Hi, I have a 98 GT bone stock with exception of k&n replacement filter. I just ordered a Sniper Tuner yesterday with the intention of running 93 octane fuel, will my ignition be hot enough to get a complete combustion? I have duralast wires and NGK plugs; Do either of these need to be replaced also?

Thanks

I'm loving the forums already

 

Nope. I don't know at what point you do need to upgrade ignition but it's nowhere near the first few bolt ons or powertune. I think any kind of spark is still gonna ignite aerated gas even at a highter octane plus if the tune advances the spark it's going to be lighting up a compressing charge.

 

higher octane requires more timing

EDIT: actually its the other way around.. the only reason for using higher octane is to run more timing.

 

Thanks for the quick reply, I know when I run 93 octane I can "advance the spark" with the tuner, but I dont exactly know what that means.. anyone mind explaining stuff to a kid? Also dont you have to physically alter the engine to increase compression?

 

yes to increase compression your going to need to change physical things on the motor. and by advancing the spark, im pretty sure thats just another way of saying timing.

 

Advancing the spark means that that you light the sparkplug earlier to ignite the a/f mixture. At stock settings you are not reaching max pressure in the cylinder by the time the piston is top dead center. Stock is somewhere around 10 degrees before top dead center. So advancing it to 14* BTDC Gives your engine more time to increase the pressure. To much timing and not enough octane will raise the pressure to fast and cause the mixture to ignite before the flame front gets to hit which is called detonation and will destroy and engine fast, also to much advance will increase the pressure to much and will push the piston down before it reaches TDC.

 

alright thanks for the clarification, should I even bother with a CAI or just leave my replacement filter alone?

 

CAI is a waste of money.

 

thanks, what "cheap" mod would you suggest then?

 

driver mod

or gears