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View Full Version : Brazing rear iron dowel on S4 13BT??

FC3S Murray
05-05-2009, 11:10 AM
I have heard of earlier tuners doing it before the 13REW came out.

Anyone here done it OR seen it?
TehMonkay
05-05-2009, 07:38 PM
No but i'm interested in hearing more
FerociousP
05-05-2009, 07:52 PM
what would this do?
TehMonkay
05-05-2009, 08:21 PM
prevent cracking the dowel landing.
drewski86
05-06-2009, 09:07 AM
I'm sure you'd have better luck picking up a S5 or REW rear iron.
FC3S Murray
05-06-2009, 11:07 AM
just ordered a brand new S4 rear iron that comes from Mazda with the updated FAT casting.
TehMonkay
05-06-2009, 11:09 AM
just ordered a brand new S4 rear iron that comes from Mazda with the updated FAT casting.

How do you know it does? I need more info.
FC3S Murray
05-06-2009, 12:07 PM
Mazdatrix told me so. :) They stated every new S4 rear iron comes with the updated casting seen on 13REW's.

They also recommended I replace my rear rotor housing becasue they state every rear iron break they have seen causes the rear rotor housing dowel hole to "oval". I asked for some measurement tolerences from them since the FSM doesn't specify.

I am awaiting a response.

Since I have a hair line crack and I pushed 17 psi once on low compression rotors when my WG went tits up(15.4 psi is my normal boost), I am skeptical that my rotor housing is "stretched". I guess I will see once I pull it apart.
classicauto
05-06-2009, 01:07 PM
Yep at this point, all of the OEM stock is the later casting/thicker casting babies.

Interesting point about the ovalling of the dowel land in the housing, never thought about that but it seems to make sense - check it for sure though :)

Oh and have fun with the OEM iron's ports :lol: They're usually rougher then jason statham's stuble.
FC3S Murray
05-06-2009, 02:37 PM
Oh and have fun with the OEM iron's ports :lol: They're usually rougher then jason statham's stuble.

Don't tell me that dude! I am already dreading attempting my first port job. I might practice on a scrap iron just to make sure I don't scar a 375.00 dollar part.
need RX7
05-06-2009, 02:44 PM
Don't tell me that dude! I am already dreading attempting my first port job. I might practice on a scrap iron just to make sure I don't scar a 375.00 dollar part.

Yes, it definitely takes practice. I tried it out on a junk iron before and made fatal mistakes multiple times. I do not recommend using a brand new iron for your first attempt at porting. :rofl: You could probably pick up a junk iron or 2 for fairly cheap to learn on.