Fordmods Logo

Speedlimiters are GOOD! 

 

Page 12 of 14 [ 199 posts ] Go to page Previous  1 ... 9, 10, 11, 12, 13, 14  Next

 
Posted: Sat Oct 04, 2008 3:19 pm 
Getting Side Ways
Offline

Age: 42

Posts: 1343

Joined: 14th Dec 2007

Gallery: 1 images

Ride: EL fairmont offroader

Location: seaspray
VIC, Australia

Other than the tailshaft design itself, tailshaft breakage would mainly be a product of tailshaft rpm, torque, shock loads, joints, and harmonics.

If say you spin it at 6000rpm at no torque, it won't be at all interested in breaking. If however you have a hot motor, the shaft could break at lower speeds than the limited speed. For example, imagine a stocko slowly climbing to 200km/h, with no shaft breakage, versus a modified car screaming to 180km/h in 9sec . . . the torque would be huge . . . plus rpm and harmonics . . . snap goes the tailshaft.

On a dyno, the speed can be kept constant but the input from the motor and resistance from the dyno can be increased or decreased, placing greater or lesser load on the tailshaft.

Also to consider, if a unijoint is at zero angle, the speeds of the shafts either side of the joint remain constant. But if the unijoint is angled and one shaft rotates at a constant speed, the other shaft will accelerate twice and deccelerate twice during every rotation. The greater the angle the greater the accelerations and decelerations. This creates a torque pulsation through the shaft, which can cause a harmonic. Double-cardan joints either reduce or eliminate the pulsations, i can't remember at the moment.

 

_________________

wrecking 9/97 EL fairmont sedan burgundy 6cyl auto 270k modBAintake

Top
 Profile  
 
 
Posted: Sat Oct 04, 2008 5:41 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

A double-cardan joint merely reduces the pulsations, it's still a byproduct of the changing shaft angles.

CV joints fixes this entirely which is why FWD, AWD, and now IRS RWDs use them.

FPV use them for all tail shaft joints too.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
 
Posted: Sat Oct 04, 2008 6:49 pm 
Getting Side Ways
Offline

Age: 42

Posts: 1343

Joined: 14th Dec 2007

Gallery: 1 images

Ride: EL fairmont offroader

Location: seaspray
VIC, Australia

When unijoints are used at both ends of the shaft and they are oriented the right way and the angles at the joints are equal and opposite, the pulsations between the inputs and outputs at the ends of the shaft are cancelled out. And whilst the shaft itself still pulsates in speed, the torque doesn't pulsate. But even if the angles are equal at static ride height, as the suspension goes up and down the angles will likely become different, and do in the case of the falcon. A lowered car might be in a worse scenario than a std height car, though the angle of the axle can be fixed.

 

_________________

wrecking 9/97 EL fairmont sedan burgundy 6cyl auto 270k modBAintake

Top
 Profile  
 
 
Posted: Mon Oct 06, 2008 11:47 am 
Oompa Loompa
Offline
User avatar

Age: 49

Posts: 28

Joined: 10th Sep 2008

Gallery: 19 images

Ride: EF FAIRMONT

Location: perth
WA, Australia

ok this all sounds interesting but the million dollar question is does anybody know if theres a shaft from an earlier falcon that will fit the EF/EL ect which would be stronger and eliminate this prob of a weak shaft

 

_________________

IF YOU WANT MORE GRUNT ROOT A PIG

Top
 Profile  
 
 
Posted: Mon Oct 06, 2008 11:49 am 
Getting Side Ways
Offline
User avatar

Age: 30

Posts: 3184

Joined: 8th Nov 2004

Gallery: 6 images

Ride: EF Falcon

Location: Townsville
QLD, Australia

e series xr tailshafts were alloy not steel and are much less prone to failure, hence the lack of speed limiters on xrs

 

_________________

Nicco's M112 Blown, T-56 equipped EF
forums/viewtopic.php?t=68319

Top
 Profile  
 
 
Posted: Mon Oct 06, 2008 11:52 am 
Oompa Loompa
Offline
User avatar

Age: 49

Posts: 28

Joined: 10th Sep 2008

Gallery: 19 images

Ride: EF FAIRMONT

Location: perth
WA, Australia

no probs looks like a xr shaft its gunna be

 

_________________

IF YOU WANT MORE GRUNT ROOT A PIG

Top
 Profile  
 
 
Posted: Mon Oct 06, 2008 4:31 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

If you're serious about doing high speeds, the a two piece custom shaft is the only way to go. It's fairly easy to get them made up.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
 
Posted: Mon Oct 06, 2008 5:38 pm 
Tyre Shredder
Offline
User avatar

Age: 29

Posts: 312

Joined: 4th Oct 2007

Gallery: 8 images

Ride: AU XR8 220 Series 2

Location: Melbourne
VIC, Australia

My car is EB1 Fairmont, it has a 1 piece shaft and im pretty sure its steel. hmmm. ive done 181km/h in mine and it was still pulling but i backed off cos i was scared about the tailshaft failing, so what speed are they most likely to break? i only been that fast once :)

Also would an alloy EF/EL tailshaft fit my EB?

Cheers guys- interesting thread

 

_________________

EB 1 Fairmont - SOLD
BA XR6 MKII - KIA
AU 2 XR8 220 - Stock - Silhouette, 5spd man.

