Where to buy larger injectors?

[muffdan]

Guys,

I'm looking to buy some larger injects, 550cc or larger. Anyone know a uk supplier I can order them from at a good price?

I'm thinking Denso, anyone have a different opinion?

Thanks,

Jason

[markiii]

380cc from MWR 550CC from MWR

however unless you have a standalone ECU don;t go too big, piggybacks don;t seem to be too happy with anything over 500cc

[muffdan]

MWR is my present choice, but shipping time is a concern and it costs a fortune to get them shipped inside a week! I'd like to find a supplier in the UK but if there aren't any then there's not much I can do about it.

Does an ECU/piggyback combo struggle because of the larger pulse time needed? If so, My uprated fuel pump giving a higher PSI should allow me to run bigger injectors right? 550cc are probably the minimum I need.

[markiii]

it struggles because the stock ecu is controlling fuelling

the piggyback tricks it by fiddling teh airflow signal to persuade the stock ecu to do what is needed

go too big and teh fiddle factor is so high that the airflow signal ends up outside a range that the stock ecu understands

[muffdan]

ok, thanks Mark!