This is the original engine spec that would have been used in the TR7 which would have made for some interesting driving!. If I had stayed with this then the car would have been running now, albeit highly stressed and high 12 / low 13 1/4's. Estimated power output was around the 275bhp range, and this would have been used with the addition of around another 100bhp extra on nitrous.
Rover engine spec :-
3.5 SD1 block 20 thou deck on block 5 thou piston to deck height
High Compression pistons running a Moly Ring set (compression ratio calculated at 11.02/1 on the old pre SD1 heads)
Stage 3 Vitesse heads originally from Real Steel, ported & polished, large intake & exhaust valves
Balanced Rods ARP bolts
ARP head & mains studs
Kent 224 Hydraulic with Rhodes lifters and a 248 Mechanical with solid lifters to try)
Steel timing gear
Lightened Flywheel
Hi Vol oil pump
Adjustable push rods
Holley 390 double pumper 4150 race series (Keith Dorton ltd edition) along with a Holley 600 Double Pumper as 'back up'
Wildcat open plenum manifold
Holley blue top pump fuel pump
MSD 6AL ignition
MSD timing computer (pre-set timing curve) with auto retard for NOS
MSD billet dizzy
Magnecor KV85 Ignition leads (8.5mm)
Headman headers
TH350 auto with manual valve body and custom Torque Converter