- Joined
- Apr 17, 2003
- Messages
- 5,474
- Reaction score
- 1,266
- Points
- 2,003
- 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
We did 18 runs at Dynotech on Monday with varying boost from 4 psi to 8 psi and 87 octane fuel to 91 octane fuel. Below is the dynosheet for the 91 octane fuel on 8 lbs boost (measured at the intercooler). We made over 200 hp on 87 octane as well with no signs of detonation! Thanks to DynotechJim!


dieselmatt1
Veteran
cant wait to get mine in - thanks allen

kinger
VIP Member
- Joined
- Jan 17, 2005
- Messages
- 7,409
- Reaction score
- 1,547
- Points
- 1,963
- Location
- Clear Lake, IA
- Website
- www.piergenius.com
Wow that takes guts to run on 87 and actually try it! Even more impressive is you think it will hold together and be reliable, that is my main concern with going turbo, mine with nitrous will run on corn syrup if it had to get me out of the woods, I just cant gurantee that I will have access to 91 on trails I have never been on before in our back packing trips.
Nice job!
PS can you put a detailed post about your kit available with a mini FAQ? I think it would help to have it as a sticky and help new buyers make deicisons!
Nice job!
PS can you put a detailed post about your kit available with a mini FAQ? I think it would help to have it as a sticky and help new buyers make deicisons!
- Joined
- Apr 17, 2003
- Messages
- 5,474
- Reaction score
- 1,266
- Points
- 2,003
- 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
kinger said:Wow that takes guts to run on 87 and actually try it! Even more impressive is you think it will hold together and be reliable, that is my main concern with going turbo, mine with nitrous will run on corn syrup if it had to get me out of the woods, I just cant gurantee that I will have access to 91 on trails I have never been on before in our back packing trips.
Nice job!
PS can you put a detailed post about your kit available with a mini FAQ? I think it would help to have it as a sticky and help new buyers make deicisons!
Kinger, would I recommend 87 octane every day out on the trail? No, but I now know that if you can only get 87 octane at a station you can make it live. We spent 5 hours listening for detonation on each run and fine tuning the fuel system, etc. I am working on a PDF/sticky that can be posted with information, just haven't had a chance to finish it up completely.

Attachments
Skydog
TY 4 Stroke God
TTT NICE!!!!

kinger
VIP Member
- Joined
- Jan 17, 2005
- Messages
- 7,409
- Reaction score
- 1,547
- Points
- 1,963
- Location
- Clear Lake, IA
- Website
- www.piergenius.com
Srxspec said:kinger said:Wow that takes guts to run on 87 and actually try it! Even more impressive is you think it will hold together and be reliable, that is my main concern with going turbo, mine with nitrous will run on corn syrup if it had to get me out of the woods, I just cant gurantee that I will have access to 91 on trails I have never been on before in our back packing trips.
Nice job!
PS can you put a detailed post about your kit available with a mini FAQ? I think it would help to have it as a sticky and help new buyers make deicisons!
Kinger, would I recommend 87 octane every day out on the trail? No, but I now know that if you can only get 87 octane at a station you can make it live. We spent 5 hours listening for detonation on each run and fine tuning the fuel system, etc. I am working on a PDF/sticky that can be posted with information, just haven't had a chance to finish it up completely.
![]()
Nice job!!! Next sled for me will start life in your shop...probably about 3-4 years though. Keep it up!

Similar threads
- Replies
- 8
- Views
- 1K
- Replies
- 60
- Views
- 24K