Loosening your track helped quite a bit huh, can't believe how loose my buddy runs his F7, bet he has 3" sag and no weight, I'm a little scared to try that with studsIve got a 06 700 Fusion. Check your track tension. The book calls for 3/8 to 1/2" at a point 16" from the rear wheels with a ten pound weight on the track. There was an addendum that should have been included with the manual that changed the factory spec to 1" to 1 1/8 "with 10 pounds. I am currently running about 1 1/8" with NO WEIGHT and it made a huge difference in top end. Before I was only getting about 93 mph. After loosening the track I was seeing yesterday 104 mph on the speedo which was actually 101 mph on the gps. This was on soft pack on a mile long lake run with temps about +2 F.[/b]
On ice i hit 113 every thing was stockSnow conditions is the biggest factor.
I (05 900 Fuse) run 112-114 on very hard pack and/ or mostly ice. Seen these speeds a kazzilion times.
100 +/- or so on fresh powder. You'll never get great speed on fresh poowder.
Stock motor. Stock clutching. '111 Belt. Stock deflection. Have changed to 719 Helix/delrin washers end of last year with No improvement on top speed yet but clutches way better on trails. 144 studs/6" shapers/stock skis.
Watching digitial tach (not going by recall) at WOT it consistently stays at 7400-7450rpm.
And yes, track tension was screwed on most 05' deleveries for spec was listed incorrectly. I have 1" sag with no weight. Am planning to play with this and deflection when we get ideal hardpack back on the lake.
TPS checked and within spec's. Some Fuse's are out of spec and need adjusting. This can also be big factor between a ho-hum Fuse and a fun one.[/b]
Altitude zaps power, luckily I'm (house+lake) only at 400 ft above seal level.103 on GPS, TPS in spec, track with at least 1 1/8" sag with no weight, 719 helix. That is on hard packed snow. Wish I could get to at least 110 or 115.[/b]
114 - 05 stock + after market can.116-118mph on hardpacked snow.[/b]
What kind of set up do you have to get 120 mph on gps I too have an 05 fusion and cannot break 100 mph on the speedo??The 900 can get to 120 GPS if it's sorted out right....and I have not yet tightened my F-7's track since I bought it new...it ratchets a lil if I give it too much off the line, but up top it flys. 4100 miles...lol..no studs..[/b]