Ok, next big question!!

[Kittycat]

I decided to Upper 2.65 metco and IW (9%) below, and 102 octane fuel...
I've seen some engine damage, the spark plugs were always to blame.

which one is recommended have to take so that it doesn't happen to me?

 

[Marc W]

Who told you the spark plugs are always to blame? A 2.65 upper with a OD lower is a aggressive boost setup. Engine damage with this is more likely a improper tune. Your tuner needs to have his act together.

 

[Kittycat]

Who told you the spark plugs are always to blame? A 2.65 upper with a OD lower is a aggressive boost setup. Engine damage with this is more likely a improper tune. Your tuner needs to have his act together.

i saw this on YouTube, but with 2.85 upper and mostly 10% ATI. All of them had a custom tune for sure, me too. But I think the stock spark plugs are not the best for aggressiv boost like 16-18 psi.

 

[Marc W]

i saw this on YouTube, but with 2.85 upper and mostly 10% ATI. All of them had a custom tune for sure, me too. But I think the stock spark plugs are not the best for aggressiv boost like 16-18 psi.

Most of us here do this at that level on e85. I don’t know what to suggest as far as plugs go for the gas you have available. My guess would be a quality NGK one step colder than stock. First question is do you have a tuner that is truly experienced at tuning Hellcats running 16-18 lbs of boost? Is he also experienced at trans tuning for this setup? At over 900hp you need to have the trans properly tuned for the sake of both the engine and the trans. If that’s not available, I would advise against any of it.

 

[Linda's Hell Cat]

https://highhorseperformance.com/ng...-set-of-16-2009-5-7l-vvt-2015-6-2l-hemi-2309/


I use these and they are gapped 026.

I have upper Metco Lower ATI

Yes Spark plugs are a supporting mod as well as a couple of other parts.

My Hellcat and My Husband Top Cat in 2015 were out T&T R&D of parts and Tuning with Josh@HHP a supporting vendor on here.

Linda

 

[Linda's Hell Cat]

Also I Daily drive with 93 pump gas
And My race Tune is for Q16.
I do not need to change spark plugs for when I pully down for my Daily driving 93 Tune.

Linda

 

[Hemiride]

i saw this on YouTube, but with 2.85 upper and mostly 10% ATI. All of them had a custom tune for sure, me too. But I think the stock spark plugs are not the best for aggressiv boost like 16-18 psi.

I'm hitting 16 lbs of boost with a 2.85 litens pulley on 93 octane is that aggressive?