Welcome to the Australian Ford Forums forum.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact us.

Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated.

Go Back   Australian Ford Forums > Club and Speciality Forums > Forum Community Car Clubs > AU Falcon.com.au

Reply
 
Thread Tools Display Modes
Old 12-06-2016, 09:36 AM   #1
OzriderXR8
Regular Member
 
OzriderXR8's Avatar
 
Join Date: Dec 2015
Location: West of Melbourne
Posts: 488
Default AUII XR8 200kw - Torque Increase

Hi All

I'm sure it's in here somewhere......

What would be a recommendation on increasing torque on the XR8, I'm not fussed about top end or anything else I can't actually use.

Car is not a daily driver but I still want to be able to drive to Adelaide or similar without ruining the national economy.

So far as far as I know everything is pretty stock with an auto, all it has is a Redback cold air intake and a Redback 2.5" Cat Back single exhaust.

I'm not looking at engine surgery, just economic bolt on type stuff.

Any ideas?
__________________
Cheers Ozrider

AUII XR8 200KW
FG MK2 XR6
Mini 850
Rover P5 3 Litre Mk1
OzriderXR8 is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 01:43 PM   #2
madmelon
FF.Com.Au Hardcore
 
Join Date: Nov 2006
Location: Sydney
Posts: 1,337
Default Re: AUII XR8 200kw - Torque Increase

Hurricane 4-2-1 Headers

If you want new cats/don't care about emissions compliance, get some 100CPI metal cats and put them about 300-400mm behind where the collector merges on the headers

A single 2.5" exhaust might be a bit of a restriction. Single 3" probably better and twin 2.5" better again. (I've got the twin 2.5" and it sounds unreal)
madmelon is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 02:02 PM   #3
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

OZ, would you want to go down the chip path? I've been thinking of doing it.
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 04:47 PM   #4
Bossxr8
Peter Car
 
Bossxr8's Avatar
 
Join Date: Dec 2004
Location: geelong
Posts: 23,192
Default Re: AUII XR8 200kw - Torque Increase

Lower diff gears are the best way.
Bossxr8 is offline   Reply With Quote Multi-Quote with this Post
3 users like this post:
Old 12-06-2016, 04:48 PM   #5
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

What ratio diff in a ute?
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 04:58 PM   #6
Bossxr8
Peter Car
 
Bossxr8's Avatar
 
Join Date: Dec 2004
Location: geelong
Posts: 23,192
Default Re: AUII XR8 200kw - Torque Increase

Depends if auto or manual i guess. Auto i would say 3.9 or 4.1.
Bossxr8 is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 05:00 PM   #7
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Thanks Boss, will I only need to buy the guts of the diff or a whole new one i.e axles
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 05:01 PM   #8
Bossxr8
Peter Car
 
Bossxr8's Avatar
 
Join Date: Dec 2004
Location: geelong
Posts: 23,192
Default Re: AUII XR8 200kw - Torque Increase

Just the ring gear and pinion.
Bossxr8 is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 05:42 PM   #9
inventiv
Regular Member
 
inventiv's Avatar
 
Join Date: Dec 2008
Location: Sydney
Posts: 128
Default Re: AUII XR8 200kw - Torque Increase

What about the 70mm throttle body from a 220kw engine?
inventiv is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 08:31 PM   #10
OzriderXR8
Regular Member
 
OzriderXR8's Avatar
 
Join Date: Dec 2015
Location: West of Melbourne
Posts: 488
Default Re: AUII XR8 200kw - Torque Increase

All great suggestions but all have a heap of conflicting info re benefits.

I've chipped a couple of bikes and you get the performance but usually at the expense of fuel. No real performance, just different fuel mapping.

If I change the diff ratio I get better acceleration but loose cruising economy.

I guess I'm looking for the old style carb type thing with 2 barrels until you put your foot down and open the secondaries. Vtec style....
__________________
Cheers Ozrider

AUII XR8 200KW
FG MK2 XR6
Mini 850
Rover P5 3 Litre Mk1
OzriderXR8 is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 08:35 PM   #11
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

Get it tuned, youll notice a difference, chuck some 3.9's in its not that bad.
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 12-06-2016, 08:42 PM   #12
Strattos
Regular Member
 
Strattos's Avatar
 
Join Date: Oct 2011
Location: Mildura
Posts: 353
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by OzriderXR8 View Post

If I change the diff ratio I get better acceleration but loose cruising economy.
Re the diff gears, I haven't done it myself, but have read other threads where there wasn't necessarily a heap of difference in fuel economy, or not enough that it didn't justify the torque gains in lowering the gearing, depending on how low you go of course.
__________________
Current: 2000 AUII XR8 manual ute.
1966 XP Pursuit ute.
2012 Honda Euro manual (daily drive)

Past: 1984 XE Falcon sedan 4.1L.
Strattos is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 08:46 PM   #13
LyleXR8
FF.Com.Au Hardcore
 
Join Date: Sep 2009
Location: Kalgoorlie
Posts: 712
Default Re: AUII XR8 200kw - Torque Increase

Diff gears are already good in an AU XR, my manual is well over 2,000rpm at 120, can put a normal falcon diff in to lower revs, dunno how it effects economy or torque though
LyleXR8 is offline   Reply With Quote Multi-Quote with this Post
Old 12-06-2016, 11:55 PM   #14
T MAN
Regular Member
 
T MAN's Avatar
 
Join Date: Jan 2006
Location: Sydney , N.S.W
Posts: 427
Default Re: AUII XR8 200kw - Torque Increase

diff gears are a good start, gives it a more lively feel, i run 3.91 gear and its no different on fuel as you dont need to load it up as much to get to the speed limit, rpm at 110 isnt to bad at 2500rpm at 110 kmh..

