Hunter Speedo under reading

[CABRIOBOB]

Re: Hunter Speedo under reading

I got my gauges last year from www.etbinstruments.com who were good and not badly priced. See pics in my albums.

[greyV8pete]

Re: Hunter Speedo under reading

I believe the Marlin Electronic Speedos are made by ETB.

Does anyone know who made the original Marlin cable driven speedos like I have? Peter.

[greyV8pete]

Re: Hunter Speedo under reading

Hi Peter tried to call but no answer, speedograph ritchfield on 0115 926 4235 I have spoken to them £75 for a recalibration if it can be done it all depends once they open it up. If they can't then then you will need a cable gearbox in your cable that is £85 all prices include vat and pp
Hope this helps
Lee

Many thanks Lee and for the phone call. I will talk to thm when I get a minute. Still wondering about a digital look-alike though. Peter.

[Dane_Rescueman]

Re: Hunter Speedo under reading

I only know the Fordf Rocket box and the type 9. Each can take speedo gears from 21 teeth to 26 teeth wihout changing the worm drive on the GB output shaft (I have four different gears I have been experimenting with). They are very easy to change. Does the Rover box have interchangeable speedo gears? Maybe, if so, this could be a way to go.

[CosworthCabrioLee]

Re: Hunter Speedo under reading

Hi Peter early cabrio's used Stewart Warner but I think you have Caerbont automotive made in Swansea contact 01639 732200

[CosworthCabrioLee]

Re: Hunter Speedo under reading

Width Ratio Wheel Diameter
205 60 15
Hi Peter a quick check this should be your spped and gearing of the R380 with 3.38 Diff

5 speed MPH in Gear

1st 2nd 3rd 4th 5th
3.3 2.13 1.39 1 0.77
RPM
1000 7 10 16 22 28
1250 8 13 20 27 35
1500 10 15 23 33 42
1750 12 18 27 38 49
2000 13 20 31 43 56
2250 15 23 35 49 63
2500 16 26 39 54 71
2750 18 28 43 60 78
3000 20 31 47 65 85
3250 21 33 51 71 92
3500 23 36 55 76 99
3750 25 38 59 81 106
4000 26 41 63 87 113
4250 28 43 66 92 120
4500 30 46 70 98 127
4750 31 48 74 103 134


With 3.62 Diff
3.3 2.13 1.39 1 0.77
RPM 1 2 3 4 5
1000 6 10 15 20 26
1250 8 12 18 25 33
1500 9 14 22 30 40
1750 11 17 26 36 46
2000 12 19 29 41 53
2250 14 21 33 46 59
2500 15 24 36 51 66
2750 17 26 40 56 72
3000 18 29 44 61 79
3250 20 31 47 66 86
3500 22 33 51 71 92
3750 23 36 55 76 99
4000 25 38 58 81 105
4250 26 40 62 86 112
4500 28 43 66 91 119
4750 29 45 69 96 125

With 3.92 Diff

3.3 2.13 1.39 1 0.77
RPM 1 2 3 4 5
1000 6 9 13 19 24
1250 7 11 17 23 30
1500 9 13 20 28 36
1750 10 15 24 33 43
2000 11 18 27 37 49
2250 13 20 30 42 55
2500 14 22 34 47 61
2750 16 24 37 52 67
3000 17 26 40 56 73
3250 18 29 44 61 79
3500 20 31 47 66 85
3750 21 33 51 70 91
4000 23 35 54 75 97
4250 24 37 57 80 103
4500 26 40 61 84 109
4750 27 42 64 89 116

[greyV8pete]

Re: Hunter Speedo under reading

Hi Lee. I have 16" wheels. Toyo Proxes T1R 205x55R16 on 61/2" rims. Do you have any tables for that size? Peter.

[Mike]

Re: Hunter Speedo under reading

Hi Lee. I have 16" wheels. Toyo Proxes T1R 205x55R16 on 61/2" rims. Do you have any tables for that size? Peter.

Peter

Have a look at this site:

http://www.etyres.co.uk/tyre-size-calculator

You can compare your tyre rolling diameter at 632mm to the ones Lee has estimated as 627mm.

There is less than 1% difference, so you'll get virtually identical figures.

Mike

[greyV8pete]

Re: Hunter Speedo under reading

Thanks Mike. I will remove the back cover from the original Quaife diff to check I/D marks on C/Wheel to verify actual ratio when I get a minute. Peter.