[mrjoshua]

I know this is a place for engine questions but I figured I would find the right person to answer this here. I'm looking to get an electric impact wrench to take with me to the lake. Most I've seen draw 700-800 watts. Any idea what size power inverter I would need to run one off my truck? Chevy Duramax with dual batteries.

 

[74challenged]

What are you looking to break loose? What torque spec? Only reason I ask is the craftsman 1/2 cordless does lugs over 100 ft lbs. I help a class 9 race car (off road buggy) and its a vital piece of equipment.

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[mrjoshua]

Not sure what lugs on a 2500 chevy are torqued to. I've got a few back problems. Figured it would make changing tire on truck or trailer easier.

 

[74challenged]

Man I'll tell you those cordless impacts are awesome. They're light weight and last. If you know anyone who's got one give it a try. When I torqued down my in-laws 2500 lugs I think it was 75 ft lbs. It'll also be much easier to carry and no setup time as long as the battery is charged. I'm unsure if there is an inverter strong enough to handle decent torque spec. They draw a lot of juice.

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[gn7]

Unless you have some other use for an inverter, I would break down and spring for the Snap On 18v CT6850 1/2" impact.
620lb breakaway and 400 output. A wee bit over rated IMO, but it can EASILY over torque a BBC head bolt in a blink, and I guaranteed it will rip the wheels on your Duramax in a blink.
They list for 600.00, but you see them on Ebay a lot cheaper with spare batteries.

It is hands down the baddest battery impact on the block



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[Scapegoat]

Unless you have some other use for an inverter, I would break down and spring for the Snap On 18v CT6850 1/2" impact.
620lb breakaway and 400 output. A wee bit over rated IMO, but it can EASILY over torque a BBC head bolt in a blink, and I guaranteed it will rip the wheels on your Duramax in a blink.
They list for 600.00, but you see them on Ebay a lot cheaper with spare batteries.

It is hands down the baddest battery impact on the block

I use this around the shop and throw it in the truck as basic tool for emergency on road trips. Along with a torque wrench. 2500 trucks torque species 150'lbs.

 

[jetjunky]

a decent 1/2" breaker bar and a 3' piece of pipe can be foot operated and go a long way in dealing with stubborn lugs etc. and cheaper too. you can then use a cheaper cordless impact to speed up running lugs etc. on/off just a thought haha