Oct 24, 2025 · To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in …

May 29, 2025 · Dominator EFI Tuning & TechIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to …

Forum DescriptionIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing …

Jun 12, 2024 · I just noticed that the V2 EFI software supports both Sniper 1 & 2, but I saw the note in the overview that say call Holley because V1.3 needs a special update. Is the update worth doing …

Jan 9, 2023 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an …

Jun 21, 2021 · I have the Holley 550-936 Terminator X Kit, and added CNP harness 558-307. Running Dual Sync on a Mark IV BBC.

Jul 25, 2023 · This thread is a pictorial summary of my use of SPAL Brushless cooling fans with Holley EFI, and linked from andrewb70 topic on same concept using larger, single GM OEM SPAL …

Aug 24, 2024 · Hi. I have a Sniper 2 model 550-510 with a Sniper Transmission Controller. It appears to have had an older firmware version 102 since these were the file folders on the SD card. I followed …

Oct 31, 2015 · Holley EFI Software HotKeys for Quick Keyboard Navigaton 10-31-2015, 11:50 AM Several people have asked me if there were any Hot Keys in the EFI software, to make

Jul 27, 2013 · I'm using a Dominator EFI system with a factory electric TH400 speed sender using 40 PPR and a 2-wire pickup. I currently have it setup as a Digital Speed Input and it logs correctly and …