FD Irons on 13BT

fullspeedrx7 · 09-07-2009, 09:37 AM

can FD irons be used on an S4 or S5 13BT block?

moremazda · 09-07-2009, 09:57 AM

Yup, but then it's no longer a S4 or S5 block. Effectively the plates are the block since they dictate the intake manifold.

fullspeedrx7 · 09-07-2009, 11:07 AM

so if i used the 13B-REW irons on a S4 13Bt rotating assembly, i'd have to use the 13B-REW LIM and UIM?

***TitaniumTT*** · 09-07-2009, 06:57 PM

Yup, and get the center plate machined to accept the FC motor mounts. Basically at that point you're doing an REW swap

mazda_wes · 09-07-2009, 08:47 PM

i recommend using stock housings if using stock irons. cosmo re swap is more fun anyways, from what i have been told.

RETed · 09-07-2009, 11:47 PM

Short answer, NO.

The intake ports do NOT line up with the intake ports off the lower intake manifold.

FD engine mounts are located on the rear iron underneath.
The stock FC oil pan does allow use of them properly.

The FD front iron is shorter, so the stock FC oil pan does not line up properly.

-Ted

fullspeedrx7 · 09-08-2009, 12:40 PM

thanks ted, and so basically for a stronger block w/o pinning, i should probably just get S5 irons and be done with it.

RETed · 09-08-2009, 01:29 PM

That's my recommendation...
That's the easy route for building a stout 13BT that has proven to handle 400hp+.

-Ted

09-07-2009, 09:37 AM	#1
fullspeedrx7 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 6 Rep Power: 0	FD Irons on 13BT can FD irons be used on an S4 or S5 13BT block?

09-07-2009, 06:57 PM	#4
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Yup, and get the center plate machined to accept the FC motor mounts. Basically at that point you're doing an REW swap __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

09-07-2009, 09:57 AM	#2
moremazda shookmotorsports.com Join Date: Apr 2008 Location: Rockford, IL iTrader: (1) Posts: 108 Rep Power: 17	Yup, but then it's no longer a S4 or S5 block. Effectively the plates are the block since they dictate the intake manifold.

09-07-2009, 11:07 AM	#3
fullspeedrx7 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 6 Rep Power: 0	so if i used the 13B-REW irons on a S4 13Bt rotating assembly, i'd have to use the 13B-REW LIM and UIM?

09-07-2009, 08:47 PM	#5
mazda_wes Rotary Fan in Training Join Date: Sep 2008 iTrader: (0) Posts: 79 Rep Power: 17	i recommend using stock housings if using stock irons. cosmo re swap is more fun anyways, from what i have been told.

09-08-2009, 12:40 PM	#7
fullspeedrx7 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 6 Rep Power: 0	thanks ted, and so basically for a stronger block w/o pinning, i should probably just get S5 irons and be done with it.