5.0 Mustang & Super FordsHow To Engine
High-RPM EFI Intakes Test: Spin the Throttle
With an 8,000-rpm Small-Block on Tap, We Test Six High-RPM EFI Intakes
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If you tuned in last month, you saw us follow along as Rick Anderson of Anderson Ford Motorsport coupled a lightweight D.S.S. 347 with one of his AFM Hydraulic Roller High Rev series camshafts to create an 8,000-rpm-capable, 458hp, fuel-injected small-block (:Natural High," Oct. '02 p. 55). If you didn't tune in last monthwell, shame on you (our subscrip- tions are cheap, you know). In last month's issue, we detailed many of the lightweight internals Rick optioned for his D.S.S. Sportsman Renegade short-block, as well as the specs of the AFM N113 camshaft and the cylinder-head porting. Then we dyno'd the combination with an Edelbrock Victor 5.0 intake manifold with the aforementioned impressive results.
In any case, it was a trick engine (for more on the complete combo, check out the 5.0 Tech Specs sidebar). With such rpm capability, we thought there might be a little power lurking in the intake manifold, so we resolved to try as many of the high-rpm EFI intakes as we could in a back-to-back dyno test. We gathered up some of the most aggressive EFI intake manifolds on the planet: Edelbrock's Victor 5.0, Probe Industries' EFI Spyder, Reichard Racing's Billet Upper, Trick Flow's R-series, Trick Flow's prototype box upper, and Vortech's Mondo Box. With five intakes in his trunk and one under the hood, Rick headed back to one of his favorite places, the Dynojet building onsite at AFM. During the course of three days, Rick swapped the intake manifolds and dyno'd each with the same settings in his trusty Programmable Management System, taking great care to make each pull at the same engine temperature for consistency. As deadlines approach, Rick usually regrets agreeing to test a pile of hardware for us, but when it's over he's usually glad he did it because he learned something (and if he learned something, we can all learn something). And this test was no different. Rick had questioned whether the new generation of simple box intakes could perform as well as today's modern short-runner designs, and as it turns out, they can.
If you're new on the scene, you might be wondering what kind of tubing is attached to the throttle body in all our photos. Well, that's one of AFM's Naturally Aspirated Power Pipes. That's right--they're not just for blowers anymore. These large-diameter tubes are designed to place the mass air meter in the inner fender and provide an unfettered path for inlet air, which usually results in several more horsepower to the rear wheels of your Mustang.