Join Date: May 2004
Location: in my shed in the pit :)
Re: Phase III & IV GTHO Cam Specs
direct quote from precision master engine parts catalogue:
part number: PC330 = mechanical (GTHO phase 3)
valve timing @ .050"cam lift
inlet opens 17 btdc
inlet closes 47 abdc
Exhaust opens 54 bbdc
exhaust closes 20 atdc
inlet lift at valve .569
exhaust lift at valve .590
inlet lobe lift at top dead centre .097
tappet clearance .026 "
lobe seperation 106"
as to your question regarding phase 4 camshaft it was supposed to be of greater specification than the phase 3 but someone somewhere will know.
the ONE thing i know for sure is: no matter how big and nasty YOUR CAR is, someone always has one thats BIGGER and NASTIER. build a bridge and get over it i did.