Our previous billet LS engine design was shown to run well for Marcus Carew at 4,000 horsepower. Thanks to the extreme processing speed of his Emtron ECU, we were able to see some flexing of the crankshaft at that power level. While not problematic at 4,000 hp, our new target was going to be 4,500 hp so a redesign was required.
The solution started with a BRE-custom, Energy Manufacturing billet LS block. Main journal diameter was changed from the LS standard 2.559 inches up to the Ford Cleveland-style main diameter of 2.750 inches. This seemingly small incremental change yields a calculated 15% increase in crankshaft stiffness. All else being equal, which it never is, that opened the door to the targeted 12.5% increase in horsepower. Several other major changes were made to the rotating assembly, but those will be reviewed separately.
@ Energymfg @EmtronWorld @CalliesPerformance #boost #boosted #turbo #turbocharged #turbocharger #LSswap
Borowski Race Engines, Inc.
1545 Mound Rd
Joliet IL 60436
Tel: 815-725-2727
www.borowskirace.com
