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Transfer ports
- Cleaning them up with a grinder
started by JohnRXL
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October 22nd 2009 at 5:38 PM
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JohnRXL
Junior Member
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121 Posts 
Group: Members
Member Since: March 23rd 2005
Location: Ontario, Canada
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Before I put my 650 Tripple motor together for my 93 RXL I was thinking of cleaning up the transfer ports with a small die grinder. Has anyone else done this and get anything out of it performance wise??
If it ain't broke, MOD it!!
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Site Supporter
Group: Site Supporters
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October 22nd 2009 at 6:41 PM
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scumpman
temporarily out of order
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690 Posts 
Group: Members
Member Since: October 12th 2004
Location: FAIRBANKS, AK, USA
Current Sled: '03 Indy 500
2008-2009 Miles: bout 800
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I've done this, polishing the ports with a dremil tool and grinder/sander bit.. just smoothed out the passages.. can't really notice any difference but hear it's supposed to be better for the airflow and such..
'03 Indy 500 sks (Scumpman's Kicka** Snowmachine) extended skid/track to 136" from TracksUSA, AC roller clutch, Holtzman Tempaflow, clutched and geared, 2" risers, skidplate, old Pol rack.
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November 1st 2009 at 5:21 PM
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mitchxc700
#634
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65 Posts 
Group: Members
Member Since: November 16th 2007
Location: cambridge, mn
Current Sled: xc 700, 01 prox project,
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thats a very risky move if you have never done it! you take to much out and that jug is junk!! thats y its expensive to have some one do it. but you wont notice much diff unless ur running aginst the same sled thats stock or a dyno. its good in the long run if your doing mor mods
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November 1st 2009 at 5:49 PM
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THE_Norwegian
:)
THE_Norwegian got some SLP powder pro skis in the mail today :-D.
Updated Yesterday at 5:32 PM
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444 Posts
Group: Members
Member Since: January 29th 2008
Location: Norway
Current Sled: ET 340 and XCR 440
2008-2009 Miles: 2500KM :-D
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if there are much casting errors, do it ! :) but be very carefull, dont remove moore metal than neccesary, only the bumps and lumps from the casting. and dont touch the port windows.
and dont make the sufaces to smooth, it needs to be a little rough...
* XCR 440 *
"I`m not picking my nose.. I´m porting my head!"
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November 1st 2009 at 6:46 PM
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shortstop20
I NEED SNOW!!!!
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3835 Posts 
Group: Members
Member Since: August 9th 2004
Location: Stickney, SD, USA
Current Sled: '09 Summit XP 800R 154" X
2008-2009 Miles: 400
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There are some that believe the roughness mixes the fuel/air mixture better than smooth. Just an FYI. Who's right, I have no idea.
2009 Ski-Doo Summit XP 800 154" X package - Quick Clickers, Between the Lines Designs Ice Scratchers, Tunnel & Rail Stiffeners
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November 2nd 2009 at 8:38 PM
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440_jag
450 horse ditch bannger
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1488 Posts 
Group: Members
Member Since: July 30th 2007
Location: Galesville, wisconsin, USA
Current Sled: 2002 zr 500 cce
2008-2009 Miles: 500
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Well it would make more sense to me that some roughness would keep the air fuel spinning better to keep it atomized. I dont have proof but thats what i believe
2002 Zr 500 CCE
D&D pipe ported polished y 6 inch riser Acerbis Handguards Chrome winshield Pro-glider Rack Rsi pad Ripped graphics Fox snow pro shocks clickers
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November 3rd 2009 at 7:27 PM
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Ugly_old_Poo_kid
techno-bumpkin
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1074 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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Having the surface rough with the large fuel droplets from a carb, can keep the droplets suspended in the air instead of settling to the surface.
But with the smaller atomized particles from an injector, turbulence is, well, turbulence, and will impede airflow.
YMMV
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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