» Site Navigation |
|
»
»
»
|
|
» Buyers Guides |
|
|
|
» Network Links |
|
|
|
 |
01-20-2004, 03:32 PM
|
#1
|
|
oldslowsledder
Join Date: Mar 2003
Location: Parry Sound,Ontario
Primary Sled: 2010 GSX, wife 08 Vector
Where I sled: North of Parry Sound
Posts: 6,488
|
I am doing some work on a friends 94 G T 583. As I pulled the carbs apart I notice they have different size main jets.270{PTO side}, and 260 {MAG side}. I then looked in the manual and it says this is how it comes from the factory. Why is this? Thanks Cory
__________________
2010 GSX
Wife 08 Vector
Son 2012 Nytro XTX
|
|
|
|
Sponsored Links
|
Advertisement
|
|
|
01-20-2004, 03:37 PM
|
#2
|
|
Member
Join Date: Jan 2004
Location: Central Maine
Primary Sled: 1998 Arctic Cat Cougar
Where I sled: Maine
Posts: 50
|
Cory, it's because in that motor the PTO side cylinder burns hotter than the mag side, so that's how they compensate for that.
__________________
1998 Arctic Cat Cougar
1999 Arctic Cat Z 440
1995 Ski Doo Formula STX LT
|
|
|
|
|
01-20-2004, 03:54 PM
|
#3
|
|
journeyman sled/motorhead
Join Date: Mar 2001
Location: Indiana/Irons michigan
Mileage: 282
Primary Sled: 06 renegade 800 HO
Where I sled: Irons michigan,or where there is snow
Posts: 4,440
|
Quote:
Originally posted by A_C_Man@Jan 20 2004, 03:37 PM
Cory, it's because in that motor the PTO side cylinder burns hotter than the mag side, so that's how they compensate for that.
|
bingo,if you work on any triples you will see it is very common.
__________________
"DREAM AS THOUGH YOU'LL LIVE FOREVER, LIVE AS THOUGH YOU'RE GOING TO DIE TOMMORROW" JAMES DEAN
|
|
|
|
|
01-20-2004, 04:02 PM
|
#4
|
|
Super Moderator
Join Date: Mar 2002
Location: Apsley, Ontario
Mileage: 4406 Miles
Primary Sled: 2007 Ski-doo MXZ 600SDI Black/Yellow
Where I sled: Paudash, TATA & Northern Corridor
Posts: 8,771
|
Rotary valve motors are always jetted this way.
I have been told the fuel is lower in the port as it goes past where the RV disc passes. The disc cuts off the bottom portion of the port first on the PTO side. The MAG side the disc comes down from the top, so no fuel is lost.
Has anyone heard this explanation before?
|
|
|
|
|
01-20-2004, 04:30 PM
|
#5
|
|
Senior Member
Join Date: Mar 2001
Location: New Liskeard, Ontario
Where I sled: Ofsc District 11-12-14
Posts: 900
|
I have been told that its usually because the clutch generates significant heat and some of its heat is passed into the pto cylinder causing it to run a bit hotter so its jetted a bit richer to compensate...what ive been told..dunno..its just the way it is..steve
__________________
Ride..
|
|
|
|
|
01-20-2004, 06:00 PM
|
#6
|
|
Senior Member
Join Date: Mar 2001
Location: southwestern ontario
Posts: 685
|
CORY9: revrnd has the correct answer, the fuel molecules are heavier than the air so they stagger the jetting because as the R.V. rotates, it closes the bottom half of the PTO crankcase port first therefore it has to be richer and the MAG port closes @ the top first therefore and can be slightly leaner. The triple piped engines (reed valves) are staggered because of pipe temp and coolant flow. Dino
|
|
|
|
|
01-20-2004, 06:52 PM
|
#7
|
|
Super Moderator
Join Date: Mar 2002
Location: Apsley, Ontario
Mileage: 4406 Miles
Primary Sled: 2007 Ski-doo MXZ 600SDI Black/Yellow
Where I sled: Paudash, TATA & Northern Corridor
Posts: 8,771
|
Dino, that's what I meant to say :thumbsup:
|
|
|
|
|
01-20-2004, 09:45 PM
|
#8
|
|
Senior Member
Join Date: Mar 2001
Location: Sudbury,Northern Ont
Mileage: 1268
Primary Sled: 01 ZR 600 VEV
Where I sled: Chelmsford,Northern Ont
Posts: 4,869
|
The 95-96 Mach 1 is diferent though
The Twin pipes compensate
BTW the 94 Grand Touring 580 has the 582 not the 583
__________________
Current sled 01 ZR 700 X
3.5 Oles Machine riser,1.25 ripsaw,388/389 rear springs,45deg hooks,Shell Utra Oil
Previous sleds-69 Dauphin--71 SW 396--75 GPX338--85 Safari 447--87 Safari 377
89 Safari Scout E--84 SRV 540--86 SRV 540--91 Indy 500--87 Indy 400
2nd 91 Indy 500 --95 STX 583-- 01 ZR 600 VEV
Current weather in Chelmsford
|
|
|
|
|
01-21-2004, 09:15 AM
|
#9
|
|
oldslowsledder
Join Date: Mar 2003
Location: Parry Sound,Ontario
Primary Sled: 2010 GSX, wife 08 Vector
Where I sled: North of Parry Sound
Posts: 6,488
|
Thanks for the responses guy's, it now makes sense..
__________________
2010 GSX
Wife 08 Vector
Son 2012 Nytro XTX
|
|
|
|
|
02-19-2004, 11:24 PM
|
#10
|
|
Super Moderator
Join Date: Mar 2002
Location: Apsley, Ontario
Mileage: 4406 Miles
Primary Sled: 2007 Ski-doo MXZ 600SDI Black/Yellow
Where I sled: Paudash, TATA & Northern Corridor
Posts: 8,771
|
The 'doo manual shows that PTO is the rich side.
|
|
|
|
| Sponsored Links |
Advertisement
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
