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The Pub For General Automotive Related Talk |
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#31 | ||
VFII SS UTE
Join Date: Apr 2007
Location: Central Coast
Posts: 6,353
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only on a single lane road, different story on a duel lane road..
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I don't often hear the sound of a screaming LSX. But when I do, So do the neighbours.. GO SOUTHS
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#32 | ||
FF.Com.Au Hardcore
Join Date: Jun 2017
Posts: 1,341
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Its a shame the Police aren't a little more aware of this fact. It would save a lot of time & money wasted at court.
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#33 | ||
Oo\===/oO
Join Date: Jan 2007
Location: Tamworth
Posts: 11,348
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Not sure I understand...of the police radar gets you doing 10km/h over, thats got nothing to do with the speedo reading higher then actual speed...
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#34 | ||
FF.Com.Au Hardcore
Join Date: Feb 2011
Location: by the beach
Posts: 1,982
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No because most of them drive in the fast lane
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clevo mafia (sadly sold) 351c xe manual (now with short shifting 5sp goodness) xc gs coupe project...hmm more clevo for me new daily 2005 ba sr |
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#35 | ||
VFII SS UTE
Join Date: Apr 2007
Location: Central Coast
Posts: 6,353
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exactly, the speedo don't work in the right lane..
drive faster..
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I don't often hear the sound of a screaming LSX. But when I do, So do the neighbours.. GO SOUTHS
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#37 | |||
FF.Com.Au Hardcore
Join Date: Jan 2018
Posts: 990
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Quote:
If the Torana is running 13in wheels and 3.08 diff maybe it's to do with the selection of the speedo gear that in the gearbox, mine was a green one I believe. Maybe they were putting in a 2.78 ratio speedo gear with 13in wheels with 3.08 diff, a white speedo gear I think 2.78 was. Sure some speedos may of been wonky ones but I can not see why they would of been as the speedo would be just the same setup Torana or the big Holden, behind the face that you see. All the LH-X Torana's my mates had speedos were fine at reading and they were driving flat out on the highway a lot of the time. If you work out the % difference between 3.55, 3.36 3.08, 2.78, 2.60 and then look at the wheel and tyres differences 13in to 14in, well I am sure Holden just tossed in what ever will do, as such was no real big deal back in the days. you had a red and a pink and a green a blue a white speedo gears that i can remember that I have seen for the Aussie box. |
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#38 | ||
FF.Com.Au Hardcore
Join Date: Oct 2008
Location: Victoria
Posts: 7,854
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No wonder I'm always being held up by Subaru's
MY SZII is bang on, but only after being fitted with slightly larger OD tyres
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______________________________ 2015 Territory Titanium RWD Diesel - SOLD 2016 BMW X5 xdrive 30D Msport Seadoo Challenger 210SE 310HP |
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#39 | ||
Cabover nut
Join Date: Aug 2015
Location: Onsite Eastcoast
Posts: 10,827
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Back in the day my old HX Sandman was out by 10km/h, a HJ 10km/h out.
At present I have a 92 T3500 Mazda truck which over reads 10km/h as well but is matched by the fuel gauge that under reads by a quarter tank. At least I never run out of fuel.
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heritagestonemason.com/Fordlouisvillerestoration In order that the labour of centuries past may not be in vain during the centuries to come...... D. Diderot 1752
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#40 | |||
FF.Com.Au Hardcore
Join Date: Jan 2018
Posts: 990
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Quote:
The Torana with 13in wheels and 2.78 diff is much the same gearing as it is with a 3.08 ratio and 14in wheels. I have that old wheels test mag still, i bought that mag when it came out. When i got my SL/R5000 it was around 1989 and it had 14in wheels put on it and a LSD 3.08 diff and she hit 5000rpm at 200KM/H because of valve bounce and the same was true with my Sandman with a 3.08 diff, so the speedos and tacho must of been not that bad. You could rev them stock engines out to 5500rpm but in top gear i would say that with the time span at high revs the springs start to get a shimmy by then and they lose some more tension then, so they can not hold 5500rpm for long. |
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#41 | |||
FF.Com.Au Hardcore
Join Date: Jan 2018
Posts: 990
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Quote:
Here look at this HQ Holden service book i have says in mph Tyre 6.95X14 and 3.08 diff ratio = 23mph @1000RPM D70 X14 ' '= 23.2 mph ' ' F78 X14 ' '= 24 mph ' ' 7.35X14 ' '= 23.4mph ' ' So tyres make a difference as well and all. |
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#42 | ||
*barks incessantly
Join Date: Jun 2016
Location: SA
Posts: 1,554
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Looking back, my BA's speedo was fairly accurate. It used to tell me I was going 100km/h when I was going 97-98km/h with newish tyres.
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#43 | |||
Cabover nut
Join Date: Aug 2015
Location: Onsite Eastcoast
Posts: 10,827
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Quote:
The HJ Kingswood 202 had same wheels and tyres and standard banjo diff. They were always out by about 10km/h @ 100km. Had a new WB van with the same misreading speedo.
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heritagestonemason.com/Fordlouisvillerestoration In order that the labour of centuries past may not be in vain during the centuries to come...... D. Diderot 1752
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