welterracer
TY 4 Stroke God
Just curious!
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
curious because you saw what the 05 F7 & Mach Z ran? Lemme just tell ya we can run with them! 
Allen
Allen
welterracer
TY 4 Stroke God
Yup.. Not that im expecting to beat a mach z... I know they will be FAST!!
LazyBastard
TY 4 Stroke God
They said the same thing about the rev800 and it turned out to be a turd.
TopGunn
Pro
lol so cmon guys whats the numbers?LazyBastard said:
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
05 F7 on wet grass has been running 97-98 & mach has been running 102.
jimmie d
TY 4 Stroke Master
Is there anybody with a pure stock RX1 that would run 1000' and keep track of speed? Doubt it 
Jim
Jim
2xcelr8
Extreme
1000ft ice radar run last year,with 192 trail studs=97-98mph. Bill
1000' on radar 1" track no studs my big butt 95.2 mph.
DaveyBoy
TY 4 Stroke Guru
I have a 03 192 studs on radar 112 i weigh 230 and sled is stock 1000ft on ice no mods 
peakperf
Extreme
- Joined
- Oct 1, 2003
- Messages
- 67
- Location
- Hayward Wisconsin
- Country
- USA
- Snowmobile
- 1972 GP292, 1972 GP433, 1972 GP643, 2003 RX1, 2007 Phazer GT
104.5 MPH in 1000 ft on ice 144 trail studs. "Kinda stock."
Scott
Scott
RX-Dave
Expert
- Joined
- Nov 14, 2004
- Messages
- 308
Srxspec said:curious because you saw what the 05 F7 & Mach Z ran? Lemme just tell ya we can run with them!
Allen
I saw that when Billy Howard posted it. If the F7 is stock, I would say that the Mach is not as impressive asI thought it would be. 4mph more, for a sled that costs a measly $6000 more? What a bargain!
But you have to consider, that SDI system is going to have most of the guys tied down performance-wise for awhile. Not like they will be able to get drastic with porting and pipes and not be able to tune the EFI.
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
The SDI fuel control boxes (to add and remove fuel throughout the curve) have already been made and are currently being tested.
Both the 05 F7 & Mach were box stock, not all that surprising considering the F7 weighs around 470 lbs & 145 hp and the Mach is 520 lbs & 165 hp.
Both the 05 F7 & Mach were box stock, not all that surprising considering the F7 weighs around 470 lbs & 145 hp and the Mach is 520 lbs & 165 hp.
Blue Me
TY 4 Stroke Junkie
1000' = 216MPH......let that rumor get started!!! 
Newcastle Scott
Veteran
Speed after 1000 feet is 126mph.
Free Fall
Terminal Velocity = sqrt ( 2 * m * g / c * p * A)
where
m = 318.18 RX-1 mass in (kg) (tank full and 2 beers under tool kit)
c = 1.5 drag coefficient - constant
m = 1 Thickness in meters
1 m diameter in meters
A 1 m^ cross-sectional area as seen from below
g 9.81 m/s^2 acceleration of gravity
p 1.2929 kg/m^3 density of air
m/s 56.73588623 m/s
mph 126.1849013
Free Fall
Terminal Velocity = sqrt ( 2 * m * g / c * p * A)
where
m = 318.18 RX-1 mass in (kg) (tank full and 2 beers under tool kit)
c = 1.5 drag coefficient - constant
m = 1 Thickness in meters
1 m diameter in meters
A 1 m^ cross-sectional area as seen from below
g 9.81 m/s^2 acceleration of gravity
p 1.2929 kg/m^3 density of air
m/s 56.73588623 m/s
mph 126.1849013
