Hi In PA we do dyno testing up to 9000GVW. ASM 50/15 Dynos are Snap On,ESP and SRX/OTC. there are a few Maxwells here also (no longer a player) that you probabaly put a M1 tank on. Maxwells as a DYNO are the most over engineered /built piece of equipment I hav... Login to read more.