cat hunter
TY 4 Stroke Junkie
I read in a Quebec snowmobile magazine that Yamaha might add this to there sleds.This magazine was in French so I had a friend translate it.So would YCC-I [YAMAHA CHIP CONTROLLED INTAKE] work on a sled ??? 
rightarm
TY 4 Stroke Master
It would make more sence on a motorcycle than a snowmobile,it's like traction control smoothing out the power when throttle is applied.It varies the velocity stack length to either 65mm or 140 mm. But you never know could happen.
morrisond
Expert
I don't think you have it exactly right, you vary the length of the intake to optimise power. With an fixed intake you always have to make an compromise, either tune it for high end power or low or something in between.
This can help low end torque, or replace it if you lose it when you Rev an engine higher.
This can help low end torque, or replace it if you lose it when you Rev an engine higher.
rightarm
TY 4 Stroke Master
morrisond said:
No I do have it right! same system as the R1 & R6 motorcycle go to the web site and check out the electronically controlled velocity stack.
morrisond
Expert
From Yammies website
"Yamaha Chip Control Intake electronically adjusts intake funnel length between either 65 or 140mm for an amazingly broad, smooth powerband.
It does not function like traction control which either reduces power or applies the brakes to smooth acceleration, it smooths out the power by filling in holes by having an intake of the proper resonant length which is very important on an 4 stroke and is RPM dependant.
At high RPM you want very short stacks to optimize HP and at low RPM very long ones to maximize torque.
Don't ask me why this is so, I don't know.
But I know it doesn't act as traction control.
"Yamaha Chip Control Intake electronically adjusts intake funnel length between either 65 or 140mm for an amazingly broad, smooth powerband.
It does not function like traction control which either reduces power or applies the brakes to smooth acceleration, it smooths out the power by filling in holes by having an intake of the proper resonant length which is very important on an 4 stroke and is RPM dependant.
At high RPM you want very short stacks to optimize HP and at low RPM very long ones to maximize torque.
Don't ask me why this is so, I don't know.
But I know it doesn't act as traction control.
cat hunter
TY 4 Stroke Junkie
So what your saying this would great in a sled. 
morrisond
Expert
Yes it would. Probably be of most use on an High RPM gear reduced Engine,
But over than cost, weight and complexity it would be awesome.
But over than cost, weight and complexity it would be awesome.
rightarm
TY 4 Stroke Master
morrisond said:
Without it power would be like a light switch causing the rear tire to break loose coming off a corner more without it than with it,with the YCC-I it allows the rider to get on the gas earlier and harder without breaking the rear tire loose as much.Trust me I witnessed it all last year during the PARTS CANADA SUPERBIKE SERIES.Unfourtunatly it didn't help we ended up taking both titles anyway.Although not a true traction control it definatly helps,Real traction control usually retardes the timing when it sences wheel spin or a wheelie.
Attachments
morrisond
Expert
Just like the V Twin Ducati's of Old then, They had way more low end end torque and were very progressive so riders could get on the throttle earlier.
Tork
TY 4 Stroke God
I am not sure it would be that useful on a sled, because of CVT if you are being agressive, you are always between say 8-11 K RPM.
On a motorcycle (if you dont down shift) you could be at 4k RPM rolling on full throttle. There things like variable intake and variable valve timing and lift would make a big differance.
On a motorcycle (if you dont down shift) you could be at 4k RPM rolling on full throttle. There things like variable intake and variable valve timing and lift would make a big differance.
cat hunter
TY 4 Stroke Junkie
You guys are more advanced in this stuff than I am but if makes me go faster and get better gas mileage i'm for it!!! 
AndersY
Newbie
High RPM - high frequency - short wave lengthmorrisond said:
Low RPM - low frequency - long wave length
You want to use the compression wave to squeeze in some extra molecules of air before the valve shuts. If you have a constant length, this effect can only be used at a certain RPM, usually where you have power max in a race engine, but with variable lengths, it can be used for a wider RPM-band.
