Viper Top Speed

[Yamadog]

I was running my Viper on Lake Vernon (West end of the lake). We cut test holes every 500 feet and had 5.5 - 6". My last pull of the day I saw 102 mph. ( on speedo) I only have 55 miles on the sled so I expect it will get a bit faster. I would like to add boost to my sled, but $4000 -$5000 is a lot of cabbage. How reliable are these sleds after boost. I do a lot of Trail riding so reliability is important. Looking at supercharger over turbo. Any thoughts?

I do not know of a supercharger yet for the viper. I think there is a challenge for getting it to fit under the bodywork and access to a drive location for the belt.

All 4 or 5 manufacturers are presenting turbo kits

 

[snowbeast]

See guys I knew this sled even stock would break 100 mph gps,and you guys were all worried,its the yammie clutching.

 

[journeyman]

See guys I knew this sled even stock would break 100 mph gps,and you guys were all worried,its the yammie clutching.

I am a fan of the Yamaha clutches myself. Recently I read a report saying the early testers thought the Cat 7000 had more aggressive clutching.....maybe just in acelleration though.

 

[ROCKERDAN]

Jamie just added a MCX to his Dads Viper...

http://www.dootalk.com/forums/topic/651 ... lity-poor/

Dan

 

[09nytro]

Been looking at that over there as well !

 

[SledFreak]

whats it geared for?

 

[snowbeast]

I know everyone doesn't cares about top speed but for all those speed junkies out there here is what happened with the viper.

Conditions were near perfect with a dusting of snow on the lake and no wind. I had about 45 miles on the sled before I decided to do this and it is stock with 144 studs. I was running about 0.6 miles and got 107 mph multiple times with a GPS. The speedo is right on...it was reading 107 as well. Rpms at this speed were around 9000, so with a little clutching there shouldn't be a problem getting it over 110 in the same conditions.

To compare I pulled the 2013 apex(Stock with 2500 kms) out and it ran 118 mph (GPS). Right on what it was doing last year.

There is a guy on the lake that had a 2013 ski-doo 1200 with a header and clutching and he ran 113 mpg(GPS) in similar conditions last year. I think with a few mods on the viper you shouldn't worry about the 1200.

I am heading to Hurricane Performance to get the turbo installed Wednesday so I wanted to get some base numbers before it was installed. I will post some #'s after it's installed.

Now is the rtx a shortie like a 129" track or is it a 137" reason i ask is the shortie may be geared taller than a longer sled,just wondering if you are considering gearing up with your new turbo power you are about to install.

 

[newtron]

I know everyone doesn't cares about top speed but for all those speed junkies out there here is what happened with the viper.

Conditions were near perfect with a dusting of snow on the lake and no wind. I had about 45 miles on the sled before I decided to do this and it is stock with 144 studs. I was running about 0.6 miles and got 107 mph multiple times with a GPS. The speedo is right on...it was reading 107 as well. Rpms at this speed were around 9000, so with a little clutching there shouldn't be a problem getting it over 110 in the same conditions.

To compare I pulled the 2013 apex(Stock with 2500 kms) out and it ran 118 mph (GPS). Right on what it was doing last year.

There is a guy on the lake that had a 2013 ski-doo 1200 with a header and clutching and he ran 113 mpg(GPS) in similar conditions last year. I think with a few mods on the viper you shouldn't worry about the 1200.

I am heading to Hurricane Performance to get the turbo installed Wednesday so I wanted to get some base numbers before it was installed. I will post some #'s after it's installed.

Now is the rtx a shortie like a 129" track or is it a 137" reason i ask is the shortie may be geared taller than a longer sled,just wondering if you are considering gearing up with your new turbo power you are about to install.

Just got the turbo installed today. Its a RTX 129". Dave said the RTX and LTX are the same gearing but the XTX is lower. I am going to do some testing this weekend to see what kind of numbers it will run. Dave said the taller gears are not available yet so until then I guess I am stuck with the stock gearing. I want this this thing to run over 120 mph so yes I will be gearing up when the gears are available

 

[snowbeast]

I know everyone doesn't cares about top speed but for all those speed junkies out there here is what happened with the viper.

Conditions were near perfect with a dusting of snow on the lake and no wind. I had about 45 miles on the sled before I decided to do this and it is stock with 144 studs. I was running about 0.6 miles and got 107 mph multiple times with a GPS. The speedo is right on...it was reading 107 as well. Rpms at this speed were around 9000, so with a little clutching there shouldn't be a problem getting it over 110 in the same conditions.

To compare I pulled the 2013 apex(Stock with 2500 kms) out and it ran 118 mph (GPS). Right on what it was doing last year.

There is a guy on the lake that had a 2013 ski-doo 1200 with a header and clutching and he ran 113 mpg(GPS) in similar conditions last year. I think with a few mods on the viper you shouldn't worry about the 1200.

I am heading to Hurricane Performance to get the turbo installed Wednesday so I wanted to get some base numbers before it was installed. I will post some #'s after it's installed.

Now is the rtx a shortie like a 129" track or is it a 137" reason i ask is the shortie may be geared taller than a longer sled,just wondering if you are considering gearing up with your new turbo power you are about to install.

Just got the turbo installed today. Its a RTX 129". Dave said the RTX and LTX are the same gearing but the XTX is lower. I am going to do some testing this weekend to see what kind of numbers it will run. Dave said the taller gears are not available yet so until then I guess I am stuck with the stock gearing. I want this this thing to run over 120 mph so yes I will be gearing up when the gears are available

Which stage turbo did you get,stage 1 190 hp or stage 2 250 plus,either one will put a smile on your face,but one will be better off with stock gears the other I would change for sure.

 

[newtron]

It's a stage 1 190 hp. Do a lot of trail riding so looking for a little reliability and can use pumped gas. I had it out last night and it pulls really hard. Dave set me up with his clutching and with the short run I did it doesn't seem like its going to run out of gear. Didn't take long to hit 95 mph

Anyone know where a man could get a taller gear for this sled if needed??

 

[Yamadog]

gears are not available yet but I found a guy who cuts gears for tractor pulling an he can order blanks and cut any pattern we want.

 

[YamahaTim]

gears are not available yet but I found a guy who cuts gears for tractor pulling an he can order blanks and cut any pattern we want.

Let me know...

 

[Yamadog]

Oh I will

 

[NOS-PRO]

I just read the XTX gearing is different, does anyone know the gearing ratio of all the Vipers? I will need gearing later on for asphalt racing. Turbo to come this spring also.

 

[loudelectronics]

XTX is 21 and 41. Read that the LTX is 23 and 41 but that was pre production. Someone with an LTX or RTX will have this information from the spec sheet.