The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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PostPosted: Wed May 15, 2024 1:30 pm 
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Hi Folks, any of you good got an early 1850 rev counter they would part with? It does not have to be working, just the same as in the photo.
Many thanks,

Tony.
Image

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 Post subject: Hi…..
PostPosted: Fri May 17, 2024 8:33 pm 
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Tony, what are you looking to do?
Are you needing to borrow a rev counter until your own is repaired?

Thanks
Ian

PS are you aware that Robsport have brand new ones?

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PostPosted: Sun May 19, 2024 6:12 pm 
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Hi Ian,
I have swapped over to 12 volt and no ballast. A friend who is good at electronics has the later rev counter so he is going to transfer the parts from one to the other so it will look the same and should i want to revert back i will still have a good one. I hope that makes sense :lol: That is why i wasn't bothered if it didn't work, i just had to look right.
I didn't know about Robsport doing them so that is handy to know.
My pal (another club member) says it will work as he has done one already. I will let you know how i get on.

Thanks again Ian,
Cheers,
Tony.

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PostPosted: Sun May 19, 2024 7:43 pm 
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There the same as MK1 Stags try Tony White

Dave


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 Post subject: Aha…
PostPosted: Sun May 19, 2024 8:07 pm 
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Quote:
Hi Ian,
I have swapped over to 12 volt and no ballast. A friend who is good at electronics has the later rev counter so he is going to transfer the parts from one to the other so it will look the same and should i want to revert back i will still have a good one. I hope that makes sense :lol: That is why i wasn't bothered if it didn't work, i just had to look right.
I didn't know about Robsport doing them so that is handy to know.
My pal (another club member) says it will work as he has done one already. I will let you know how i get on.

Thanks again Ian,
Cheers,
Tony.
From experience I know an unmodified early rev counter works on 12V unballasted, Tony.
To an early 2850 I fitted a 123 distributor and actually had two wires going to the +ve coil terminal,
one directly and the other through (so to speak) the rev counter. Disconnecting the rev counter
made no difference to the running of the engine.
For EFI conversations the early type rev counter is a better option as well…..


Thanks
Ian

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PostPosted: Sun May 19, 2024 9:35 pm 
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There the same as MK1 Stags try Tony White

Dave
Only visually, the Stag one will be calibrated for an 8 cylinder engine...and I expect the Stag engine red line is lower?


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PostPosted: Mon May 20, 2024 8:50 am 
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Quote:
Quote:
There the same as MK1 Stags try Tony White

Dave
Only visually, the Stag one will be calibrated for an 8 cylinder engine...and I expect the Stag engine red line is lower?
I may still have the one out of mine.
As I gone with something else.
Any use to you.

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1980 Dolomite Sprint with a touch of BLTS
Balanced Lightened and Tweaked 13B Rotary and SuperCharged.
Back in my possession 22 September 2019.
Rebuilding the Sprint time taken so far, 111Hrs@15/12/2020
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PostPosted: Mon May 20, 2024 10:08 am 
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Location: NANTWICH.
Thanks for the replies everyone, i'm assured by my electrickery pal what he is doing will work. So at the moment i think i am sorted. I will off course let you know either way :thumbsup:

Tony.

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 Post subject: Re: Aha…
PostPosted: Sun May 26, 2024 9:41 am 
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TDC Cheshire Area Organiser

Joined: Wed May 17, 2017 6:28 pm
Posts: 1410
Location: NANTWICH.
Quote:
Quote:
Hi Ian,
I have swapped over to 12 volt and no ballast. A friend who is good at electronics has the later rev counter so he is going to transfer the parts from one to the other so it will look the same and should i want to revert back i will still have a good one. I hope that makes sense :lol: That is why i wasn't bothered if it didn't work, i just had to look right.
I didn't know about Robsport doing them so that is handy to know.
My pal (another club member) says it will work as he has done one already. I will let you know how i get on.

Thanks again Ian,
Cheers,
Tony.
From experience I know an unmodified early rev counter works on 12V unballasted, Tony.
To an early 2850 I fitted a 123 distributor and actually had two wires going to the +ve coil terminal,
one directly and the other through (so to speak) the rev counter. Disconnecting the rev counter
made no difference to the running of the engine.
For EFI conversations the early type rev counter is a better option as well…..


Thanks
Ian
Hi Ian, my pal has swapped the insides of a later rev counter to the early one and the car now runs 12 volt no ballast. 8) We just could not get it to work without the ballast for some reason. But all is well now. Thanks for your help everyone.

Tony.

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