I rebuilt my FD3S ebgine and made some modifications . Over lap, bridge port, new fuel raíl, new lower 850cc injector, 1,600cc in high, dual Bosch.044 fuel pump, 3.5" exahust and new Garret 70mm Turbo. I deleet te métrica pump, and use in tank premix.
What spark i need fot this engine?
Thanks.

 

Welcome to the board.

If you're simply asking which plugs to try, then try the NGK Competition plugs (11.5s).

 

I'm using the NGK BR10EG in all four right now and they pull great all the way to redline. Before these I used BR10EIX's and they did well too but got some ignition break up at high rpms, mostly cause it was a little too rich but the forums say good things about the BR10EGs. I'm currently running 1050cc primaries and 2000cc secondary's with full premix and water/meth. SakeBombGarage IGN-1A Ignition coil kit in direct fire.