Injectors,Fuel Rail

[John RX7]

Hey,

I\'m aiming for about 340-350 bhp on my standard twins for my FD3S rx7,im i correct in thinking that the standard injectors will max out and i will need to upgrade,also the fuel rail can anybody shed any light on this

John

[brundish24]

I think that 350 is the max on twins and you will need to upgrade the fuel rail you can put in a full set of 850s I believe or add 1680s the fuel pump will need to be upgraded too and ofcouse a remap.

[RXSpeedy]

850\'s all around but you will need you primary rail machined to allow the 850\'s to fit correctly. Or you can just get a secondary rail with 1680\'s and leave the 550\'s which is from what ive heard easier to map for idle. I\'d get a Bosch 044 just for piece of mind as well.

[John RX7]

where would I get the primary rail machined,do i have to take it of the LIMwould it be 4 850 injectors?ok change fuel pump

[RXSpeedy]

Any machine shop can do the job with the correct machinery. http://www.mazdarotaryclub.com/forums/showthread.php?t=65332&highlight=850

The primary rail is on the block the secondary rail is on the lim so that can stay in place. yeh 4 850 injectors all around.