primary spring, very high engagement and wicked hole shot, silver blue secondary spring and a 50-38 helix. on hard pack i could pull a piped 700 twin pretty good.
i made a custom silencer setup for this sled but it was to loud and needed to run bigger mains. you are still better off to stick with stock silencer.
nothing goes like 3 holes!!
Aaen Performance!!!!
High performance engineering
millennium technologies
brtech hoods
price performance
Got Speed Racing
320-629-4889
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