Reading a lot of different answers so looking for help. Need to know what to Gap my plugs to.

2016 6.2 with ARH longtubes catted Y to stock catback and a whipple with a 3.75" pulley.
Plugs are TR7
Originally gapped to .035 per whipples instructions but that was for the 4" pulley not the 3.75" I installed. Throttle breaks up bad at the top of each gear around 5k rpm and I get a p0300 code. I'm thinking I'm getting blowout.

thanks

 

.025 - .028

 

Gapped to .028 and wow it's all better and a completely different truck!

 

Glad to hear. Next time you change plugs go to BR7EF. They are the same as BR7 but a non projected.

 

What's wrong with projected tip plugs?

 

More prone to detonation, the hot strap sits further into the combustion chamber and non projected can dissipate the heat to the cyl faster.

 

Gap these @ what? for 5.3 DI Magnuson TVS 1900 at 10 psi?

RT

 

I run mine at .022-.023 but that's for more boost. I would guess they should be good at .025-.026 in yours.

If your only at 10psi you may be fine with 6's
Throw a couple new plugs in it and read them to see how the heat range looks.

 

Throttle breaks up bad at the top of each gear


Hey can you please describe exactly what this means?

breaks up sounds like miss fire but you added the word throttle in front of that to mean something different?

 

Spark blow out