Need more fuel!!!!!

mr_turbo · #1 15-11-2007, 19:20

does a s13 uprated fuel pump fit striaght in? plus is there any upgrades on injectors or a straight swap upgrade from anouther car?

or is the only way to run a 5th injector on a pressure switch so only works at certain boost?

s13eater · #2 15-11-2007, 19:26

se nissan used to run a 5th injector, crude but cheap, i had one, big tim has my old set up and i think cnhss1 has one for sale, the se one used a metro oil pressure switch, it came on at 5psi, much to soon imho, an ajustable one would be better, just find out where it leans out, then have it come on a couple of psi before.

PukkaSilvia · #3 15-11-2007, 20:17

walbro 255 will fit in the s12 cradle easily. I wrote a how to in the 'how to section'
theres also info in the how to section on fueling . Put some s13 ca18det injectors in with a piggyback ecu

s13eater · #4 15-11-2007, 20:36

aftermarket ecu's can be expensive if your looking for cheap mods, but are the best, the afm's are very restrictive, especially on an 8 valve, where breathing is bad to start with, i think they are about 54mm.

umpkin · #5 15-11-2007, 20:51

i dunno how good this would be, just saw it on ebay.

same lph as a walbro, dunno how reliable they would be.

sideways danny · #6 16-11-2007, 20:19

get some s13 injectors and i'll do an experimental chip

mr_turbo · #7 17-11-2007, 10:08

i was told that s123 ones wouldnt fit?!? lol

i know a fiesta oil pressure switch comes on at 8psi which it slightly better ill have a look in the how to section then cheers guys

s13eater · #8 17-11-2007, 10:17

having the ecu remapped would be much better, if danny will do it you, then i'd av that done, otherwise, for a quick job do the 5th injector, i'd get an ajustable pressure swith, demon tweeks should have one, i'd get it on a dyno and see where it goes lean, then have the injector come in just before that.

blitz · #9 18-11-2007, 05:28

many moons ago HKS has PFC F-con and GCC programmed for S12 silvia and aftermarket ECU. if you're lucky you might be able to find them.

old-and-rusty · #10 18-11-2007, 12:45

Quote:

Originally Posted by blitz

many moons ago HKS has PFC F-con and GCC programmed for S12 silvia and aftermarket ECU. if you're lucky you might be able to find them.

I managed to get a HKS ignition module for my s12, but it was six years ago. Plus all the instructions were in Japanese

and I had to get them translated

.
Don`t think they are still available now though.
Regards,
Ian.