News:
HPA MOTORSPORTS INTRODUCES CVP MODULAR
SHORT RUNNER INTAKE MANIFOLD
HPA Motorsports Inc.
7561 - 134A Street,
Surrey BC, Canada
V3W 7B3
P: 604-598-8520 F: 604-598-8760
www.hpamotorsport.com
FOR IMMEDIATE RELEASE
Contact: sales@hpamotorsport.com
SURREY, BC, July 17, 2007 -- The team at HPA Motorsports has been tuning the VR6 engine since its introduction to the North American market the early 1990’s. Through strong partnerships and consistent results, HPA has been an ongoing contributor to the forced induction scene for the 24 valve based motors. At this Spring’s “SoCal R32 Get-Together”, a special preview of the past year’s development was revealed in the form of HPA’s new CVP Modular Short Runner Intake Manifold.
This exciting new product joins our growing line-up sporting the moniker “CVP” or “Calibrated Velocity Port”.
Over the years, it was the “Lego”-like interchangeability of parts among the VW/Audi platforms that facilitated the growth of HPA from a back-yard operation over 16 years ago to the place it shares in the industry today. It was this flexibility that was brought to the table when HPA set out to design the successor to their currently offered HGP developed Short Runner Intake Manifold which would cultivate the base for a future Naturally Aspirated tuning program.
Although focused on Turbocharging for close to a decade, the development of a dynamic Naturally Aspirated tuning program for the VR6 motor has been long in the works. Much to the credit of the Engineers in Wolfsburg responsible for the development of the current 3.2L offering, there has been little room for improvement with the roster of conventional bolt on parts available on the market; until now.
With only a few bolts, the modular design of the CVP intake manifold allows for easy expansion or re-configuration as your project car evolves. Compatible with various forced induction applications, use the long neck, to maintain your factory throttle body position or use the left or right short neck to position the throttle body closer to your intercooler for shorter boost travel and improved responsiveness.
Available in three configurations to best suit the unique packaging constraints of your project car, the CVP is in ALL arrangements a “Short Runner” intake manifold by definition that runner length always refers to the distance from the Plenum to the face of the cylinder head. In comparison, The OEM 3.2L intake manifold is defined as a Variable Path/Resonance Intake Manifold, with a Long Runner configuration and an innovative piggy back plenum called the Performance Port which replicates the short runner effect at high RPM.
Design Theories
The 3.2L VR6 is a unique motor that shares as many design obstacles as benefits for tuners in the aftermarket. Originally designed to occupy the same space as a 4 cylinder motor, all 6 cylinders are standing nearly vertical and share a single cylinder head. A 15 degree offset, 10.5 degree V and an 11mm offset crank shaft with corresponding calibrated cams are only some of the design innovations to be found when setting out to tune the 3.2L VR6.
OEM Variable Path/Resonance Intake
The factory long runner configuration builds torque in the 900 to 4100 RPM range and the smaller performance port feeds the intake valves in the higher RPM. This design offers a good working compromise for the 3.2L engine, but does not directly address the imbalance of pressure found between the intake ports of the rear three cylinders and the front three.
CVP Short Runner Intake
HPA’s goal was to develop an intake manifold that could be configured to mate with any forced induction product, and be the foundation on which to build a Naturally Aspirated program. With a volume optimized plenum, the short runners were calibrated to equalize the large pressure wave’s imbalance between forward and rearward cylinders in the mid to high RPM range found on the OEM intake. This reclaimed differential balanced the high pressure wave and maximized air velocity at each valve seat. Maximum potential horsepower will be realizable under naturally aspirated or forced induction applications through CVP’s runner design.
The long neck/short neck throttle body configurations were assembled to build-in throttle response options. The closer the throttle body is to the plenum; the better the throttle response. With the OEM intake, the throttle body is the furthest away from the piggy back plenum and results in less crisp tip-in response at higher RPM, but maximizes low end torque. HPA’s balanced long neck preloads the plenum and groups each set of cylinders with matched pressure to build back in throttle response and minimize torque loss.
The CVP’s “Calibrated Velocity Port” design has maximized the “ram effect” in the upper RPM range, and when combined with the appropriate cam profile, will serve as the most horsepower productive first step in tuning your 3.2L VR6; regardless of the plotted direction; naturally aspirated or forced induction.
Performance Figures:
The CVP is not intended as a stand alone product, but rather an integrated part of your total tuning package. When used with various hardware and software combinations, different performance gains will be had. Future product offerings from HPA to compliment the CVP Intake Manifold will be forthcoming in the months to follow, and the CVP will be integrated in future renditions of our FT series of turbo systems.
Even though HPA’s official software tuning to optimize the characteristics of the manifold’s air flow had not yet been developed, we took the opportunity to install the CVP on a 2007 3.2L DSG equipped VW EOS. On 91 octane fuel with OEM software, this front-wheel-drive vehicle base-lined 201 hp on a Dynojet dynamometer. Without un-strapping from the dyno, we installed the CVP Intake Manifold and retested the car; achieving back-to-back pulls of 217 and 213 hp, displaying a smooth linear hp increase from 4500 RPM through to redline.
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