[glassdoctor]

This isn't a scientific answer... but I would do the 1515 for any modded emaxx or larger truck. If it's a lightweight maxx (lots of stock/plastic) the 1512 is more than enough still.

I had great results with the 1515 in both 1/8 buggy and truggy... but I also get awesome results with the 1512 in my buggy. I have not run the 1512 in the truggy yet. I should do that sometime just to see... maybe put to rest many questions about what it can/can't do.

Others have run the 1512 in some big trucks and were very happy with it, but didnt' have a lot of data... temps etc.