New from Holley – the EFI V5 Software Upgrade. This update enables new features like Active Speed Management and Staging Assist. See more details below.

Official Release:

Holley/MSD is pleased to announce the release of the latest software upgrade from Holley EFI – Holley EFI V5 – which features Active Speed Management and also allows racers to completely customize up to three sets of injectors. At the drag strip, the all-new Staging Assist feature makes it easy to smoothly and consistently inch your boosted car into the staging beams run after run. V5 features an integrated traction-control system called Holley EFI Active Speed Management that’s engineered with drag racing and motorsports that start from a stop in mind.

V5’s ASM functionality is based on the time from launch versus engine speed and driveshaft speed (one or both can be used). You can enter numerous different curves to retard ignition timing and even enable rev-limiting based on the departure of wheel speed or engine speed from the base curve. The addition of ASM to a Holley EFI system requires the purchase of PN 555-100. Each purchase allows activation of the Active Speed Management in a single ECU.

Features:

• Active Speed Management
• Allows racers to completely customize up to three sets of injectors
• Staging Assist feature