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Home > Help Needed / General Tech Chat > Smiths tacho with megajolt

JT

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2742 Posts
Member #: 637
Post Whore

Hertfordshire

Hi

I have this tacho. ...

http://www.minispares.com/product/Classic/...k%20to%20search

Just wondering how people have wired them up with megajolt?
Mine seems to work at idle and lower/calmer revs, but as soon as I drive a bit more spirited it goes all over the place!
At the moment I have it wired to the megajolt tacho out put.

Any thoughts?

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985


viz139

108 Posts
Member #: 9182
Advanced Member

You may find you also need this
http://trigger-wheels.com/store/contents/en-uk/p129.html


scoop-face

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46 Posts
Member #: 11122
Member

Scottish Borders.

Do you have a good earth? My tacho used to blink a lot, turned out to be an earth problem.


JT

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2742 Posts
Member #: 637
Post Whore

Hertfordshire

I'll check out the earth. Think it's the same as the other gauges and engine earth though :/

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985


longy

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1547 Posts
Member #: 2727
Post Whore

Bicester

Check out the autosportlabs MJLJ V4 manual. frustratingly i have the RVI tacho, your RVC should work fine.

https://wiki.autosportlabs.com/MJLJ_V4_vehi...tallation_guide

About 2/3 down the page

1972 998 TURBO SLEEPER


JT

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2742 Posts
Member #: 637
Post Whore

Hertfordshire

I've got megajolt v3

I should add the tacho has a few different ways of wiring it up.
There's a high out put and a low out put. I'll get a pic of the instructions next time I'm at the workshop.

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

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