Here in New Zealand all chassis must incorporate a crumple zone for frontal impacts. Has any one built one here in NZ that can tell me how to do this in accordance with the Hobby car technical manual. I am using the McSorley chassis plans and think i can easily modify them.

I'd suggest you contact these guys:

http://www.constructorscarclub.org.nz

Found this;

http://www.lvvta.org.nz/newindex6.html#frontal

Isn't a scratchbuilt exempt?

it would now appear not, the latest NZHRA Hobby Car Technical Manual specifically has a section on Frontal Impact requirements for custom built space frame chassis.

Hmmm, that Hobby Manual would be very interesting to read. However, getting one to the U.S. might be a bit much.

My Land Rover used to have a sticker that said "My Crumple Zone is the Car in Front"
Maybe not politically correct, but was technically correct.

Intresting:
http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=7&pageid=2144416781

Should be equal to the kinetic energy just before the crash impact, I think.

Honeycomb information:
http://www.hexcel.com/NR/rdonlyres/599A3453-316D-46D6-9AEE-C337D8B547CA/0/HexwebAttributesandProperties.pdf