Hondata

Prelude with standart boost JRSC, 255 hp at the moment. After some cold days (-15C) my 342HP Walbro pump went to hell . I've put old one , stock Denso pump. And don't want to order new Walbro for a while.
Maybe will be better use stock pump, but change injectors with 440 or 550?
And should I make add modifications in that case?

Are you using some sort of engine management or just an FMU?

I'm going to set up the Hondata nearest time.

And my question about larger injectors&stock pump arised after reading
Hondata tech "But, if you run your stock fuel pressure (say 40 psi)
and this stock fuel pump, 650cc injectors will easily provide you
fuelling for low 300 wheel HP. Honda computers will easily idle a
1600cc engine on 720cc injectors."

I think that DENSO pumps are more reliable in our COLD winter than
Walbro. When I was driving Chevy, I changed OEM pumps every winter.
But on Honda dealers station changing of original pump is absolutely
rare case.