I am thinking about trying "the impact method" to remove my spark plugs. I am getting a little off brand 3/8 cordless impact and I think its torque rating is gonna be somewhere around 80-90ft lbs.

Will that be enough to remove the plugs? I see the snap-on one has about 150ft lbs.

 

No I don't think it will be enough. I used my Dewalt DC827 which has about 110 ft lbs and it barely had enough torque to loosen it.

 

I used a 3/8" torque wrench set to 30'lb and took my time to get all out without breaking them.

 

The impact should at least have150ft pounds....
Even though I use an impact on plugs I always crack em loose an 1/8th turn and let them soak with carb cleaner....
I put them back in at 28ft lbs....