Full e85- how long do your plugs last

[Msm1984]

Hey all


Curious as to how often you are swapping your 97506 plugs usually gapped to 0.20 while running full e?

Seems to be they start misfiring at around 7k miles at the most even if you run e85 once in a blue moon?

Would love to hear your thoughts

[Matt@autotalent]

Originally Posted by Msm1984

Hey all


Curious as to how often you are swapping your 97506 plugs usually gapped to 0.20 while running full e?

Seems to be they start misfiring at around 7k miles at the most even if you run e85 once in a blue moon?

Would love to hear your thoughts

Usually once a year or every 10,000 miles I would say.

It depends on how often youre doing the fuel maintenance like injector cleaner and cycling to 91

[M2C_OZ]

Originally Posted by Msm1984

Hey all


Curious as to how often you are swapping your 97506 plugs usually gapped to 0.20 while running full e?

Seems to be they start misfiring at around 7k miles at the most even if you run e85 once in a blue moon?

Would love to hear your thoughts

97506 gapped at .018 i've had them since 7k, im now at 18k and they're still fine (been on E85 since then)

[Msm1984]

Originally Posted by M2C_OZ

97506 gapped at .018 i've had them since 7k, im now at 18k and they're still fine (been on E85 since then)

Wow and no misfires??? That's crazy they lasted so long i misfire at around 6k.. how strong of a tune are you running and do you cycle back to 93 often?

[M2C_OZ]

Originally Posted by Msm1984

Wow and no misfires??? That's crazy they lasted so long i misfire at around 6k.. how strong of a tune are you running and do you cycle back to 93 often?

Haven't cycled back to 93 at all, running 25psi tapering to 22. Nope no misfires at all, i live in new england (car seems to like cold starts) havent had any issues

[Msm1984]

Originally Posted by M2C_OZ

Haven't cycled back to 93 at all, running 25psi tapering to 22. Nope no misfires at all, i live in new england (car seems to like cold starts) havent had any issues

Ok that is a pretty conservative tune then maybe like 550whp or so

[M2C_OZ]

Originally Posted by Msm1984

Ok that is a pretty conservative tune then maybe like 550whp or so

580 😁

[MisterF80M3]

Originally Posted by M2C_OZ

97506 gapped at .018 i've had them since 7k, im now at 18k and they're still fine (been on E85 since then)

Why did you gap them to .018 vs .020 or .022?

[M2C_OZ]

Originally Posted by MisterF80M3

Why did you gap them to .018 vs .020 or .022?

Honestly they seem to work better at that gap, had 2 n54's in the past ( 1 ST and the other fbo) always ran at that gap never had an issue so i basically stuck with it