5.0 Mustang & Super Fords
Clevor Engine Intake Manifold Upgrade - Box Score
Upgrading our Clevor Engine Build with a Trick Flow Short-Runner Upper Intake
When you think about our Clevor's original induction setup, it's easy to understand how the long runners of the engine's Trick Flow R Series upper manifold actually decrease intake-air's (drawn through Anderson Ford Motorsports' 4-inch Power Pipe, Abbaco's 97mm DBX mass air sensor and a 90mm throttle body) velocity and efficiency, before passing into and through the large openings in the heads.
Replacing the standard R-Series upper-intake manifold with Trick Flow's famed Box R topper (PN TFS-51500008; $395.99) is a move that we're excited about. It should increase air volume in the manifold and shorten the distance that it actually has to travel. We strongly believed it would take the Clevor's naturally aspirated performance to a level that's more in line with the horsepower and torque values we all optimistically forecasted at the outset of the project.
Like many of you, Greg's a more-than-capable do-it-yourselfer and has handled all of the bolt-on assignments for Project Leave It to Clevor since the effort really hit full stride in our Sep. '11 issue ("Turning Tricks"). So with that said, check out the photos and captions highlighting the upper manifold exchange, and the compelling data that is a result of hitting both the dyno and the dragstrip immediately after the operation was completed.
On The strip
Shortly after the dyno test, we took advantage of a private test session at Auto Club Dragway that featured several project cars and motorcycles from Source Interlink Media's SoCal-based performance mags. Despite 85 degree temperature, density altitude that reportedly was close to 4,000 feet, and a clutch that was not doing well at all (see Horse Sense), Project Leave It to Clevor put down solid low-11-second runs across the 1,320.
While Greg's run notes are included in the caption for each timeslip, we must add that the GT carried a full fuel tank and tipped the scales at 3,500 pounds with Greg in the seat. Perhaps if we had removed the spare tire, jack, and full nitrous bottle (which we weren't using), approximately 50 pounds would have been gone and "official" 10-second e.t.'s could be claimed.
Run 1 (11.14/124.63 mph)
Run 2 (11.06/124.51 mph)
Run 3 (11.02 124.72 mph)