Originally Posted by xr4x4rs
fully lightened and balanced bottom end
cosworth forged grp a pistons +25 7.2:1 cr
polished and ported head
bd14 inlet and exhaust
verniers
t35 stage 2 hybrid .63ex
mongoose exhaust system
2wd drive manifold
external wastegate
grey injectors
500 intercooler
spec-r grp a twin pot breather system
turbo pre rad
all arp bolts bottom end and flywheel
Very nice spec - but with that comp ratio (7.2:1) I would seriousely consider a change of turbo to a T4. The T34 will give you 400-412 BHP absolute MAX (@ 26-28 LBS/PSI)...and it will be working VERY hard to achieve that figure......If you fit a T4 turbo (or a GT Series equivelent) you can then take full advantage of that nice low comp ratio by runuing higher boost safely (32-34 LBS/PSI) and get an "easy" 460 BHP......and to a T4 that 460 BHP will be a "walk in the park"....i.e. fairly unstressed
ALSO - If you ditch the greys and fit 750 - 1000cc MSD intectors you will get nearer to 520-540 BHP with good torque - no problem AND if mapped correctely with closed loop lambda very good emissions/idle behavior.
Ask Mark Shead (NA Developments) for confirmation
