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BPi FLOW STACK DYNO

BPinitiatives FLOW STACK Dyno PROVEN !


 


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Velocity Stack - How it Works - Project Car TV
A velocity stack is a trumpet-shaped device of differing lengths which is fitted to the air entry of an engine's intake system, carburetor or fuel injection. It is designed to: Allow smooth and even entry of air at high velocities into the intake tract with the flow stream adhering to the pipe walls. Modify the dynamic tuning range of the intake tract by functioning as a resonating pipe which can adjust the frequency of pressure pulses, based on its length, within the tract. Modern engines universally have tuned intake tract volumes and associated resonance frequencies, designed to provide higher than atmospheric intake air pressure while the intake valves are open - increasing the density of the trapped air in the combustion chamber (higher compression). Modified engines often have the original air box and associated ducting removed and velocity stacks are installed as accessories. Modern fuel injection systems with a plenum and single air inlet typically incorporate some sort of radiused entrance, designed to improve power, based on air flow increases. Power gains are usually at higher rpm. In amateur and professional racing, aftermarket velocity stacks are often used, as rules allow, and gains in the order of 2% to 4% can be obtained when inlet radii and stack lengths are optimized for that engine. OEM automotive manufacturers have many regulations to adhere to. One of these is noise. A properly tuned intake tract produces a rather audible intake noise under high airflow conditions - that is commonly "untuned" to allow the vehicle to pass EPA and DOT noise regulations. The length of the stack is known to have a direct effect on a particular engine's Boosted power range. Most current aftermarket stacks are designed to be run "in" the airbox and a company that does research well will have some applications that have all the same length and some applications that have differing lengths of stacks on different cylinders. It is commonly related that "stand off" (air--fuel mix that gets pushed back out of the port, usually at full throttle / low rpm) is somehow captured by installing a longer intake pipe (stack). but, it is actually that the intake valve is closing too late and the combustion chamber is simply overfilling and blowing back out the intake port, before the intake valve closes. A longer inlet pipe will create a later intake pressure wave that will help keep the air in the chamber until the intake valve closes. The acceleration of air flow into a duct is inherently a highly efficient process and the difference between even the crudest radius inlet, and the most aerodynamic shape possible is slight, amounting to no more than a few percent. The flow coefficient of a perfect entry would be 1.0 while the coefficient for a sharp edged entry would be 0.6 and a re-entrant plain pipe 0.5. In practice these latter types of entry are never used for engine intakes. There is always some attempt to provide some radius at the entry. This means that total engine airflow would not increase by the amount suggested by these figures, which apply only to the entry alone, as the inlet end is never the smallest or most restrictive part of the system. Because the greatest losses to flow occur near the valve seat, actual overall gain from any improvement of the entry flow would be much less. In the real world, on high-rpm IR IC engine, using a minimum amount of inlet radius gives the best wave strength and a power Boost of 2% to 4% over a 3000 to 3500 rpm range. Using a larger radius, like 3/4", broadens out the resonant pressure wave rpm range, but the compression Boosting pressure wave is greatly diminished and almost unnoticed by the engine.





V-stacks put on R1
V-stacks installed on R1





AEM Flow Bench Demonstration for Cobalt SS CAI
AEM answers two questions brought up by Cobalt SS owners using AEMs Cold Air Intake System. Specifically, one of our engineers demonstrates how the velocity stack inside the base of AEMs DRYFLOW air filter allows MORE flow through the intake than without a filter (more vacuum = LESS flow, not more!), and demonstrates the robustness of the spring-supported silicone elbow coupler, all on AEMs flow bench.





2004 3.5 5cly Chevy Colorado Dyno Veiw 2
Dyno testing a Truflow Intake with a BPI Velocity Stack (no filter). 10hp and 8tq over stock Thanks Denis and Hybridynamics





ALL MOTOR - 223whp B18CR and 279whp K24/K20 Dyno 2011
Nik'o built ALL MOTOR B18CR making 223whp / 148wtq Yves built ALL MOTOR K24/k20 making 279whp and 208wtq Yvesbuilt PrecisionAutoCanada tuned Untengijutsu Squad Built, not bought !





Untengijutsu Squad - Racing 2011
Untengijutsu Squad racing video of 2011.





Untengijutsu Squad - Run what ya brung ! - Drag racing action 2010
Short video of the Untengijutsu Squad racing on the track. Remember that everything started in the street and it's our main territory. More footage next summer, also more power and more kill video on the track and on the street. Keep it on the street !





