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Speedlimiters are GOOD! 

 

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Posted: Mon Nov 19, 2007 11:44 am 
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i'd be concerned if the tailshaft snapped on a front wheel drive

 

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Posted: Mon Nov 19, 2007 1:36 pm 
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being sarcastic?????
fwd dont have tail shafts.

 

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Posted: Mon Nov 19, 2007 2:13 pm 
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lol. thats my point! :lol:

 

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Posted: Wed Nov 21, 2007 1:19 pm 
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so say a toyota celica 4wd or wrx 4wd, can easily snap a shaft just as easy as a ford could reaching speeds over 180?

 

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Posted: Wed Nov 21, 2007 5:55 pm 
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No it's a Ford thing. Big (long) car, long one piece tail shaft.

High speed + high vibrations (poorly balanced shaft, road imperfections) = destruction.

With BA/BF they've gone to two piece shafts, and WRX's et. al. are smaller, have a diff in the middle, so two much shorter shafts.

 

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Posted: Wed Nov 21, 2007 6:13 pm 
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data_mine wrote:
No it's a Ford thing. Big (long) car, long one piece tail shaft.

High speed + high vibrations (poorly balanced shaft, road imperfections) = destruction.

With BA/BF they've gone to two piece shafts, and WRX's et. al. are smaller, have a diff in the middle, so two much shorter shafts.


Some of the E series pursuit cars had a 2 piece driveshafts. From front to rear: Slip yoke, UJ, CVJ then double cardin joint on rear. Also alot of poeple lower their falcons too much resulting in the driveshaft hitting the floor which will cause damage to the driveshaft tubing/balance weight welds and possibly resulting in failure.
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Posted: Wed Nov 21, 2007 6:14 pm 
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how much is a two piece tailshaft and what are the advantages over the one piece apart from being able have higher speeds?

Is it smoother as higher speeds?

 

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Posted: Mon Jul 28, 2008 9:53 pm 
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data_mine wrote:
rev limiter was successful, it runs (ran?) beautifully at 6250 kept making power too.

Now no one else needs to do this, it's been done.


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Posted: Mon Jul 28, 2008 10:31 pm 
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It must be an alloy t/s thing. In my "stupid" ill say it again "stupid" younger days i had my EB over 200 too many times too mention and never had one go, hell my mates stock gli would do 200 no worries again no failure.
Before i had my EB my XE's did over 200 no worries.

Note: all had steel tail shafts.

I still have the same tailshaft in the EB now 8 years later.

I remember years ago all the commo guys where going from two piece to 1 piece steel shafts as they where blowing the centre c/v joints in the big h/p cars.

Its got to be the alloy shafts, they cant handle the rpm. Or maybe the uni joint at the front of the alloy t/s are weaker hence allowing the t/s to move out of the "round" which ends up in the failure about a foot down from the uni and the destruction of the rear of the gearbox.

 

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Posted: Mon Jul 28, 2008 10:50 pm 
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Mine failed dead centre of the shaft.

I figure one of two things happened.

- Harmonics killed it. But the dyno operator says he's had shafts go before, and he always felt it (the vibrations) beforehand - he said there was no such warning with mine.
- Gear box seized near instantly, and the rotational force of the wheels/rollers applied excess torque on the shaft, essentially twisting it in half.

Both would of course result with a break in the exact middle.

 

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Posted: Tue Jul 29, 2008 12:05 am 
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Out of interest, where is your EEC modding thread? Interested to see what you can do to the thing. :)

But after seeing those pics, I see that speed limiters really are good! :lol:

 

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Posted: Tue Jul 29, 2008 12:09 am 
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Hmm interesting Data_mine, definitely a plausible theory if it snapped half way. Is it possible that an alloy shaft being submitted to clutch dumps and other abuse and alloy being brittle and not as flexible as steel is causing stress fractures and once spinning at such a high rpm is causing them to fail?

 

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Posted: Tue Sep 30, 2008 12:18 am 
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s**t ay,never heard of that happening before,anyone know what speed the limiter is set at cos my EF Mont hits the 210 no probs,been known to be a blur on the road at 2-3 in the mornin between perth and kalgoorlie,lol maybe one day it wont be a blur but a hell of a mess with a pair eyeballs rolling down the middle of the road

 

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Posted: Tue Sep 30, 2008 12:28 am 
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If you're on gas the limiter doesn't work (the limiter cuts the injectors, none of those on gas).

But it should be 180km/h.

 

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Posted: Tue Sep 30, 2008 12:43 am 
Oompa Loompa
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na mate no gas,but hell now that ive read that the blurs gunna change into an EF Mont you can count the bug splats on as it goes past

 

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