Stage 2+ 2.8 12V throttle body...

VAP · 03-27-2003, 07:35 AM

This is THE one! The most radical 2.8 12V throttle body available for a street driven or dual-purpose car. There is nothing that remains that I know of that can flow more, smoother air that won't compromise low-end torque.

This particular throttle body is going out to someone today and I'll let him identify himself if he chooses.

This throttle body features a velocity stack that is longer than Stage 1 units which serves two beneficial purposes. First it allows for a higher charge air velocity due to it's additional length and two angle tapered sleeve. Secondly it locates the velocity stack inlet into a "sweet spot" in the plenum that allows for a smoother, less turbulent transition as it enters the velocity stack.

All stock butterfly screws on this unit are replaced with grade 8 screws that I grind to spec and install which allows a shorter screw and a lower profile in the butterfly shaft which in turn allows more air to flow by them. They are also an allen-head screws which offers smoother flow over the heads than a stock phillips head screw without all the tedious and time-consuming grinding of the screw heads and protruding tips. Easier/faster/more efficient to make em than to grind em when doing both sides instead of just the protruding tips.

This throttle body also features dual molded epoxy air foils on both sides of the velocity stack to flow more air into the secondary throttle bore. The transition is much more contoured and smoother than the "flat" area provided for in the stock throttle body. When finished the epoxy is then sealed with a polyurethane sealer/clear coat to further smooth it. This showed some pretty incredible results on the flow bench!

Additionally the TB butterly linkage is re-worked so the butterflies open a true 90 degrees, perfectly parallel to the bore at WOT. Stock Audi butterflies do NOT open all the way especially on the secondary side.

I'm including a steel MAF inlet with this TB so it's affect can also be measured in a before/after dyno run.

An objective and unbiased dyno result should be available in the next week or so by this throttle body's owner. Then we'll know if it's a worthwhile addition.

VAP · 03-27-2003, 07:38 AM

VAP · 03-27-2003, 07:40 AM

VAP · 03-27-2003, 07:43 AM

VAP · 03-27-2003, 07:45 AM

VAP · 03-27-2003, 07:48 AM

SlammedA4 · 03-27-2003, 07:53 AM

Please keep us up-to-date with the gains/price.

Thanks!!!

Ryan Herrmann
Director of Marketing - Minnesota Audi Club

VAP · 03-27-2003, 07:54 AM

Ran out of spare plastic ones so had a friend in a muffler shop 'swage' me one out of some 3" steel exhaust tubing then trued it up on the lathe at both ends and polished it. This way I'll know if it adds anything like my butt dyno says it does.

If it works I'll turn up a flange out of aluminum and make these by heating #" O.D. ABS plastic and pressing them over the flange to form the bell-mouth then truing up the ends on the lathe.

Mr.D-'97 A4q 12v · 03-27-2003, 08:33 AM

brand newbie · 03-27-2003, 02:37 PM

WOW! looks like it will do nothing, Is this a TDL part

03-27-2003, 07:38 AM	#2
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 2: view from top of screws and air foils

03-27-2003, 07:40 AM	#3
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 3: WOT shaft profile

03-27-2003, 07:43 AM	#4
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 4: Bottom pic of allen screwheads in shaft

03-27-2003, 07:45 AM	#5
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 5: Airfoils

03-27-2003, 07:48 AM	#6
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 6: velocity stack two-stage taper/airfoils

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03-27-2003, 07:53 AM	#7
SlammedA4 Junior Member Garage is empty, add now Join Date: Sep 2000 Posts: 739	DAY-UMMMM!!!! That is SWEET!!! Please keep us up-to-date with the gains/price. Thanks!!! Ryan Herrmann Director of Marketing - Minnesota Audi Club __________________ Ryan Herrmann Minneapolis, MN Member of the Minnesota Audi Club www.mnaudi.com

03-27-2003, 07:54 AM	#8
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Pic 7: MAF inlet Ran out of spare plastic ones so had a friend in a muffler shop 'swage' me one out of some 3" steel exhaust tubing then trued it up on the lathe at both ends and polished it. This way I'll know if it adds anything like my butt dyno says it does. If it works I'll turn up a flange out of aluminum and make these by heating #" O.D. ABS plastic and pressing them over the flange to form the bell-mouth then truing up the ends on the lathe.

03-27-2003, 08:33 AM	#9
Mr.D-'97 A4q 12v Member Garage is empty, add now Join Date: Jun 2002 Posts: 8,112	Thanks UrS4. Can't wait to get it installed! =) __________________ ***** '05 Boxster S (Speed Yellow) '97 A4 2.8Q 12V (Cactus Green) Mods? I got 'em. Baltimore, MD

03-27-2003, 02:37 PM	#10
brand newbie New Member Garage is empty, add now Join Date: Mar 2003 Posts: 41	Re: Stage 2+ 2.8 12V throttle body... WOW! looks like it will do nothing, Is this a TDL part

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