Hey guys i have a s7 1997 model jap import FD that has had a s6 engine fitted to it as old owner blew it up, now i am looking at fitting a power fc and i went on the Apexi site and they say the part number for 1997 should be 414BZ005 Mazda RX-7 FD3S (Ver. IV) 1996-1998 13B-REW but i am unsure what year model the engine is.
now how do i tell what computer i need and also how come ones in AUS dont have the same part number as i found a second hand one for sale and the guy said the part number is pfc fd3s4 020-2803 and the controller has part number fcc3 020-12617 and was fitted to a s6 1996 model.
So i want to know what one should i buy and how do i tell what model my engine is as i got no idea how to tell and owner didnt know.
Thanks guys

can anyone help me out here

probably depends on the wiring loom and computer they used when they did the swap.

OK THANKS MATE
how can i tell the difference between the s6 & s7?

Anyone know how to tell the difference between s7&8 harness and the s6 one please??

The ecu is different, for the S6 you need the 8-bit version, not the 16-bit version as used in the S8.

I have a Jap spec S7 and I'm running a PFC, I am taking delivery of it on Monday as it cleared customs and AQIS yesterday. I will check what the part number is on it and post it up here for you. Yours may have a S6 block in it but with Jap spec S7 loom, manifolds, vacuum box etc.

You could see by looking under the top half of the manifold and check if it has a vacuum box or the rats nest. Take some pictures of around the engine and under the top half of manifold and post them up here.

Thank you so much mate i definatly will do.
Thanks for your help i greatly appreciate it glad you can help.