The guys at BBK understand what goes into the design of an intake manifold. Their Single Stage Induction (SSI) intake promised effective power gains, so we decided to put one to the test on Modern Mouse. You will remember that Modern Mouse had long since been converted from a stock LM7 to a 383 stroker courtesy of Procomp Electronics, Probe Racing, and L&R Autotmotive. The 5.3L stroker short-block featured a Comp LSR cathedral-port cam, and was topped with a set of Gen X 215 heads from Trick Flow Specialties. For our testing, Modern Mouse was also treated to an 80mm Accufab throttle body, a set of American Racing Headers, and Holley 75-psi injectors. The engine was also sporting a Meziere electric water pump, FAST XFI/XIM management system, and a fresh oil change with Lucas 5W-30 synthetic oil (and K&N oil filter). The 75lb injectors were overkill for this application, but we had them on hand for another round of forced induction. Look for boosted results in the next installment of Modern Mouse. To establish our baseline, the motor was first run with the stock 5.3L truck intake and Accufab 80mm throttle body. Once the air/fuel and timing curves were optimized with the FAST computer, the modified LM7 produced 515 hp at 5,800 rpm and 506 lb-ft of torque at 4,700 rpm. Obviously tuned for truck applications, torque production exceeded 475 lb-ft from 3,600 rpm to 5,600 rpm. Installation of the BBK SSI intake also required replacing the factory truck fuel rail with a billet unit from Wilson Manifolds. After swapping over the Accufab throttle body, the peak power numbers jumped to 524 hp at 6,100 rpm and 503 lb-ft of torque at 4,800 rpm. The BBK intake improved the power output of the 383 by as much as 15-16 hp at the top of the rev range, but it is hard to beat the torquey truck manifold in the lower rev ranges. Note that both the peak horsepower and torque values with the BBK intake occurred at higher engine speeds than the truck manifold. We suspect the BBK intake would show even better results on a larger stroker or one with even wilder cam timing. 14 The same Holley 75lb injectors were employed on the BBK intake but run with Wilson billet fuel rails. 14 The same Holley 75lb injectors were employed on the BBK intake but run with Wilson bil 15 Equipped with the same Accufab throttle body, the BBK SSI intake produced 524 hp at 6,100 rpm and 503 lb-ft of torque at 4,800 rpm. The SSI intake improved power output by 15-16 hp at the top of the rev range but lost out to the truck intake below 5,500 rpm. 15 Equipped with the same Accufab throttle body, the BBK SSI intake produced 524 hp at 6, 16 The BBK SSI intake offered 15-16 additional horsepower at the top of the rev range, but lost out below 5,500 rpm. We liked the idea of being able to port the BBK intake for improved flow. We suspect radiused port entries and port matching might really wake up the aluminum intake. We also feel the SSI intake might respond to a slightly wilder cam or larger stroker application. 16 The BBK SSI intake offered 15-16 additional horsepower at the top of the rev range, bu SOURCES Trick Flow Specialties 1248 Southeast Avenue Tallmadge OH 44278 330-630-1555 www.trickflow.com Probe Racing 2555 West 237th Street Torrance CA 90505 310-784-2977 www.probeindustries.com Comp Cams/Fast 3406 Democrat Road Memphis TN 38118 800-999-0853 www.compcams.com Procomp Electronics 605 S. Milliken Avenue Unit A Ontario CA 91761 909-605-1123 www.procompelectronics.com Holley/Hooker 1801 Russellville Road Bowling Green KY 42101 270-782-2900 www.holley.com BBK Performance 27440 Bostik Court Temecula CA 92590 951-296-1771 www.bbkperformance.com L&R Automotive 13731 Bora Drive Sante Fe Springs CA 90670 562-802-0443 www.lnrengine.com « | 1 | 2 | 3 | View Full Article By Richard Holdener Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!