Haha okay your best bet is a remap then, I'm sure if you tell the Tech you want foot long flames they might advise against it but they'll do it. The only other mod you could do which I've just ordered it to install a WOT box, you can set these up in a number of ways I.E. it can cut ignition and fuel or in your case you can just cut ignition and let the fuel flow into the exhaust manifold I'm sure that'd get a few flames going.
WOT Box would be the cheaper option of the latter but can be fairly difficult to install.