if you want to go for the tunning route can get nice down low torque improvement from a couple of degrees of timing and depending on what or who tunes it, the ecu actually has torque reduction strategies in the ecu that reduce timing under hard load in 1st gear to prevent trans damage, removing these functions make nice improvements...
T MAN is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 13-06-2016, 08:40 PM   #15
Bossxr8
Peter Car
 
Bossxr8's Avatar
 
Join Date: Dec 2004
Location: geelong
Posts: 23,192
Default Re: AUII XR8 200kw - Torque Increase

I got better economy around town with 3.9's, and made hardly any difference on the highway. Not enough to make much of a difference anyway.
Bossxr8 is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 08:45 PM   #16
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

i will own up to fuel economy going down, 3.9's went and foot went further to the floor, now averages 19.6l/100km around town (stock car mind you)
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 08:48 PM   #17
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by mcfly94 View Post
i will own up to fuel economy going down, 3.9's went and foot went further to the floor, now averages 19.6l/100km around town (stock car mind you)
What did you get from a stock diff?
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 08:58 PM   #18
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by Blue Shadow View Post
What did you get from a stock diff?
Was averaging around 14.7ish
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 08:59 PM   #19
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Big jump
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 09:05 PM   #20
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by Blue Shadow View Post
Big jump
yeah i do a lot of short drives, and definitely drive it harder since having them in there.
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 09:10 PM   #21
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

I do mostly long drives, its not a daily but I go up to Hervey Bay & Bundy most weekends, so it might be worth a crack for me with 3.9 or 4.1. Just gotta find them, how much new would it cost?
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 09:25 PM   #22
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

my gears were about $600 new iirc and then $500 fitted with new bearings
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 09:27 PM   #23
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Thats not to bad if you get some extra torque out of it
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 09:32 PM   #24
mcfly94
FF.Com.Au Hardcore
 
mcfly94's Avatar
 
Join Date: Apr 2012
Location: Adelaide
Posts: 2,803
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by Blue Shadow View Post
Thats not to bad if you get some extra torque out of it
definitely, need one of those 'frequently side ways stickers', gears and removing the torque reduction strategies and adding some timing down low made a huge difference!
__________________
Current Car: 2002 AUII LTD
408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS
Daily: 1998 Mitsubishi Super VR-4 Legnum
mcfly94 is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 13-06-2016, 09:33 PM   #25
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Just get it tunes or a J3 chip?
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Old 13-06-2016, 10:07 PM   #26
BOTTLEDUP
FF.Com.Au Hardcore
 
Join Date: Dec 2004
Location: Perth NoR
Posts: 5,969
Default Re: AUII XR8 200kw - Torque Increase

Add cubic inches or a PD blower...
BOTTLEDUP is offline   Reply With Quote Multi-Quote with this Post
3 users like this post:
Old 14-06-2016, 06:04 AM   #27
Sox
RIP...
 
Sox's Avatar
 
Join Date: Dec 2004
Posts: 15,524
Community Builder: In recognition of those who have helped build the AFF community. - Issue reason: As recommended by Ropcher. Personifies the spirit of AFF. 
Default Re: AUII XR8 200kw - Torque Increase

Being auto, the gearing is up the poo.
3.9 or 4.1 gears will help a lot.

The standard headers are garbage, throw on some tri-Y's with 1.5" primaries, Advance or Hurricane.
The single 2.5" system will go ok as you're not chasing top end power.

Then a tune with ignition timing advanced and torque reduction removed and you'll be doing skids all over the joint.
__________________
.
Oval Everywhere...
Sox is offline   Reply With Quote Multi-Quote with this Post
2 users like this post:
Old 14-06-2016, 06:18 AM   #28
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by Sox View Post
Being auto, the gearing is up the poo.
3.9 or 4.1 gears will help a lot.

The standard headers are garbage, throw on some tri-Y's with 1.5" primaries, Advance or Hurricane.
The single 2.5" system will go ok as you're not chasing top end power.

Then a tune with ignition timing advanced and torque reduction removed and you'll be doing skids all over the joint.
Yeah, I ordered the exhaust, Advance headers, with a single and high flow cats
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 25-06-2016, 10:03 AM   #29
OzriderXR8
Regular Member
 
OzriderXR8's Avatar
 
Join Date: Dec 2015
Location: West of Melbourne
Posts: 488
Default Re: AUII XR8 200kw - Torque Increase

What revs are you guys showing at 100kph?

Mine sits on 2000rpm.
__________________
Cheers Ozrider

AUII XR8 200KW
FG MK2 XR6
Mini 850
Rover P5 3 Litre Mk1
OzriderXR8 is offline   Reply With Quote Multi-Quote with this Post
Old 25-06-2016, 10:31 AM   #30
Blue Shadow
R.I.P. Maggie
 
Blue Shadow's Avatar
 
Join Date: May 2015
Location: Brisbane
Posts: 1,289
Default Re: AUII XR8 200kw - Torque Increase

Quote:
Originally Posted by OzriderXR8 View Post
What revs are you guys showing at 100kph?

Mine sits on 2000rpm.
1900 in a ute
__________________
AUII XR8 200Kw Ute
FG XR6T
1976 289 Mustang (Gone)
Blue Shadow is offline   Reply With Quote Multi-Quote with this Post
Reply

Thread Tools
Display Modes

Forum Jump


All times are GMT +11. The time now is 09:30 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Other than what is legally copyrighted by the respective owners, this site is copyright www.fordforums.com.au
Positive SSL