My Jdm motor is confusing me.

[Raksj04]

Originally Posted by RETed

Are the fuel rails cast aluminum or tube steel?
Cast aluminum = S4
Tube steel = S5
Also, JDM motors typically have the fuel routing backwards:
fuel line from fuel pump -> fuel filter -> *secondary fuel rail* -> *primary fuel rail* -> fuel line return back to fuel tank

The US-spec 13BT's always go primary fuel rail first and then secondary with the FPR in the secondary rail.



S4 = center iron
S5 = (rear?) rotor housing




Sounds straight up S4 to me...


-Ted

one is cast one is steel.