Purchased a modified throttle body from Japan and it arrived today.
Also got an adjustable pressure regulator.
Fitted it all up today with the standard injector.
I don't have a fuel pressure but measured spring heights and added 1mm of adjustment.
Seems to rev more freely and had a small flat spot.
Adjusted the regulator a half turn and that fixed the flat spot.
I found an injector that flows 810cc and that is on the way from the US.
Out of an SPI shitbox dodge which appeals to me.
I'll fit that when it turns up back the pressure of that half turn and see were I'm at.
The regulator has a vacuum enabled spring chamber that effectively weakens the spring load at idle, off throttle and part throttle situations.
This seems to work nicely.
Runs just like an SPI should.
I have used the heat control flap vacuum supply as my vacuum source.
May not need it with the 810cc injector.
I had been persevering with an SC Delta 400 and their throttle body for the last 12 months and swapped it back for standard SPI gear in frustration.
I'd already paid for the Japanese TB when I recently learned that SC have released firmware that actually caters for a JDM SPI like mine.
I have a dilemma looming and will evaluate both systems ahead of my rebuild.
I have a 5 speed lost on a corona boat somewhere between here and the UK.
I have an SC tough crank and SC rods, MED lightened flywheel, SW5, some 1310cc pistons and a Quaife to fit once the gearbox is here.
I think I can achieve a reliable 90 hp with SPI gear and maybe 95 hp with the SC Delta gear.
My preference is SPI at the moment as I like the load sensing (MAP) of the rover stuff.
At the moment I'm running an LCB, SC Supersport head, K&N filter in the standard airbox, Cooper intake and 1.5 rockers.
I feel I'm making what the Cooper kits say they can except i'm in front of their SPI kit because of the 45mm TB.