I was wondering if anyone knows any thing about how elevation effects horsepower? I'm doing a n/a build and people are telling me that I will not be able to break 200whp at my elevation of 4600ft above sea level. Do you think this is true?

My set-up

B18C1
JE 12.5-1(81.5mm)
Crower rods
Darton sleeves
Arp studs

B16 head
Skunk 2 Stg. 3 cams
Skunk2 Valves(high comp.)
Skunk2 Valvesprings& ti retainers
Port and polish
TWM itb's (50mm)
Hondata s200
Walbro fuel pump
Rc 310cc injectors
Msd ignition

Gear speed Stg 2 tranny
z10 crossmember