LS1TECH - Camaro and Firebird Forum Discussion - Spark plug question for experienced tech.'s or racers please

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LS1-450

11-26-2005 08:26 AM

Spark plug question for experienced tech.'s or racers please

My car loves Autolite 103's gapped @ .042". Has intake, heads, & mild cam. I know that many people use NGK's, but, mine seems to like these best. Anyone know a lot about these old faithfull's? Is there any advantage in increasing the gap to say .046? Car makes 380RWHP & 420 #-ft. tq.. Thanks. :)

BlackHawk T/A

11-26-2005 10:23 AM

I would think a bit bigger gap would be better...say .050 or so.

LS1-450

11-26-2005 10:38 AM

Quote:

Originally Posted by BlackHawk T/A

I would think a bit bigger gap would be better...say .050 or so.

What is better about the larger gap?

z-ya	11-26-2005 07:56 PM

A little larger kernal to start the burn

LS1-450

11-26-2005 08:47 PM

Quote:

Originally Posted by z-ya

A little larger kernal to start the burn

Thanks. I know that .055 causes my car to backfire. BlackHawkT/A has suggested .050". So, maybe working my way towards .050" is the way to go. Will start with .046" & see what happens. :)

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