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MG MGB GT V8 Factory Originals Technical - v6 tach conversion help needed

Sorry to cross post, but has anyone converted their 4 cylinder tachometer to correctly (or close)read v6 pulses?
S Walters

Haven't done it but a lot of people say the standard tach can be adjusted for a V8, so a V6 shouldn't be a problem. Something about twiddling an adjustable resistor inside the can.
Paul Hunt

S. Walters, If it has the printed cicuit in it we can modify it for you to work on a 6 cylinder. It's a bit expensive though. Email me if you are interested. It was never confirmed from any sources that I contacted that you can calibrate the model with the two transistor circuit to work on a 6 cylinder engine. I would like to know myself if this can be done. Thanks , Dann
Dan Wade

Hey Walters, weren't we supposed to be going skiing today?
Anyway, here's a link to a business in Burnaby, BC that will probably help you out with the tach info you need. http://canwest-tach.com/vdo.html
I've been advised of them by a gent who put a 5 speed Toyota W58 box in his XJS and had a correction speedo drive built for a very modest sum and he's delighted with it. Jim Loosli is the guy to talk to at Canwest.
I posted this to the BBS in case anyone else is looking for speedo and tach modifications and would like another contact to try.
john morgan

S Walters, You didn't say what year MGB you have, but http://zaks.com/mgb/ has instructions and pictures for the ’77-’80 tachometer.
George Champion

i had the stock tach for my 78 changed over by the smiths instrument dealer here in town, he changed it to mate with my 3.4 60 degree v6, cost about $175. usd but it looks a lot better as stock and cheaper than changing out all the instruments, jim the company is called APT instruments in bloomington, mn
jim

Thanks for all the responses to my quest. My MG is a 1976 MGB with a Camaro 2.8 liter V6 ,T5 transmission and a Chevy Monza limited slip dif.. I have located a local guy who will do the recalibration of the tach from 4 cyl to 6 cyl for a fee. Not cheap, but I had a look inside the tach and one would surely have to know what they were about before they attempted any finger polking. Thought I might save some $$ with a quick fix but looks like I'll leave it to an practised pro. Thanks again. Steve.
Steve Walters

This thread was discussed between 07/03/2002 and 15/03/2002

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