MOBEONER

iTrader: (18)

i was told that all injectors 850cc and higher are all low impedance.now if i run 1000cc injectors for top end will i need resistors for them ?

in other words- i dont know if i can runn the stock hi impedance 550cc primary injectors and 1000cc low impedance secondarys injectors on a microtech lt12s with out resistors?


will the 1000cc injector fit in the stock turbo fc fuel rail???
or is the rail too small for 1000cc??

13BT_RX3

You should measure the resistance with an multimeter to confirm what you have. On page 3 of the manual Microtech discusses injector resistance, see link and attachment. The info looks a bit unclear and they suggest that you contact them if you have trouble, but they will probably never answer you. My interpretation is since V=I*R and V=~11-15V, lets call it 15V. And too much current is pobably what the ecu is afraid of. They state a minimum impedence of 1.5ohm with a single injector. 15V/1.5ohm= 10A. If you went to a lower impedence the current would go up and may pop something. So I wouldn't go any lower than a combind resistance of 1.5ohm. Personally I would leave a buffer too. More resistance sounds safer. And wire in parallel per Microtech's recomedation.

They say to use up to 4 (12-16ohm injectors). 4 12s would be 3ohm (from: 1/((1/12)+(1/12)+(1/12)+(1/12)) = 3) and 4 16s would be 4ohm.
http://www.microtechefi.com/software/ltmanual.pdf

MOBEONER

iTrader: (18)

wow i didnt think it was this technical.i will do my home work on this!!! thanks a million!

any more info you have please post it here.