5.7 why 16 spark plugs

[Charles Cook]

Just put new plugs and coil packs on my Ram truck and was wondering, what’s the reason for 2 plugs per cylinder. Seem like a unnecessary expense.
And we don’t even want to talk about the one on driver side behind the brake booster.

 

[toolmanmike]

The second one is a "waste spark" It's an emissions thing.

 

[Bee1971]

 

[Charles Cook]

Oh,
They got the waste part right. Lol

 

[davek]

Just put new plugs and coil packs on my Ram truck and was wondering, what’s the reason for 2 plugs per cylinder. Seem like a unnecessary expense.
And we don’t even want to talk about the one on driver side behind the brake booster.

Plymouth knew people with RR had money to waste so they added the 2nd plug on the truck.

 

[Bee1971]

Why Not

16 is better then 8

11 is definitely better then 10

 

[Bee1971]

The extra plug fires during the power stroke to more fully burn the hydrocarbons. The second ignition allows additional power in the down stroke while lowering the need for restrictive catalyst plates in the converter.

 

[DeltaV]

what’s the reason for 2 plugs per cylinder.

Because it was way too difficult to fit in 3 per cylinder.

 

[DeltaV]

And we don’t even want to talk about the one on driver side behind the brake booster.

Sounds like you would be interested in an inline six for fewer plugs and relief from access around the brake booster. Here you go.

 

[Rebelrouser]

The extra plug fires during the power stroke to more fully burn the hydrocarbons. The second ignition allows additional power in the down stroke while lowering the need for restrictive catalyst plates in the converter.

Yep that is correct, no quench areas to speak of in the chamber, dual plugs were needed to pass emissions. If no dual plugs Hydrocarbon emissions would be much higher compared to a wedge type chamber.

 

[Charles Cook]

Sounds like you would be interested in an inline six for fewer plugs and relief from access around the brake booster. Here you go.

View attachment 1817756View attachment 1817757

Would that be the new hurricane engine?
It’s powerful for a 6 cylinder from what I hear.

 

[davek]

@Bob

Just put new plugs and coil packs on my Ram truck and was wondering, what’s the reason for 2 plugs per cylinder. Seem like a unnecessary expense.
And we don’t even want to talk about the one on driver side behind the brake booster.

@RJRENTON would know

 

[Charles Cook]

@Bob

@RJRENTON would know

If I can only afford 8 plugs, do I change one in each cylinder?

 

[DeltaV]

If I can only afford 8 plugs, do I change one in each cylinder?

No, just do the righthand bank of cylinders and you don't have to deal with the brake booster.

 

[DeltaV]

If I can only afford 8 plugs, do I change one in each cylinder?

You need a 2025 Ram with the new upgraded Cummins.

Cummins Launches Next Generation 6.7L Turbo Diesel Pickup Engine System for 2025 Ram Heavy Duty Trucks

 

[Charles Cook]

You need a 2025 Ram with the new upgraded Cummins.

View attachment 1817822

Cummins Launches Next Generation 6.7L Turbo Diesel Pickup Engine System for 2025 Ram Heavy Duty Trucks

They want an arm and two legs for one of them trucks. And a left Gonad.

 

[DeltaV]

They want an arm and two legs for one of them trucks. And a left Gonad.

Ok, so you're placing your order tomorrow?

 

[RJRENTON]

@Bob

@RJRENTON would know

IMO......best guess is emissions "assuring" complete combustion and reliable, repeatable operation, similar to certain Lycoming and Continental air craft engines and the old Pratt and Whitney Wasp DC3s and later engines......Now, with the precious metal electrode alloys and configurations, spark plugs are designed for 100k service miles b4 replacement........
BOB RENTON

 

[kiwigtx]

Plymouth knew people with RR had money to waste so they added the 2nd plug on the truck.

That was low Dave.

 

[Bee1971]

IMO......best guess is emissions "assuring" complete combustion and reliable, repeatable operation, similar to certain Lycoming and Continental air craft engines and the old Pratt and Whitney Wasp DC3s and later engines......Now, with the precious metal electrode alloys and configurations, spark plugs are designed for 100k service miles b4 replacement........
BOB RENTON

EXCEPT of course

The two vehicles I have owned since new and required maintenance

2011 Ram 1500 Hemi - Every 32,000 miles - Don’t put any miles on the damn thing anyways so

2017 Jeep Renegade 1.4 Turbo - Every 32,000 miles - At 110,000 Miles now , fourth set and damn damn expensive spark plugs