Hi,

Away to send my heads off for a bit of work. What sort of compression should i be looking at for my engine build? Will be used for hillclimbs/sprints only.

Engine spec:

2.5 built.
Crossdrilled/balanced crank
acl Big end+mains full race bearings
LP 'H' section rods+arp bolts
Mahle forged pistons
ARP head bolts
Cometic 1.6mm gaskets
V6 heads + valvetrain (matched for 2.5 and ported/polished)
Ported inlet manifold
Ported/knife edged throttle body
TD06-20g ported inlet
Grp.A oil feed
Apexi pfc +avcr
pwr rad.
Samco hoses
hks fmic + i/c spray (pipes wrapped)
hks headers (ported/wrapped)
aps DR exh.+outlet (ported)
H+S up-pipe (wrapped)
SX fpr + walbro
hks 740 inj's
Billet fuel rails
Manifold spacers
MRT inlet + K+N/airbox
RCM pullys (no a/c)