water/meth or not

I got a AEM 30-3300 kit. works on internal map sensor. it was set to come on at 4 psi and spray to a max of 20 psi. it is progressive. the last few days I have hooked up a small air regulator to it to simulate boost and the damn thing won't fault. go figure:wack:
the previous dyno session a week earlier it worked faultlessly.
AEM do a Failsafe add on that logs the system etc. may be worth looking into.
we were at 640 ish rwhp when the piston said "ENOUGH". was about to get the camera rolling for the next pull. oh well.
putting ali heads on this time round. and have filled the block to 1" below the water inlet holes.

so water/meth 50/50 is the go then.