Need spark plug gap specs for supercharged application

[Ram From Hell]

I have the colder range NGK ZFR6F11 plugs, and need the gap spec for them.

Anyone recall what it is?

Thanks!

 

[Silverback]

I would since they are a colder range plug that the gap would not be changed because of the SC application.

At least in my previous vehicles that were boosted I just ran colder plugs with the recommended gap.

Hope that helps Eric.

 

[RedSrt007]

Ive ran the 5's and 6's and run them @ .028..30's would blow them out.

-Red

 

[Ram From Hell]

Ive ran the 5's and 6's and run them @ .028..30's would blow them out.

-Red

Thanks guys. That was my first inclination, but wanted to double check.

-E

 

[Bone]

I believe .035. I think NGKs are gapped factory to .045 but I would have to check. You can call me tomorrow at the shop and I will find out.
478-396-5571.

Roe sells Bosch's gapped at .032 for their SC. Once again, I would have to verify the plugs at the shop.

Q: Do I need to set the "gap" when installing a new set of plugs?
A: Maybe. A spark plug part number might fit hundreds of engines and, although the factory will typically set the gap to a pre-selected setting, this may not be the right gap for your particular engine. Insufficient spark plug gap can cause pre-ignition, detonation and even engine damage. Too much gap can result in a higher rate of misfires, loss of power, plug fouling and poor fuel economy. It is always best to check the gap against the manufacturer's specifications.
Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004" for every 50 hp you add). However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005".
If you have any questions, please contact the NGK Sparkplugs Tech Staff here. The manufacturer of your vehicle, the company that produced the aftermarket products you've used and/or your mechanic are all additional sources of gapping information if you've modified your vehicle.

 

[Ram From Hell]

FYI, Dan Cragin's .02 worth was for 30 to 32.

 

[Bone]

FYI, Dan Cragin's .02 worth was for 30 to 32.

Stock gap is .045 on the NGKs, so I used the formula and came up with .030 to .033. That is what I set mine today to....

I have a set of Roe's Boschs for SC and they are already gapped to .032. I won't be needing these (probably will put them up for sale with a bunch of other stuff).