Need a constant 12v when cranking
Race Director
Joined: Mar 2017
Posts: 11,947
Likes: 4,506
From: Virginia
Holley's instructions certainly don't call for anyone to create a second battery solution. If the car drops below 7V while cranking, the issue is the battery, battery cables, or starter. Hook up the system to the battery, with an ignition switched relay, and you'll get the power the Holley Sniper needs. Just like the instructions tell you to do.
As much fun as it's been to imagine a solution, the problem doesn't actually exist.
EDIT: Just for fun, take out all 8 spark plugs, then crank the engine and measure the voltage while cranking. If it stays high, perhaps your problem is timing.
As much fun as it's been to imagine a solution, the problem doesn't actually exist.
EDIT: Just for fun, take out all 8 spark plugs, then crank the engine and measure the voltage while cranking. If it stays high, perhaps your problem is timing.
Team Owner
Joined: Jun 2001
Posts: 23,375
Likes: 1,066
From: Virginia USA
I used the ING from the fuse box to power a relay then ran 12V straight from the battery, through the relay to power my Sniper 2 12v source. Most relay contacts will stay closed even if the voltage drops to 10 - 11 volts. Works like a charm but I did have it connected directly when I first installed my Sniper and never had an issue either. I just wanted a reliable 12v from the battery.
Le Mans Master
Joined: Jan 2001
Posts: 6,741
Likes: 1,383
I concur.
It's a non-problem looking for a solution.
It's a non-problem looking for a solution.
Holley's instructions certainly don't call for anyone to create a second battery solution. If the car drops below 7V while cranking, the issue is the battery, battery cables, or starter. Hook up the system to the battery, with an ignition switched relay, and you'll get the power the Holley Sniper needs. Just like the instructions tell you to do.
As much fun as it's been to imagine a solution, the problem doesn't actually exist.
EDIT: Just for fun, take out all 8 spark plugs, then crank the engine and measure the voltage while cranking. If it stays high, perhaps your problem is timing.
As much fun as it's been to imagine a solution, the problem doesn't actually exist.
EDIT: Just for fun, take out all 8 spark plugs, then crank the engine and measure the voltage while cranking. If it stays high, perhaps your problem is timing.
