Posted: Fri Jan 18, 2008 11:24 pm
You are right.3771489 wrote:
Btw 0,854 is from 520/4 or 520A/4
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Speedometer correction factors
Page 3 of 4
Posted: Sun Nov 30, 2008 6:36 am
ok, this came out of a 4 cylinder american 320i with auto tranny.
no number on the face
sticker on the back
came out of the white one
no number on the face
sticker on the back
came out of the white one
Speedo correction factor
Posted: Thu Sep 17, 2009 10:32 pm
Hope you don't mind me replying to this old post, but as you appear to be the resident expert on these matters...
I have 2 problems with my speedo:
Chronic: speedo wavers from rest up to speed then settles.
Acute: the mileometer and trip meter stopped turning today.
My mechanic has advised replacing the speedo as he is unable to fix the gears and a friend told me that replacing the cable would stop the juddering needle problem.
Going with this advice to replace both, I just want to make sure I get the right parts !
I have a 1982 UK 323i automatic. I have standard 5.5x13 wheels shod with 205/60 R13 86H tyres all round. Taking into account the non-standard tyres, is there a more appropriate speedo to get than the one I currently have ? ( W = 1.220 EG )
Kind regards, H
I have 2 problems with my speedo:
Chronic: speedo wavers from rest up to speed then settles.
Acute: the mileometer and trip meter stopped turning today.
My mechanic has advised replacing the speedo as he is unable to fix the gears and a friend told me that replacing the cable would stop the juddering needle problem.
Going with this advice to replace both, I just want to make sure I get the right parts !
I have a 1982 UK 323i automatic. I have standard 5.5x13 wheels shod with 205/60 R13 86H tyres all round. Taking into account the non-standard tyres, is there a more appropriate speedo to get than the one I currently have ? ( W = 1.220 EG )
Kind regards, H
Posted: Mon Mar 22, 2010 11:55 pm
Mine is a 323i, build 3/1981. Has a 5 speed sport and limited slip diff.
W 0,762
According to my GPS, 1 KM off.
Tyres 195-55-15
W 0,762
According to my GPS, 1 KM off.
Tyres 195-55-15
Posted: Tue Mar 23, 2010 9:29 am
Mine is a 323i with an Eco-fivespeed gearbox and a standard 3.45 diff
W = 0762
According to the tomtom it is right-on. The original tyresetting so 185/70 13.
W = 0762
According to the tomtom it is right-on. The original tyresetting so 185/70 13.
Posted: Tue Mar 23, 2010 10:15 am
My Alpina B6-2.8 built 10-1980.
Sticker on the back says W762. Limited slip diff.
Sticker on the back says W762. Limited slip diff.
Re: Speedometer correction factors
Posted: Mon Sep 16, 2013 8:19 pm
1.393
1980 316 4 speed uk mph
it screams on motorway!!! really too high revving
1980 316 4 speed uk mph
it screams on motorway!!! really too high revving
Re: Speedometer correction factors
Posted: Mon Sep 16, 2013 8:28 pm
Fits the list posted previously I guess:
1,465 0-120 315,316,318,318A 4,10 or 4,11
1,393 0-120 320(A)/4,316(A)1.8,318i(A),320(A)1.8i 3,91
1,300 0-140 320i(2.0iA(US)),320(A)/6 3,64
1,220 0-140 323i 3,45
1,360 0-140 320i(1.8i)US 3,91
1,266 0-140 320iA(1.8i(US)) 3,64
1,465 0-120 315,316,318,318A 4,10 or 4,11
1,393 0-120 320(A)/4,316(A)1.8,318i(A),320(A)1.8i 3,91
1,300 0-140 320i(2.0iA(US)),320(A)/6 3,64
1,220 0-140 323i 3,45
1,360 0-140 320i(1.8i)US 3,91
1,266 0-140 320iA(1.8i(US)) 3,64
Re: Speedometer correction factors
Posted: Mon Sep 23, 2013 4:46 pm
mcjjordan wrote:1.393
1980 316 4 speed uk mph
it screams on motorway!!! really too high revving
70mph its revving at 4000rpm!
Re: Speedometer correction factors
Posted: Mon Sep 23, 2013 5:00 pm
found a lovely calculator for working out variants
http://johnmaherracing.com/calculators/ ... alculator/
http://johnmaherracing.com/calculators/ ... alculator/
Re: Speedometer correction factors
Posted: Sat Apr 25, 2015 5:23 pm
So i have 2 speedos
1393 & 1300
So what diff ratios are these for?
1393 & 1300
So what diff ratios are these for?
Re: Speedometer correction factors
Posted: Sat Apr 25, 2015 11:22 pm
See page 2
Re: Speedometer correction factors
Posted: Fri Feb 17, 2017 3:32 pm
My car original speedo is the one without anything written on it. (Pre facelift 316 1.6 with 4 speed manual and 4.10 open diff)
With the engine (and diff and gearbox) swap the new set up is: W=0762eg speedo, with 3.64 diff and sport 5 speed gearbox (5th gear is 1:1)
So I guess that my current speedo is probably from a 323i, thus, made ideally to match a 3.45 diff?
How should these correction factors be interpreted exactly? I haven't understood
With the engine (and diff and gearbox) swap the new set up is: W=0762eg speedo, with 3.64 diff and sport 5 speed gearbox (5th gear is 1:1)
So I guess that my current speedo is probably from a 323i, thus, made ideally to match a 3.45 diff?
How should these correction factors be interpreted exactly? I haven't understood
Re: Speedometer correction factors
Posted: Fri Feb 17, 2017 8:19 pm
Simple example: You have a speedo with w=0762, this means on 1000m Your diff turns 762 times (if it's the right 3.45). That's what Your speedo expects.
If You have a 762 speedo and a 3.64 diff, Your Diff turns faster, than the speedo expects, so Your speed is shown up higher, than is is.
0808 to 762 in this case..means 5.7% faster than real speed.
If You have a 762 speedo and a 3.64 diff, Your Diff turns faster, than the speedo expects, so Your speed is shown up higher, than is is.
0808 to 762 in this case..means 5.7% faster than real speed.
Re: Speedometer correction factors
Posted: Fri Feb 17, 2017 11:20 pm
Indeed!!
And based on a couple of comparisons I've done with gps, it seems you're right!
However, isn't all this also depending on wheels diameter?
And based on a couple of comparisons I've done with gps, it seems you're right!
However, isn't all this also depending on wheels diameter?