BrenTuning Moto Velocity Stacks

[Kam187]

Worthwhile upgrade on a race bike or waste of money?

Bike is being prepped for the 2024 trackday/race season and will be on the rollers in the next few week so debating the above mod but can't find any info on the Gen3.

 

[alex]

Waste of money.
Same with everything they do.

Sent from my SM-S9060 using Tapatalk

 

[scooby]

i had the alpha modded airbox on my gen 3 ( i aasume it's a similar thing?), they cost an absolute fortune from Alpha, but only really work with the whole "race" package. was i able to notice any difference? did i **** . unless your up there,looking for fractions of time/power delivery then theres far better ways to spend your money

 

[scooby]

i had the alpha modded airbox on my gen 3 ( i aasume it's a similar thing?), they cost an absolute fortune from Alpha, but only really work with the whole "race" package. was i able to notice any difference? did i **** . unless your up there,looking for fractions of time/power delivery then theres far better ways to spend your money

 

[alex]

This ^ fractional gains. Spend the money on coaching

Sent from my SM-S9060 using Tapatalk

 

[scooby]

the other thing to add (not sure why/how i double posted), if it is similar to the alpha stacks, then it's there to add bigger power right at the top end, as in 13.5k+ which teh stock engine isn't designed to do (again, it's there for the 6.2/7.2 sbk engines with different cams,gaskets etc), you also lose some mid range around 8-9k, right where you need it!!

 

[Corkgsxr]

I suppose ask yourself will 2 or 3 hp make a difference to you. Unlikely

Velocity stacks move power. Longer more midrange shorter more top end.

Are you going hard enough that cutting midrange doesnt matter?

 

[Zxcv12]

I thought the s1 had 2 velocity stacks, longer at first then they snap up to reveal the short ones at high rpm? Or did I just imagine that?

 

[scooby]

I thought the s1 had 2 velocity stacks, longer at first then they snap up to reveal the short ones at high rpm? Or did I just imagine that?

they do, they are on an active shift,when bike reaches a certain rpm, they lift via a little motor+connecting rod. the modded ones are different heights,both lower+higher funnels.cant remember off top of my head if lower/higher etc, would have to troll thorugh my pics

 

[Zxcv12]

Why not use a stepper motor then and ?trombone? the stacks along with the mapping/revs ??*??

 

[alex]

Video showing how they operate.
Long bodies for torque and low down pull, short for absolute power

 

[Zxcv12]

Nice thanks!

 

[oldwobbler]

I wonder why BMW decided to make it sound like a dog barking each time the throttle bodies move?

 

[alex]

Thought everyone liked a bike that bark'd when you open the throttle?

 

[scooby]

I wonder why BMW decided to make it sound like a dog barking each time the throttle bodies move?

might be a little to subtle for some