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

Quote:

Originally Posted by FC3S Murray

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

They're usually rougher then jason statham's stuble.

FC3S Murray · 05-06-2009, 02:37 PM

Quote:

Oh and have fun with the OEM iron's ports

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

Quote:

Originally Posted by FC3S Murray

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.

You could probably pick up a junk iron or 2 for fairly cheap to learn on.

05-05-2009, 11:10 AM	#1
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana Posts: 611 Rep Power: 17	Brazing rear iron dowel on S4 13BT?? I have heard of earlier tuners doing it before the 13REW came out. Anyone here done it OR seen it? __________________ Same pig, new soul

05-05-2009, 07:38 PM	#2
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	No but i'm interested in hearing more __________________ My car blows up everytime I start it, it's rotary

05-05-2009, 07:52 PM	#3
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro Posts: 1,046 Rep Power: 19	what would this do? __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

05-05-2009, 08:21 PM	#4
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	prevent cracking the dowel landing. __________________ My car blows up everytime I start it, it's rotary

05-06-2009, 11:07 AM	#6
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana Posts: 611 Rep Power: 17	just ordered a brand new S4 rear iron that comes from Mazda with the updated FAT casting. __________________ Same pig, new soul

05-06-2009, 09:07 AM	#5
drewski86 Slow Join Date: Jun 2008 Posts: 38 Rep Power: 0	I'm sure you'd have better luck picking up a S5 or REW rear iron.

05-06-2009, 12:07 PM	#8
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana Posts: 611 Rep Power: 17	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. __________________ Same pig, new soul Last edited by FC3S Murray; 05-06-2009 at 12:15 PM.