Top
 Profile  
 
 
Posted: Fri Nov 28, 2008 1:53 am 
Oompa Loompa
Offline
User avatar

Age: 28

Posts: 27

Joined: 20th Nov 2008

Gallery: 3 images

Location: Perth
WA, Australia

definitley think 180 is fast enough on the streets!! any faster you are just asking for trouble!! 6250rpm sounds good but :D :D
Top
 Profile  
 
 
Posted: Fri Dec 05, 2008 1:46 am 
Fordmods Newbie
Offline

Posts: 8

Joined: 26th Nov 2008

Ride: EA XR6

Location: perth
WA, Australia

What models came out with speed limiters?

The reason I ask is because my ED futura has been clocked at 221kph, that was a police radar though so probably not even close to accurate. The needle was however quite a way past the 200kph max on the speedo.

The only mod the ED has ever had is the exhaust system so was there no limiter on ED's?

 

_________________

87 EA S pack
-EL tickford rims
-EL XR6 4.0
-T5 conversion

Top
 Profile  
 
 
 Post subject: Re: Speedlimiters are GOOD!
Posted: Wed Jan 28, 2009 12:57 pm 
Getting Side Ways
Offline
User avatar

Age: 35

Posts: 4285

Joined: 8th Dec 2004

Gallery: 25 images

Ride: EB2 Ghia,Mighty Boy,Eb1 Xr8 5spd

Location: ** In the Shed! **
VIC, Australia

I thought all smartlock Falcon's with the exception of the XR's & possibly the police packs were speed limited? So EB2 onwards.

Now i know why older car's had uni's @ both ends of the tail shaft. Seems like a custom 2 piece tail shaft would be a good investment for someone who races their falcon.....

I'm running a LPG Injection setup ( Easyjet ) & my speed limiter works properly on both fuels.

Cheers

ToranaGuy

 

_________________

I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|FS [VIC]: Wrecking - Eb XR8 - Parts available |Build Thread|Ebay Items - Ford Parts|

Top
 Profile  
 
 
 Post subject: Re: Speedlimiters are GOOD!
Posted: Wed Jan 28, 2009 2:50 pm 
Getting Side Ways
Offline
User avatar

Age: 28

Posts: 1110

Joined: 25th Mar 2007

Gallery: 7 images

Ride: BA MKII Fairlane GHIA

Location: Berwick
VIC, Australia

why is it that my car (2004 ba fairmont i6 petrol 4sp auto)
can go past the 220km mark doesnt seem like i have a speed limiter
Top
 Profile  
 
 
 Post subject: Re: Speedlimiters are GOOD!
Posted: Mon Aug 02, 2010 2:18 am 
Getting Side Ways
Offline

Age: 27

Posts: 506

Joined: 3rd Sep 2007

Gallery: 18 images

Ride: EF Falcon

Location: Victor Harbor
SA, Australia

Kenay wrote:
why is it that my car (2004 ba fairmont i6 petrol 4sp auto)
can go past the 220km mark doesnt seem like i have a speed limiter


IRS mate! 8-)

 

_________________

Image
Falcon Build http://www.fordmods.com/post1285079.html#p1285079

Top
 Profile  
 
 
 Post subject: Re:
Posted: Mon Aug 02, 2010 10:12 am 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

tapper21 wrote:
What models came out with speed limiters?

The reason I ask is because my ED futura has been clocked at 221kph, that was a police radar though so probably not even close to accurate. The needle was however quite a way past the 200kph max on the speedo.

The only mod the ED has ever had is the exhaust system so was there no limiter on ED's?


ED's had a limiter, set at 180kmh.....however, if you fit an EA MPFI ECU, there is no limiter.
I found the limiter on the ED when it was up on blocks......no tickets that way.... :mrgreen: ....and only takes a few seconds to find out.

 

_________________

http://youtu.be/jJTh9F3Vgg0

Top
 Profile  
 
 
 Post subject: Re:
Posted: Mon Aug 02, 2010 11:30 am 
Getting Side Ways
Offline
User avatar

Age: 35

Posts: 4285

Joined: 8th Dec 2004

Gallery: 25 images

Ride: EB2 Ghia,Mighty Boy,Eb1 Xr8 5spd

Location: ** In the Shed! **
VIC, Australia

tapper21 wrote:
What models came out with speed limiters?

The reason I ask is because my ED futura has been clocked at 221kph, that was a police radar though so probably not even close to accurate. The needle was however quite a way past the 200kph max on the speedo.

The only mod the ED has ever had is the exhaust system so was there no limiter on ED's?


Unless that ED's ecu has been tampered with (ie mod chips, EA non limited ecu fit & smartlock bypass fit), no way it was traveling that fast!

We all know police radar is not accurate. Enough tests & studies have been done to prove that.

Cheers


ToranaGuy

 

_________________

I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|FS [VIC]: Wrecking - Eb XR8 - Parts available |Build Thread|Ebay Items - Ford Parts|

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 12 of 14  [ 199 posts ]  Go to page Previous  1 ... 9, 10, 11, 12, 13, 14  Next

Who is online

Users browsing this forum: No registered users and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Tue Dec 12, 2017 4:59 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names