105epwr

Hi,anyone here have the above spec in there x-flow?im building one for a favour and im wondering what sort of depth i need his pistons pockerted by?otherwise its going to be a fair ol process!!!

cheers

B16CVH

There is no "real" figures for this, engines which have had material M/C from the deck/head face can drastically effect the depth for pocketing. You will need to leave a clearance gap of 1mm between the piston face and the valve, this allows for expansion and rods stretch at high RPM

IANS2RST

iTrader: (1)

built an engine to this spec years ago in my first car iirc correctly I didn't pocket the pistons & had no trouble but would be worth doing a dummy build & use some plastacine to check the clearance.
word of warning use super unleaded as the compression ratio is quite high & make sure the dizzy is tightened properly. mine blew a piston at about 120 racing a st mondeo cos my dad had filled it up with normal unleaded & the dizzy timing had moved slightly causing det

105epwr

ok chaps thanks-was going to do a dummy build with plastcine but was just trying to save sum time!i have a hot 1.6 x-flow with 1300 piggys in my anglia with a cosworth A2 cam that also didnt need pistons pocketed!best get the dti then!