FP Plugs vs Denso

[K4fxd]

NA would you use the e3.112 or the e3.74?

Sponsored

 

[illtal]

you should look at a cross reference document , but you would probably not need the 112 because it's for boosted applications'

the 112 CROSS-REFERENCE: Brisk RR12S, RR14S

 

[K4fxd]

you should look at a cross reference document , but you would probably not need the 112 because it's for boosted applications'

The 74's are stock 17 replacement plugs. The 112 are a heat range colder.

 

[illtal]

The 74's are stock 17 replacement plugs. The 112 are a heat range colder.

that's what i said. i literally bought the 112s because im boosted

 

[Siege]

It looks like there is no NGK 6511, that part number links to a BP5ES plug that is totally different. I wasn't able to find a heat range 8 NGK plug with a tapered seat.

Does anyone know what the heat range is for the stock GT500 SP-581 Motorcraft plugs?

The Denso ITV24 plugs are an option but saw a few posts about idle issues with it being a non-projected plug.

 

[brianbr]

I run the 2018 Ford cobrajet plugs, also what Edelbrock supplies with their new 2650 kits. They are an iridium plug similar in design to the NGK 6510 but a step colder. They're also $65 a set from LMR. I have run 12 psi on them with boostane/Octanium and meth injection with no issues. They are a good option for low to moderate boost.

 

[Zrussian13]

I run the 2018 Ford cobrajet plugs, also what Edelbrock supplies with their new 2650 kits. They are an iridium plug similar in design to the NGK 6510 but a step colder. They're also $65 a set from LMR. I have run 12 psi on them with boostane/Octanium and meth injection with no issues. They are a good option for low to moderate boost.

How many miles are you getting out of those plugs? And how much/ often do you run octane booster?

 

[GregO]

I’ve seen more than a few DENSO’s fracture the ceramic around the electrode causing the ceramic to drop down to the ground strap and shield the arc from igniting the fuel.
NGK’s for the WIN.

 

[Siege]

I run the 2018 Ford cobrajet plugs, also what Edelbrock supplies with their new 2650 kits. They are an iridium plug similar in design to the NGK 6510 but a step colder. They're also $65 a set from LMR. I have run 12 psi on them with boostane/Octanium and meth injection with no issues. They are a good option for low to moderate boost.

I have searched and was unable to find any heat range for those CobraJet plugs. Have you seen anything?

 

[brianbr]

How many miles are you getting out of those plugs? And how much/ often do you run octane booster?

I was running it every fill up, 32oz of vp per tank. I don't really pay attention to the miles on the plugs, if I had to guess, maybe 8k. I just bought a new set to throw In. My car isn't a daily either though.

 

[brianbr]

I have searched and was unable to find any heat range for those CobraJet plugs. Have you seen anything?

 

[BrianH87]

That doesn't really make any sense though. Somewhere on the Gen3 they started using one heat range colder plugs from the factory. So that plug cannot be colder than all 15-21's.

 

[Siege]

That doesn't really make any sense though. Somewhere on the Gen3 they started using one heat range colder plugs from the factory. So that plug cannot be colder than all 15-21's.

Yeah exactly. In 2020 Ford switched to a heat range 7 plug and before that they used a heat range 6 plug.

If they were released with the 2018 CobraJet then they're probably 7s or what the engines are coming with now from the factory. But who knows because they didn't publish the heat range for these.

Whipple is recommending a heat range 8 plug now for supercharged applications.

 

[brianbr]

That doesn't really make any sense though. Somewhere on the Gen3 they started using one heat range colder plugs from the factory. So that plug cannot be colder than all 15-21's.

Did Ford really change the plug temp or is it misinformation that has been regurgitated so may times people believe it to be fact? Does anyone have proof.

A colder plug would not benefit a stock engine car. You would have higher emissions, harder cold starts, and an increased chance for fouling plugs. I ran my 2019 with stock plugs in the dead of summer on 91 here in AZ with no issues. I have a hard time believing Ford would start running a colder plug after the gen 3 was already in production for several years.

 

[BrianH87]

Did Ford really change the plug temp or is it misinformation that has been regurgitated so may times people believe it to be fact? Does anyone have proof.

A colder plug would not benefit a stock engine car. You would have higher emissions, harder cold starts, and an increased chance for fouling plugs. I ran my 2019 with stock plugs in the dead of summer on 91 here in AZ with no issues. I have a hard time believing Ford would start running a colder plug after the gen 3 was already in production for several years.

No it's for real. A colder plug definitely can benefit a car if the original was not the best choice in the first place. They only made the change after 2 years. Power and compression were both bumped up for Gen 3. They must have learned something. Changes happen all the time.

Sponsored