[Longdoggy]

Doing my first spark plug maintenance job.
Have NGK 96206 plugs, running 2020 M340.

Tune is Carbahn piggyback - https://carbahn.com/product/cbprc-00...e-b58d-6-port/

What gap is recommended on this/piggyback tunes?

[Rdurty2]

Stock gap. Even if you had an OTS tune you use stock gap.

[RTPenland]

Originally Posted by Longdoggy

Doing my first spark plug maintenance job.
Have NGK 96206 plugs, running 2020 M340.

Tune is Carbahn piggyback - https://carbahn.com/product/cbprc-00...e-b58d-6-port/

What gap is recommended on this/piggyback tunes?

While not Carbauhn, Burger that produces the JB4 piggyback recommends 0.022" for their tuned applications. Mission, BM3, and others also recommend plugs that are gapped to something other than the stock 0.030 (but those are flashes and not piggybacks) depending on application. A little digging should net you the results that you are after (bottom line if you are listening to most all the major tuners you'll ideally want something other than stock)

[Longdoggy]

Thanks guys. That’s why I am asking here. Seems quite a few different recommendations, somewhere between .02 and .03.

[BobTheBimmer]

Originally Posted by Longdoggy

Thanks guys. That’s why I am asking here. Seems quite a few different recommendations, somewhere between .02 and .03.

Have the Mission Performance tune. Gapped to 0.024.

[xnick101]

Stock gap.

[dustwhyn]

Always use NGK 96206, always use stock gap. Doesn’t matter how much power you’re pushing or what tune you’re on. Keep it at the stock gap. If your tuner tries to tell you otherwise, find a different tuner.

[Seba77W]

Originally Posted by dustwhyn

Always use NGK 96206, always use stock gap. Doesn’t matter how much power you’re pushing or what tune you’re on. Keep it at the stock gap. If your tuner tries to tell you otherwise, find a different tuner.

Is this just on this platform ? Man on my F32 n55 with stage 2+ tune from MHD if I wasn’t running 97506’s with a .022 gap I’d be getting all sorts of misfires and it just didn’t run well. I tried anything from stock gap to .024 and finally .022 seemed to be the sweetspot.

[dustwhyn]

Originally Posted by Seba77W

Is this just on this platform ? Man on my F32 n55 with stage 2+ tune from MHD if I wasn’t running 97506’s with a .022 gap I’d be getting all sorts of misfires and it just didn’t run well. I tried anything from stock gap to .024 and finally .022 seemed to be the sweetspot.

B58 and S58

[GA/\/\/\/\A_CT]

Originally Posted by dustwhyn

Always use NGK 96206, always use stock gap. Doesn’t matter how much power you’re pushing or what tune you’re on. Keep it at the stock gap. If your tuner tries to tell you otherwise, find a different tuner.

For my education can you please explain why narrower gap is not a good idea for a tune? Is your concern with the actual tune being too aggressive , or with the spark plug function?

[co_pa]

Stock gap on JB4 and no issues whatsoever.
My understanding from PFT is to gap flash tunes based on all the add'l parameters tuned.

Are you running the Carbahn controller now? How does it feel, or perform if you have data, v stock?

[jpowers36]

Running stock gap on stage 2 MG Flasher 93 octane OTS tune. Runs great.

[dustwhyn]

Originally Posted by GA/\/\/\/\A_CT

For my education can you please explain why narrower gap is not a good idea for a tune? Is your concern with the actual tune being too aggressive , or with the spark plug function?

It has to do with the way that iridium plugs are designed and the way that they function. They’re significantly more efficient than old school plugs and there is no need to change the gap because of this.