I searched all the threads and articles I could find on the net about how to ID you housings, but I found no photos of mine...

I got an S5 1991 FC3S Turbo2 with a rebuilt motor, and this is how my housings look like. I discovered them while I was in search of the inexistent knock sensor!

Front housing:


Rear housing:


From what model are they? Any help would be awesome!

Thanks a lot in advance!
Marios

 

BRE!!!


you knock sensor hold looks plugged.

 

They're probably just S5 NA housings.

 

The housing in my s5 n/a have the threaded knock sensor hole. When I had the exhaust off I verified the inconel diffusers, so it very likely original n/a housing.

 

Is that the Greek exclamation expression or are the housings from a 13B-RE?

Thank you all for your responces!

So I most likely have S5 NA housings fitted?! NAs are very very hard to find here in Greece, that's why I'm amazed! Only 1st generation RX-7s can be found NA readily, but those I think don't have marks or holes above the T plugs.
I asked the builder but he can't remember a thing and he is 500km away.

I looked the middle iron and couldn't find a knock sensor there either, so that is still S5... Ohh myy, frankenmotor imminent!!

 

im greek BRE!!

 

S5 TII and N/A housings both have the same knock sensor hole above the trailing plugs. FD and 13b-re have the same hole.

They look more like S4 housings, but that little bump is new to me. There have been a few transitional housings, this is possible one of them between the S4 and S5. If you measure the height of the plug holes, you would be able to narrow it down.

Rotor housing ID page we put together some time ago. http://www.banzai-racing.com/faq_housings_ID.htm

S5, FD, Cosmo



S4

 

Thanks for the responses!
Whoooo hoooo didn't know that!!!

Do S4 TII housings really have the L spark plug located higher? In this thread, bumpstart's post state that this is true only in some Zenki NA housings.

Now this housing alternative design thing really is confusing... I could never imagine that interchangeability could be able to take revenge for itself...!!!

 

Read my post in that thread.

 

You're right...

If I measure if this dimension is either 81 or 89mm:


Wouldn't I be then able to determine if it's S4/S5?
I estimated those two numbers (81 and 89) by climaxing the photo to 1:1 by knowing that the housing width is 80mm.

As I can see in the pictures the T spark position is the same for both motors.

I'm asking that cause measuring the bottom of the housing to the L hole will be very inaccurate...

Thanks!

 

The distance between the plug holes, inside bottom lip trailing to inside top lip of leading is 23mm on S4 and 28mm on S5

 

Thank you very very much! I will measure mine today.