Description:

Racing velocity stacks  developed on dynotune (Dynojet i250) and tracks,designed to use on circuits and driveways. Prohibited use on public roads

• Increase power and torque at the mid and high rpm

• Greater rapidity of the engine to increase the revs on the whole power range

• Greater reactivity of the engine during the throttle openings

•  Reduces the power decay of the engine toward the limiter

• Amazing intake sound

Dynamometers results:

Test with locked variator :

Power/Rpm

Torque/Rpm

Test with unlocked variator:

Power/Rpm

Speed/Time

Contents of a package:

• 2 racing velocity stacks racing made by CNC machines
• 2 rubber gaskets
• assembly instructions

Warnings:

The kit increases the air intake into the engine so may need to adjust the AFR (air-fuel ratio)

More Air =  AFR lean

Shipping & Returns

Payment methods

Technical Development

What does it mean AFR?

Other results from our costumers:

Yamaha T-MAX 2008 head tuned, Throtthle body of 34mm, bmc filter, Termignoni exhaust no db killer, external velocity stacks modified, dynojetpowercommander with ignition module

Red Line =stock kit with AFR tune

Blu Line = Venturisystem kit with AFR tune

Tested by : Magistrati Racing Savona

Other results from our costumers:

Yamaha T-MAX 2008 head tuned, Throtthle body of 34mm, 560 Malossi

Red Line =stock kit with AFR tune

Blu Line = Venturisystem kit with AFR tune

Tested by : Magistrati Racing Savona