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Fulvia final drive
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Topic: Fulvia final drive (Read 5124 times)
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RobD
Lapsed
Senior Member
Posts: 180
Fulvia final drive
«
on:
18 January, 2016, 06:12:47 PM »
Is there a way of identifying the final drive ratio in a Fulvia box? Will it be marked on the casing somewhere? All advice gratefully received.
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You're all entitled to my opinion.
'75 Fulvia 1.3S
'68 works Laverda 125cc ISDT
KTM 640 Adventure
Yamaha TDM 900
Numerous Gas Gas trail bikes...
www.adventureride.co.uk
lancialulu
Press Officer
Permanent resident
Posts: 5059
Re: Fulvia final drive
«
Reply #1 on:
18 January, 2016, 10:43:51 PM »
The only reliable way is to count the turns of the input to output shaft.....
Logged
Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21. 12v
RobD
Lapsed
Senior Member
Posts: 180
Re: Fulvia final drive
«
Reply #2 on:
19 January, 2016, 06:30:03 PM »
Thanks Tim, I suspected as such.
Logged
You're all entitled to my opinion.
'75 Fulvia 1.3S
'68 works Laverda 125cc ISDT
KTM 640 Adventure
Yamaha TDM 900
Numerous Gas Gas trail bikes...
www.adventureride.co.uk
lancialulu
Press Officer
Permanent resident
Posts: 5059
Re: Fulvia final drive
«
Reply #3 on:
19 January, 2016, 06:35:21 PM »
Tedious but true. The blue plate should have the right number on it but who knows if the box has been swopped around. The alternative is to open it up and count the teeth which is what I did on my Sport Box a few years ago as I was changing a bearing or some such.
Logged
Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21. 12v
RobD
Lapsed
Senior Member
Posts: 180
Re: Fulvia final drive
«
Reply #4 on:
20 January, 2016, 06:47:25 PM »
Hi Tim,
It was only after Ross made enquiries about the 'boxes I have for sale that I realised what an array of final drives and gear ratios Lancia produced for the Fulvia. My boxes are marked 818.630 which I assume is for a standard 1.3S although I note the Monte Carlo, which I presume has the same series model number, came with a lower diff. which must make the Monte Carlos purgatory on motorways . All this has got me thinking about building a box with a higher final final drive. As far as I can tell the 1600 Sport came equipped with the longest legs with a final drive giving 19.9mph per 1000 revs.
If all goes to plan my car will get its new engine sometime in the next few months and I might look into sourcing 10/37 or an 11/39 final drive to incorporate it into a spare box. 79 mph at 4000rpm definitely has an appeal. The ratios in a 1.3 five speed 'box with its lower 1st and 2nd gears compared to the 1600s might suit a higher final drive quite well.
Logged
You're all entitled to my opinion.
'75 Fulvia 1.3S
'68 works Laverda 125cc ISDT
KTM 640 Adventure
Yamaha TDM 900
Numerous Gas Gas trail bikes...
www.adventureride.co.uk
lancialulu
Press Officer
Permanent resident
Posts: 5059
Re: Fulvia final drive
«
Reply #5 on:
20 January, 2016, 08:45:48 PM »
Hf2000 final drive but getting hard to find.
Logged
Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21. 12v
ColinMarr
Permanent resident
Posts: 1660
Re: Fulvia final drive
«
Reply #6 on:
21 January, 2016, 08:34:38 AM »
This is another excuse for a photo! Yes, HF2000 final drive in a Fulvia works well.
Colin
IMG_1386a.jpg
(189.81 KB, 1181x886 - viewed 357 times.)
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RobD
Lapsed
Senior Member
Posts: 180
Re: Fulvia final drive
«
Reply #7 on:
26 January, 2016, 09:53:52 AM »
That's what I'm talking about! Great picture Colin, sums it up perfectly.
Logged
You're all entitled to my opinion.
'75 Fulvia 1.3S
'68 works Laverda 125cc ISDT
KTM 640 Adventure
Yamaha TDM 900
Numerous Gas Gas trail bikes...
www.adventureride.co.uk
angelorange
Megaposter
Posts: 324
Re: Fulvia final drive
«
Reply #8 on:
26 January, 2016, 07:43:27 PM »
Counting teeth easier once gbox is apart of course!
http://www.alma.it/vanzettip/fulvia/fulviae.html
Logged
I'm entitled to my ignorance!
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