SP542 Thread

[Guy]

I think it’s time the SP542 gets a titled thread. There are posts about these little gems all over the forum in various threads from SPD to Whipple.

So post your setup, your experiences changing to the SP542 and your plug gap. Post why you changed and if it made the improvements you hoped.

For my own experience....

I had no issues with the factory plugs at 15k miles. MPT93 PRX, CAI, whipple intercooler, SPD adapters, FOMOCO catback.

I didn’t expect much. My hats off to you all for inspiring me. There is sharper throttle response. The low end, nonboosted power is smoother, and the idle is even smoother than it was before. It made the truck a little easier to drive and it’ll be easier to off-road with the improved low-end throttle control.

So the million dollar question....

Why?

GRANTED I left the gap on the plugs at .030.
I didn’t think .025 was necessary.

 

[Ckhris]

I think the stock plug gap is .28 isnt it? Why .30?

 

[Guy]

Sp542 come gapped at .030

I left them as they came In the box to see.

I think the stock plug gap is .28 isnt it? Why .30?

 

[Sharkus29]

Sp542 come gapped at .030

I left them as they came In the box to see.

Mine came gapped at .025

 

[Guy]

Interesting.

.030 here Triple checked each plug. Ordered from amazon

Mine came gapped at .025

 

[VSTOLG4]

Installed them today on '18 @.25. It reminded of when you first change your oil...it seemed to run smoother and quieter. My son asked why the truck was so quiet today while sitting at a light.

 

[Sharkus29]

Interesting.

.030 here Triple checked each plug. Ordered from amazon

Hmm that is weird, I got mine straight from my Ford dealership

 

[Guy]

So after 150 miles of driving I can say...

It’s the second best “upgrade” I’ve done to my truck after a tune. The visceral driving experience is significantly enhanced. There is a tighter connection between you, the truck, and the highway.

It’s as dialed in as any truck I’ve ever driven.
To all who have been squawking about this change.... I nod my head in gratitude.

 

[kpg81]

Makes me wonder why Ford didn't put these in from the factory, but glad it's a cheap and quick fix !! Made my truck run way better too.

 

[xrocket21]

So after 150 miles of driving I can say...

It’s the second best “upgrade” I’ve done to my truck after a tune. The visceral driving experience is significantly enhanced. There is a tighter connection between you, the truck, and the highway.

It’s as dialed in as any truck I’ve ever driven.
To all who have been squawking about this change.... I nod my head in gratitude.

you have GOT to be ******* ******** me