Kodiak544

I was wondering how I could reduce my spark knock I currently run 41-962 AC delco would running lower temp plugs help and if so which one? The only way I can get it to quit is running 93 octane. I have had a spark knock with my old motor and now my new one but not near as bad. I should have told my tuner when I got my tune but forgot.

FFDP

iTrader: (2)

We don't have any idea what you drive and the setup on it, so it's hard to suggest plugs.

Reducing timing is a better way to remove spark knock.

Kodiak544

Sry it's a 2001 gmc Sierra 5.3

ezdaar

iTrader: (1)

ngk 4177.
just run 93 and be done with it.

Kodiak544

Well I was wondering if something simple like a spark plug would help instead of paying 40 cent more per gallon

FFDP

iTrader: (2)

You still never said if the engine was all stock or not.

I'd work with the tune to bring spark knock down and just run mid grade fuel. I barely get knock on 89 octane with factory 41-110 plugs.

Kodiak544

The old motor was stock. The new motor has a 212/218 cam and longtubes the Turner did ask what octane I would be running and I said 87

ezdaar

iTrader: (1)

I cant run anything but 93 and TR6 plugs, My timing/fuel tables are Very aggressive.

01SilveradoJakee

Sounds like you need a new tuner.....

Has some timing out or add tr6 ot TR55 and run 93
Your making it a performance truck. Why wouldnt you run the best fuel you can get? I ran 91 before i even added a performanc part to my truck. Just got that piece of mind.