For Pricing and Part information...
For Pricing and Part information click the picture above.
It's obvious some runner length--just 3 inches--was incorporated into thedesign. While this length is definitely short, it's enough to broadenthe intake's working range so it has some midrange, while at the sametime providing Niagra Falls flow at the top end.
Trick Flow also has a range of lower intakes on which to perch its newupper. Their popular Street and Track Heat 302 manifolds use the samelower intake with 2.00x1.20-inch runner dimen- sions at the outletflange, while the racy R-Series and 351 Windsor lowers boast notablylarger 2.380x1.380-inch runners. Trick Flow is offering the new box, orBox-R Intake Manifold as it is officially known, only for the bigR-Series/ Windsor lower. That's proper, as the street-based 302 stuff issimply too small to support the box upper. This also means the newintake will fit both 302-based and 351 Windsor-based engines.
(above & right) On the discharge...
(above & right) On the discharge end of the runners, the staggered rectangle spacing isapparent, along with the recessed mounting hardware between the lowercasting and the billet flange adapter. The upper intake mates witheither the R-Series 302 or 351 Trick Flow lower intakes.
You'll also note the new Trick Flow box upper resembles Ford's '96-'98Cobra intake manifold. Trick Flow is quick to point out that they had nointention of copying the Ford intake, but rather that's where the flowbench led them. This makes perfect sense, as both intakes share the sameperformance criterion--high-rpm flow--and you know Ford spent plenty ofresources developing the Cobra intake so it would work. There's noreason to think Trick Flow's flow bench would take the company in anyother direction. Or, as Charlie Schmidt of Trick Flow told us, any othershape had dead areas in the plenum's corners.
Trick Flow gave the new intake...
Trick Flow gave the new intake a beau-tiful shape and classy badging,and the button-headed hardware is easy on the eyes as well. The uppercastings are available in raw aluminum as shown here, or powdercoatedsilver or black.
Other hallmarks of good airflow management are seen in the new intake'sperfectly straight and equally spaced runners. The somewhat raised androunded entries into the runners in the bottom of the new upper are alsocharacteristic of high-flow air practice. The throttle body inlet iscentered on the runners and sized for a 90mm unit. No EGR is provided tothe throttle body flange, and obviously no CARB E.O. number is availableas the intake is a race-only design.
The throttle body has also ended up rearward of its stock location,fouling the stock fuel rail/regulator arrangement. Aftermarket fuelrails are the answer to this. At our deadline, Trick Flow was working ona fuel rail to suit, but any number of aftermarket fuel rails andadjustable fuel regulators should work.
Careful shaping of the plenum...
Careful shaping of the plenum cover directs air into the runners andprovides the intake with what is sure to become the modern "rounded box"standard in high-flow intake shapes. We doubt hand-grinding will do anygood, but the easy-to-manufacture, two-piece plenum design does alloweasy die-grinder access.
There should be enough slack in the stock throttle cable to work,however, and the 90mm inlet means grinding that opening should hardly benecessary. With no EGR available at the throttle body, Trick Flow offersa blank EGR spacer to properly space the throttle body.
Charlie at Trick Flow figures on a "1,200-1,300hp" potential from thisintake on a turbo'd Windsor race engine. That ought to be enough foranyone running a store-bought, cast-aluminum intake.
As for a lower horsepower level for the new Box-R intake, Trick Flowsays its standard R-Series intake starts losing to the new box upper at450 hp, while big-inch Windsors in the 408-cube league are ready for thebox upper at 550 hp.