rover v8 cheapest route to na power
Discussion
to get good RV8 power
get the compression up with a 270°+ duration cam, 10.5:1 is good
junk the distributor and go aftermarket EFi with coil packs
fit a crank speed trigger for your ecu speed reference
use the stiff cro-moly pushrods, the standard items flex alarmingly
port the heads and unmask the valves in the combustion chamber - bigger valves if you can
fit a short trumpet inlet - either cut down the existing item by 40mm on all trumpets of find an old grp A item or go carbon
a larger throttle required for +250bhp and the exiting casting can be bored out to 71 or 72mm
you're also want a decent / adjustable timing gear to time in in correctly with a proper roller chain not the comedy std item
the 4.6 engines are generally good and its the best bottom end ( cross bolted) but I got 283Bhp/ 270 ft/lb out of my 4.0ltr which started life as a 3.5 block
if you do stick with a 4.0ltr fit a set of ARP main cap studs though as you can torque these up higher to counter the cap shuffle and if its the earlier heads do not torque up the bottom row of head bolts
get the compression up with a 270°+ duration cam, 10.5:1 is good
junk the distributor and go aftermarket EFi with coil packs
fit a crank speed trigger for your ecu speed reference
use the stiff cro-moly pushrods, the standard items flex alarmingly
port the heads and unmask the valves in the combustion chamber - bigger valves if you can
fit a short trumpet inlet - either cut down the existing item by 40mm on all trumpets of find an old grp A item or go carbon
a larger throttle required for +250bhp and the exiting casting can be bored out to 71 or 72mm
you're also want a decent / adjustable timing gear to time in in correctly with a proper roller chain not the comedy std item
the 4.6 engines are generally good and its the best bottom end ( cross bolted) but I got 283Bhp/ 270 ft/lb out of my 4.0ltr which started life as a 3.5 block
if you do stick with a 4.0ltr fit a set of ARP main cap studs though as you can torque these up higher to counter the cap shuffle and if its the earlier heads do not torque up the bottom row of head bolts
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