The gap setting is different for each vehicle but most are somewhere between 0.028″ and .060″. Consult the owner’s manual or Champion ® catalog to find the recommended setting for the vehicle you’re working on.
What is the spark plug gap on a 5.7 Vortec?
PLUG GAP .045. but if using with HVS ignition . 060 is recommended.
What is the plug gap for GM Hei?
Because energy is required for a spark to jump an air gap, minimize your plug gaps. Start with a gap between .032 and .035 inch, which should be a good amount to make a spark and give the fuel/air mixture enough space to get in there and light up.
What size spark plugs does a Chevy 350 take? – Related Questions
What happens if plug gap is too big?
Many think the larger the gap, the better. However, if the gap is too large, and the ignition system can’t provide the voltage needed to spark across the gap, or turbulence in the combustion chamber blows out the spark, misfires will occur.
Do AC Delco spark plugs need to be gapped?
NOTE: ACDelco Professional Iridium Spark Plugs are pre-gapped during manufacturing. Never attempt to gap an ACDelco Professional Iridium Spark Plug. You could damage the spark plug.
How do you hook up a GM HEI distributor?
How do you set the timing on a GM HEI?
Are NGK G Power pre gapped?
“NGK spark plugs traditionally leave the factory pre-gapped for their most popular application. However, a plug may fit hundreds of engines, from cars to golf carts. Gapping the plugs to your engine’s specifications is important to prevent pre-ignition, detonation, fouling and poor fuel economy.
What year did GM use the HEI distributor?
High energy ignition, also known as H.E.I., is an electronic ignition system designed by the Delco-Remy Division of General Motors. It was used on all GM vehicles, at least in the North American market, from 1975 through the mid-1980s.
What does the HEI stand for?
HEI stands for “High Energy Ignition” or, Electronic Ignition. It can replace “points type” ignitions. This covers a broad range of automotive manufactures and companies that make this type of distributor system.
How many amps does a HEI distributor take?
Actually, an HEI draws only 2- to 3-amps, compared to the approximate 6-amps an external oil-filled coil draws. The lower amperage draw results in a much cooler running HEI coil. HEI Coils also run cooler because they are encapsulated in thermal epoxy, which dissipates heat more efficiently than oil-filled coils.
This is typically a 20-gauge yellow wire. The separate coil also requires low-tension and high-tension hookups to the distributor. In order to run properly, an HEI requires a full 12 volts at all times.
Does an HEI distributor need a resistor?
When using HEI, the distributor requires a 12 volt feed. In order to achieve this the ballast resistor or the resistance wire must be removed from the circuit and replaced with a pure 12 gauge feed wire.
Does HEI use vacuum advance?
In the case of the HEI, you can actually purchase an adjustable vacuum advance canister that will allow you to custom-tune the amount of timing advance. For example, Pertronix offers an adjustable vacuum advance canister that bolts in place of the stock canister.
Can you put a rev limiter on a HEI distributor?
The MSD Digital Soft-Touch HEI Rev Limiter is designed to plug into nearly any HEI distributor and produces an accurate, smooth rev limiting action. RPM limit is adjustable from 3000 – 9900 rpm via 2 rotary dials with an LED display. This Limiter has the ability to record the highest rpm reached during a race.
Does rev limiter cut spark or fuel?
Ignition control rev limiting systems work by shutting off the spark plugs once the engine overspeeds. This is less common in production vehicles because the system still injects fuel into the cylinder and consequently releases unburned fuel which may ignite at a turbo charger or in the exhaust pipe.
What happens to an engine when you hit the rev limiter?
A hard limiter cuts either the spark or more commonly the fuel, halting combustion and robbing the engine of all its power in an instant. That’s what creates such a fierce effect when you hit one. Power is restored as the engine speed drops by a small amount, then gets cut again as it reaches the limiter.