Keven Quirion TRIBUTE
A video I made for friends of Kevin Quirion. Eric ''Garrett'' doing a burnout with his AP2 S2000 in tribute to his Kevin and his orange AP2 S2000.





218hp 137tq Built Integra GSR @ IMPORT AUTO PROS
NOTE: MOTOR ONLY HAS 1000 MILES WHEN Dyno TUNING AND USING MOBIL 5000 NON SYS 10W30 OIL ON 91 OCTANE PUMP GAS HERE IS THE SPECS: Head = SLIGHTLY PORTED INTAKE SIDE GSR P72 Competition Valve Job Done By Joe Alaniz. Performances Parts = ALL Supertech Valve Stem Seals and Bronze Valve Guides Supertech Hi-Comp Valves Supertech Dual Valve Springs Ti Retainers ARP Head Studs Blox Tuner Series Type B CamShaft Skunk2 Tuner Series Cam Gears Skunk2 Intake Manifold Skunk2 Alpha 70MM Throttle Body Type R Throttle Cable and Bracket 2.5" Highend Race Header 2.5" Custom Blox Test Pipe 3" Injen Short Ram Intake with Blox Velocity Stack Filter Apexi Noir Exhaust System Drop Engineering Motor Mounts GREEN INSERTS Gates Racing Timing Belt APC 9.3MM SPARK PLUG WIRES 360CC INJECTORS VISION MOTORSPORTS ADJUSTABLE FUEL REGULATOR NGK IX Irdium Spark Plugs Cosmetic Head Gasket Mishimoto Radiator Mishimoto Radiator Hose Flex-a-Lite FAN or FAL FAN Block = GSR B18C1 BLOCK Bore Block DECK AND HONED 81.5MM DONE BY RS MACHINES RS MACHINE PR3 B16 HIGH COMPRESSION PISTONS ARP Rod Bolts Block Guard Type R Oil Pump GSR Water Pump ACL Race Bearings KIT Moroso Oil Pan Mishimoto Thermostat Mishimoto Fan Switch TRANNY: Y21 BELIEVE ITS A B16 TRANNY WITH GSR 5th GEAR I BELIEVE ACT HEAVY DUTE CLUTCH ACT PRESSURE PLATE STOCK FLYWHEEL WALBRO FUEL PUMP P28 TUNED ON CROME





slide show diaporama untengijutsu squad jdm usdm cars
A little compilation of jdm and usdm project cars...All of these car are build by these guys not bought!!!





H22 CB7 Dyno
HATCHing CB7 H22 H22 Dyno, stock internals, stock cams, ported IM, Bisimoto header w/ full 3" custom Exhaust, Blox velocity stack.. tuned on Chrome P28 by Jordan @ jordantuned.com





Koczeka
85.5x89 13.6:1cr Endyn IM IB ported head SMSP Header and Exhaust Rocket M25 cams AEM CAI + BPi stack 258hp





barraute drag 2010 projet video.wmv
Course barraute du samedi matin pour les street cars.Efs2k kevla et sam le pognard a la fin!! untengijutsu squad----------keep it in the street nigga!





b16a dyno
B16a Dynoed at FORCE FED IN LAS VEGAS. First gen b16a in ef chassis Mods intake (home made velocity stack) rs*r open header gsr cams 18* timing In 3 pulls car made 149.33WHP and 106.85 torque This is to the wheels. Car made 137HP and 100Torque with Exhaust on and air filter. So this proves open header does make power, in my car 12WHP and 6 torque. Soon to be convert to obd1 and get a chipped p28 and tune. Car is currently obdo virgin pr3.





FujiRacing All-Motor Miata Dyno @ Titan Motorsports
Built by FujiRacing, Clermont Fl. Raul Rodriguez Puerto Rico 171 RWHP. Redline 8400 RPM's FujiRacing ITB 11:1 CR FujiRacing 45mm ITB's w/80mm Air Horns 38mm Velocity Stacks/choke FujiRacing 11:1 Pistons FujiRacing Racing Cams 304IN/EX10mm Lift FujiRacing 4-1 Header FujiRacing 1 Pc. Cro-Moly Flywheel This Miata was built for Solo 2 Autocross & Touge style events. With the 38mm Velocity stacks 1st & 2nd is is where get the quick acceleration. acceleration. Idles at 1000 RPM's all day long & even after 3 Five lap sessions at Nashville Superspeedway hitting 130 MPH in 95* Heat.





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