900HP 400 Engine Specs Bore x Stroke: 4.125 x 3.75 Compression: 11.0:1 Cam: Comp Cams Blower 300BR-14 Lift: 0.575/0.575 Duration: 255/262 Lobe Sep: 114 Heads: Dr. J's Profiler In/Ex Port Vol: 242cc/84cc In/Ex Flow: 335/242 CFM @ 0.700 Valve Sizes: 2.08/1.6 Chamber: 68cc Intake Manifold: Dr. J's ported Edelbrock Super Victor Carburetor: CSU-Modified Holley 1,000HP Headers: Hooker 1 3/4 Power Adder: Supercharger Supercharger: Vortech YSI Boost: 13.5 PSI Oiling System: Moroso All superchargers are not created equal. Actually it would be more accurate to state that all superchargers do not produce the same boost or power curves. The Roots blower used on our 800HP combination offered immediate boost response. This compares to the linear boost curve that increases with engine speed provided by a centrifugal supercharger. Basically the Roots blower offers better low-speed response, while the centrifugal offers superior top-end power. The Vortech was applied to our ProComp 400-inch short block. Since we were looking for 900 hp, the SBC was configured with a solid roller (blower grind) cam and a set of Profiler heads from Dr. J's. The Profiler heads featured full CNC porting that produced 242cc intake ports and peak flow numbers of 328 CFM on the intake and 242 CFM on the exhaust. For dyno use, we installed a pulley combination that produced a peak boost reading of 13.3 PSI at 6,600 RPM. In normally aspirated trim, the 400 produced a little over 600HP and 530 lb-ft of torque. Run with the Vortech YSI (producing a peak boost reading of 13.3 PSI), the supercharged small-block pumped out 1,005HP at 6,600 RPM and 820 lb-ft of torque at 5,900 RPM. 1,000HP 383 Engine Specs Bore x Stroke: 4.03x3.75 Compression: 9.5:1 Cam: Comp Cams Custom Roller Lift 0.682/0.688 Duration 248/254 Lobe Sep: 113 Heads: Trick Flow Specialties Super 23 Aluminum In/Ex Port Vol: 230cc/78cc In/Ex Flow: 325/235 CFM @ 0.700 Valve Sizes: 2.08/1.6 Chamber: 68cc Intake Manifold: Fast Single Plane EFI Carburetor: NA EFI: FAST XFI Injectors: 160 lbs/hr Headers: Custom Turbo Power Adder: Twin Turbos Turbos: Comp Turbo 74mm Intercooler: Air to Water (Ice Water) Boost: 10+ PSI Oiling System: Milodon The final power recipes was this 1,000HP example. Actually, this 383 produced more than 1,600HP with the boost cranked up, but run at just 10.7 PSI, this impressive small-block thumped out 1,073HP and 865 lb-ft of torque. The 383 featured a full Lunati forged rotating stroker assembly, Trick Flow Specialties Super 23 230 heads and a custom solid roller cam from Comp Cams. Comp Turbo supplied a pair of 74mm turbos (capable of supporting 950HP each). The trick turbos featured billet aluminum center sections set up to accept water cooling. The turbos fed a custom air-to-water intercooler run with ice water. Unlike all of our carbureted combinations, this one featured a FAST XFI management system. FAST also supplied the intake, fuel rails and 160-pound injectors. Note the relatively flat torque curve from 4,900-6,500 RPM. The turbos were sized to allow this small block to exceed 1,600HP and as such, were a tad on the large size for this lower power level. Smaller turbos would equal the power output while offering much better low-speed response, but they were needed once the boost was crank up. SOURCES Trick Flow Specialties 1248 Southeast Avenue Tallmadge OH 44278 330-630-1555 www.trickflow.com Carburetor Solutions Unlimited 17367 Reed Street Fontana CA 92336 909-851-6955 www.camresearch.com Comp Cams/Fast 3406 Democrat Road Memphis TN 38118 800-999-0853 www.compcams.com Bullet Cams 8785 Old Craft Road Olive Branch MS 38654 662-893-5670 www.bulletcams.com Demon Engines Sante Fe Springs CA 562-694-2559 www.demonengines.com Dr. J's Performance 436 S Montgomery Street Orange CA 92868 714-808-9780 www.j-performance.com Vortech Engineering 1650 Pacific Avenue Oxnard CA 93033 805-247-0226 www.vortechsuperchargers.com Procomp Electronics 605 S. Milliken Avenue Unit A Ontario CA 91761 909-605-1123 www.procompelectronics.com L&R Automotive 13731 Bora Drive Sante Fe Springs CA 90670 562-802-0443 www.lnrengine.com Turbo Smart 11650 Mission Park Drive Suite 103 Rancho Cucamonga CA 91730 909-476-2570 www.turbosmartonline.com Probe Racing 2555 West 237th Street Torrance CA 90505 310-784-2977 www.probeindustries.com Holley/Hooker/Weiand/NOS 1801 Russellville Road Bowling Green KY 42101 270-782-2900 www.holley.com Comp Turbo 221 West Allen Avenue San Dimas CA 91773 909-599-5757 www.compturbo.com « | 1 | 2 | 3 | 4 | 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!