Recent content by Stigapex

Using a straight helix will not let you use maximum angel from start, and then the sled becomes slower in a 660 race. You also must have a very stiff spring to keep belt pressure when fully shifted. That means you are using a stiffer spring than necessary in the start of the helix. Thats why a...

As much weight as possible in front, and at steep as possible in second. I run a 55/46. 52 is to little Sent from my iPhone using Tapatalk

You change is the angle of the track, with different tooth drivers. For best 660ft setup; traction, traction, traction, and then maximum cluthing load. Whatever the sled can handle without missing RPM. It must never hit the rev limiter. I'm geared around 10 mph higher than I expect in final...

Teoretical clutch ratio for Yamaha is around 0,75. Practical around 0,90-0,92 Sent from my iPhone using Tapatalk

You refer to peak numbers, even if it dont mean much ?? You use the peak number to tell your customers; if you buy our kit you will have 258 hp. Alot of people, maybe buying their first turbo-sled, just looking which company will give most hp, and buying from them. Other company, maybe...

2,8 psi adds 40-42 hp. Thats alot, and very nice. I assume the oem muffler is very small (urge). Sent from my iPhone using Tapatalk

144,86/266,5 is 54% 10 years ago standard Yamaha Warrior also delivered 54% of the engine hp to the track. If the Sidewinder have 54% of the engine hp to the track in TD's dyno that will give the engine 196 hp, but I'm pretty sure Yamaha do a better clutch job today, 57% is absolut in the...

Turbo Dynamics dyno show that Sidewinder have 56-57% hp to the track, and I have seen alot of dynos with that number. Sent from my iPhone using Tapatalk

The gain is from 106 to 129 hp. Thats 23 hp. You can use 50% track vs engine. My experience is 57% is more exact. Thats 40 hp gain i engine hp. I have seen reference to dynos from 181 to 212 hp. So everybody could choose their own number. The one I trust most had a dyno run of 188, and then add...

If you hit rev limiter often you will tear the belt apart. Ulmer Racing have a very nice kit to the 290. Worked very well Sent from my iPhone using Tapatalk

12,5:1 AFR is around perfect for 10 psi boost. Over 13:1 AFR is to lean. I never run over 12:1 AFR in my sled, when loaded over 18 psi Sent from my iPhone using Tapatalk

STM helped me with some 72g weights serie X. How much difference will it be beetween x series and the standard supertip. Today i am running supertip standard 60g base weight, with 2 tungsten in tip, and 2 tungsten in middle. 10800 rpm at 18-19 psi. The x series is more agressive. Thinking 25-30...

The chart tells what the turbo can deliver. This turbo works best up to 15-17, but ofcourse it works with higher boost also. Not 30. What kind of turbo cat have used in their sleds, i dont know. Maximum safe boost on pump gas will be 14psi at sealevel at that engine. In hp thats 230 with yama...

Very useful information from lakercr and machzrobbie Sent from my iPhone using Tapatalk

Do this sensor work ok, someone ever had a fault code from the knock sensor ? I think its code 65. I know it should retard ignition, but I dont know how much. What kind of signal is coming from the sensor, only on/off or does it feel a little bit detonation and retard timing a little bit, and...