Articles tagged #BOOST
Articles tagged
#BOOST
Testing Boost Theory on a Pair of LS Engines
One of the greatest inventions since the introduction of the internal combustion engine has to be boost. Nothing adds power to a combination like the introduction of some positive pressure, especially when it comes from an efficient twin-screw supercharger like the one we tested from Kenne Bell. Adding modest boost to your engine will transform even the wimpiest LS powerplant. Heck, even boosting a stock engine will offer serious gains, but the real power comes from the combination of boost and performance mods. The very best supercharged engines have something in common, they all started out as powerful naturally aspirated combinations. The more power your engine makes in naturally aspirated trim, the more power it will make under boost. What better way to illustrate our naturally aspirated/boost theory than with the application of boost to a pair of different LS powerplants?
Four Dyno-Proven Ways to Add More Power to Your Mild Big-Block Chevy
A recent trip to the local Pick Your Part wrecking yard revealed row after row of what we like to call possibilities. Under the hood of each and every vehicle in the yard were the makings of a high-performance race engine just begging for a new lease on life. Of course, some would take considerable work to get there while others may never make it. But choose wisely and the rewards can be impressive. When you go looking for power in the yard, it is always best to go big, as in big-block Chevy. In the sea of stock, junkyard engines, bigger certainly means better. Since we planned on running a trio of power-adders on our junkyard “race” engine, we went right for a engine we knew was capable of withstanding both boost and juice. Though earlier Mark IV and Gen V engines are usually available, we zeroed in on the latest and greatest: a Gen VI 454 (7.4L) offered by GM from 1996-’99 (actually into early 2000).
A Cool G Part Deux - Our 383 LS Gets Boost And Makes Over 1000 Horsepower For The Street
Back in part 1 we introduced Bangshifters to our Cool G 383 build up. What started out as a simple, iron-block 5.3L was quickly transformed into a 383 stroker by combining a forged steel crank (4.0-inch stroke) and 6.125-inch rods from Speedmaster with a set of JE forged, flat-top pistons. To that short block we added a Crane hydraulic roller cam that offered .624 lift, a 232/240-degree duration split and 113-degree lsa. We then topped off the stout short block with a set of CNC-ported TFS Gen X 225 heads and a Holley Mid Ram induction system. The unique intake system could be run a number of different ways but we chose the single throttle-body/EFI route. Back in part 1 we assembled the motor using ARP head studs and Fel Pro MLS head gaskets then ran the normally aspirated combo using a Holley Dominator EFI system. Taking the ever-foolish, more-is-better approach, we decided on a lofty goal of no less than 1,000 hp (a Cool G). In normally aspirated trim, the 383 produced 517 hp and 483 lb-ft of torque on the SuperFlow 902 at Westech Performance Group, getting us more than half way there.