Water against detonation with Nitrous

[NathanStewart]

A 15:1 compression ratio sounds a bit high for boost.  In a watercooled four cylinder auto application I've seen CRs as high as 11:1 boosted to 20+ psi with methanol.  I want to say I've even heard of a boosted 14:1 Honda motor but I guess things like your cam profile will ultimately decide your dynamic compression ratio.  I don't think there is a certain right answer here because your tune will also greatly affect your detonation threshold. 

I really shouldn't even be trying to answer this.  Where's LeFevers at?

[oz]

i thought that may be the case i reckon i will drop it to 10-11 to 1 or maybe even 12 to 1 and throw a bit of water in for good measure
cheers oz