My Jdm motor is confusing me.

[RETed]

Originally Posted by Raksj04

I swapped in a JDM motor that is suppost to be a S4 motor, but it looks like the Primary fuel rail has a Pluse damper built into it, which I thought was S5,

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.

there is a Knock sensor in the center iron.

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

However the Turbo has a twin scroll actutor, the alt is a S4 plug style. I noticed this while I was changing a broken fuel line. I am not worried or anything just confuzzed. Is it just JDM or is it a s4.5 or something?

Sounds straight up S4 to me...


-Ted

[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.

[RETed]

Originally Posted by Raksj04

one is cast one is steel.

Wow, someone put together a mix-n-match special... :P


-Ted

[Raksj04]

Originally Posted by RETed

Wow, someone put together a mix-n-match special... :P


-Ted

This is why I was confused. I thought I also removed a PD when I swapped the motor. Which I thought was on the front of the secondary fuel rail but I maybe mistaken, it was years ago and I might be thinking about my N/A motor.