XTC7 turbo

This may sound stupid but I could not find anything on the search function. The reason for the question is I have one damaged rotor housing and need to get another one.
Does anyone know if there where different versions of the series 5 rotor housings? What I mean is differences in bracings around the inlet and exhaust ports, spark plugs in slightly different positions, ports slightly different.
If this is the case, would it make much of a difference if one housing is slightly different to the other?

Liquid Anarchy

iTrader: (2)

Only difference is in N/A and TII; that's the exhaust "sleeves". As long as you get a housing w/ a diffuser in it, you'll be fine.

XTC7 turbo

Liquid, what do you mean by diffuser?

Node

iTrader: (1)

There is a diffuser in the exhaust port in the housing to cause turbulence to make the N/A's exhaust note less high pitched. Mazda makes an expansion of about 300% in the exhaust port to cause turbulence to help with the noise and with heat I believe.
The N/A has a larger diffuser which people like to swap out in favor of the Turbo exhaust diffusers for better exhaust flow.
I'll try and find some pictures.

XTC7 turbo

If I have a turbo then it does not matter?

Node

iTrader: (1)

https://www.rx7club.com/forum/showth...haust+diffuser


Turbo housings=good

XTC7 turbo

SO Node, Series 5 turbo housings are different?

Liquid Anarchy

iTrader: (2)

No, TURBO housings are different. (S4, S5, & FD are Identical)

I have TII exhaust sleeves (w/o the diffusers) in S5 N/A Rotor Housings.

Oh, and I remembered... there IS a difference in N/A and TII housings. TII housings have a hole that must be plugged (coolant passage for the turbo or something like that)

Node

iTrader: (1)

Hmmm, not sure. There were a few updates between Series 4 and 5 on the engine that made Series 5 a lot better. But I don't know of anything that was changed on the housings themselves.
Better wait for someone with more knowledge about this to answer.

Node

iTrader: (1)

Don't they also have some sorta air something or whatever hole in the exhaust port? Or is that the coolant hole you're talking about.

Liquid Anarchy

iTrader: (2)

Yeah, it does. N/A's have it too. It's under the exhaust sleeve.

XTC7 turbo

The reason for question is my motor is in bits at the shop and there not open for another week. I can get another series 5 turbo housing but am worried it may be different to my series 5 turbo housing? They only have a couple left.

Node

iTrader: (1)

All S5 Turbo housings are the same.

XTC7 turbo

Thanks guys.

Node

iTrader: (1)

Good luck