what will happen if i fit some injectors
 

goin from 440 to 740 on the injectors on my car

iv been putting off fitting them as im scared its just gunna chuck a shed loada fuel into the engine and cause det.

iv got a fuel reg but its not fitted yet..is there anyway i could wind down the pressure if i fit the fuel reg - or will fitting them be fine aslong as i dont drive on boost?

nightmare! :wonder:

i'm doing same thing 740's sat here with 20g but waiting till weekend before remap to fit
:)

its gunna overfuel its tits off init if i do it now.

yes mate leave it till as late as poss :)

the day of mapping then lol

i had a feeling it would do that

cheers!

If you fit them and drive in closed loop mode you will be fine - it will be running massively rich but it will trim that back automatically to a degree but wont be able to trim it completely.

Ideally you would have a WB or atleast a fuel press gauge.
Then fit the adjustable fpr and wind down the pressure.
It won't solve all problems, you should still do it as late as possible before remap.
It'll still run very rich, dynamix advice sounds sound :)