Is this for undoing 748/996 rear wheel nuts?
Someone said the other day (yesterday?) that they used a off-the-battery impact driver successfully for this.
Looking at the list in the ebay link, even the chunky DeWalt DW056 has a max torque rating of 1170 in-lbs = 97.5 lb-ft = 132 Nm according to my phone calculator.
Sounds like that'd struggle to me.