Hope your not going low ohms,,,, not that such a device as your looking for will handle below .5ohm.
Think about the unit you want,, Imagine your sitting on it on your car seat,,,, First you feel the a@*^s burn,,, And next a piece of your a@*^s is missing..
At any point, why would you want this. The average long pull, ( mouth to lung is 3-5 seconds .)
You might be wanting ( pbusardo's 4000 TC )
Here is the link: