muskrat
Pro
Can someone please tell me at what throttle setting do you achieve full boost? If you are set up for 8 pounds should that be at half throttle or where? Thank you if you can help.
MM
MM
Full boost should be achieved at full throttle
muskrat
Pro
hi
OK, I am getting full boost at half throttle, how do I adjust that?
MM
OK, I am getting full boost at half throttle, how do I adjust that?
MM
uphigh said:
Not all the time. Boost is created with load. I can max boost within 100 feet and i'm not max rpm yet. If you lose traction and spin your boost will come up faster. What's boost set at max now?
muskrat
Pro
boost
Max is at 8 or 10 depending on switch position. If I give it 1/8 throttle I am seeing about 4 psi then two...if I give it 1/2 throttle I see 8 psi then it drops as speed picks up, it only drops to like 5-6. Is this normal, it seems to run great. Using a lot of gas, Broke a track tention bolt so fixing that right now. Literally smoked the Hyfax at 120 mph plus so new ones going on and a couple of slightly bigger wheels. Hope it doesn't get too warm and melt the snow.
MM
Max is at 8 or 10 depending on switch position. If I give it 1/8 throttle I am seeing about 4 psi then two...if I give it 1/2 throttle I see 8 psi then it drops as speed picks up, it only drops to like 5-6. Is this normal, it seems to run great. Using a lot of gas, Broke a track tention bolt so fixing that right now. Literally smoked the Hyfax at 120 mph plus so new ones going on and a couple of slightly bigger wheels. Hope it doesn't get too warm and melt the snow.
MM
TBird
Expert
- Joined
- Dec 25, 2004
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- Location
- North of Sweden
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- Sweden
- Snowmobile
- Yamaha Viper and Yamaha Nypex
That is normal, as flybyu wrote, boost is created with load!
Thats why you can't tune boost with back of sled rised off ground, there's not much load applyed.
As you accelerate you will see more boost then when keeping speed because it's more load.
Klimbing a steep hill with good traction will give highest boost readings.
Hitting throttle with bad traction will give you much less load = less boost.
Thats why you can't tune boost with back of sled rised off ground, there's not much load applyed.
As you accelerate you will see more boost then when keeping speed because it's more load.
Klimbing a steep hill with good traction will give highest boost readings.
Hitting throttle with bad traction will give you much less load = less boost.
muskrat
Pro
thanks
Thanks for the info,,,,looking at my Innovate wideband components now, very cool stuff. Ride on
MM
Thanks for the info,,,,looking at my Innovate wideband components now, very cool stuff. Ride on
MM
are you running boost controller? Do you have a blow off valve?
muskrat
Pro
BOV
No boost control, just a two position switch that bleeds air, have a BOV but not installed yet. Putting in wideband gauge this weekend ....I hope. A dial type boost gauge would be nice but need to getthis other stuff done first.
MM
No boost control, just a two position switch that bleeds air, have a BOV but not installed yet. Putting in wideband gauge this weekend ....I hope. A dial type boost gauge would be nice but need to getthis other stuff done first.
MM
a blow off is always a must as it will save fuel, keep your throttle bodies from blowing off. I run a turbosmart dual boost controller that has a switch you mount for low and high settings that you preset
muskrat
Pro
BOV
That would explain the fuel consumption, I thought it was my thumb.
MM
That would explain the fuel consumption, I thought it was my thumb.
MM
And yes heavy thumbs waste fuel. LOL
Ted Jannetty
TY 4 Stroke God
Re: hi
That is because your Boost Gauge is connected to your intercooler, you need to connect it to your Carb Boots so you can measure the pressure the engine is seeing on the other side of the butterflys.
Ted.
muskrat said:
That is because your Boost Gauge is connected to your intercooler, you need to connect it to your Carb Boots so you can measure the pressure the engine is seeing on the other side of the butterflys.
Ted.
samrx1
Veteran
Re: hi
Ted.
at full throttle does it have the same boost at intercooler and carb boots
Ted Jannetty said:
Ted.
at full throttle does it have the same boost at intercooler and carb boots
Ted Jannetty
TY 4 Stroke God
It should unless there is a restriction in the throttle blades.
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