Vintage tach to diesel - Defender Source
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  #1  
Old October 28th, 2011, 04:22 PM
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Vintage tach to diesel

Oodles of Smiths tachs out there, I have found several vintage ones that look usable. Anybody adapt one to alternator pick up?
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  #2  
Old October 28th, 2011, 09:52 PM
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I don't think there was a "stock" series tacho. I also think that there are Smiths tachs that work with alternators. I should stop thinking so much. But, I drive more by the EGT gauge.
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  #3  
Old October 29th, 2011, 01:47 PM
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Contacted both CAI, who make Smiths gauges, and the Gaugeguys to see if they can help. Between the two I should be able to get a tach and an EGT meter that match the "classic" Smiths instruments (keeping fingers crossed). Both claim they'll make anything you want. Gaugeguys sell the oil and water, and clock, volt and ammeter that match, brand new.
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

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  #4  
Old October 30th, 2011, 11:48 AM
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These guys have tachometers that they have been using on their Series restorations. When I've dealt with Charles in the past, he has been hot and cold. Sometimes he's willing to sell items and sometimes he'd rather keep them for customers who are having him restore their Series Rovers. He is very proud of what he has and asks a premium for it. It might be worth a try- and he might be able to tell you if this would work for your application (diesel engine- alternator hookup, etc). I can't, for some reason, cut and paste the link directly to the page- but there is a link for "instrument panel" (scroll down) under "parts" that shows the tach they've been using. It's hard to see the detail enough to make out the name of the gauge but I think it's a Smiths unit.

http://www.land-roverco.com/
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  #5  
Old October 30th, 2011, 05:44 PM
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Those are the standard Smiths gauges that are available new from the Gaugeguys site. I am trying to get them to make me a 0-4000 rpm diesel tach. The one pictured is the 7000 rpm unit.
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #6  
Old October 31st, 2011, 12:06 PM
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Oh-Kaaaayyy, striking out on the Smiths option. Nobody wants to touch it. Looks like I have two optios. Alternator pick up or magnetic sensor. The magnetic sensor would have to be fit to the bellhousing so it can count the flywheel teeth. These are more easily calibrated cz you just set the dial on the back of the tach to match the tooth count on the flywheel.
Alternator Pickup type. These are a bit more tricky because they are calibrated by setting dip switches or some other thing that allows for varialtion in pulley ratios. There's a formula you follow and then set the switches by the resulting number. This is far easier to install since it's just wires.
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #7  
Old October 31st, 2011, 01:09 PM
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http://www.dakotadigital.com/index.c...128/prd128.htm

This will run a Smiths universal tach off of an alt with a high-freq connection or other inductive lead. It is pretty much infinitely adjustable. An ABS sensor mounted in the bellhousing or on the crank pulley with a notch will run it too.
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  #8  
Old October 31st, 2011, 01:51 PM
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Why not use one out of a NAS D90?
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  #9  
Old October 31st, 2011, 03:21 PM
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There are NAS 90 Diesels? Do tell....

------ Follow up post added October 31st, 2011 03:27 PM ------

New option....make a substitute dial face for a Faria diesel tach that mimics the Jaeger face. I can probably use an old Series speedo and take it apart. Put a Faria diesel tach guts behind the speedo face, put the Jaeger needle on the Faria spindle, and repaint the numbers. With a new bezel kit from Gaugeguys, it should look pretty close to a real Jaeger diesel tachometer, and it'll fit in the jaeger housing and the light will work and look factory-ish.
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #10  
Old October 31st, 2011, 03:44 PM
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There are not NAS diesels, but it gets the signal from the alternator so I don't see why it would matter as there is no redline on the gauge or anything like that. As long as the pulley ratio is the same, it should work with a diesel.
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  #11  
Old October 31st, 2011, 04:36 PM
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Range is too wide. Yes it would work but needle wouldn't move very much
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #12  
Old October 31st, 2011, 05:23 PM
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It is a 6k tach and the 300tdi redlines at what, 4500?
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  #13  
Old October 31st, 2011, 06:14 PM
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Tom Rowe
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This company, http://www.tinytach.com/tinytach/diesel.php sells a tach that gets it's signal from a transducer clamped to an injector line. You can buy the transducers for $35. It might be able to (be modified) to send a signal to to a Smiths petrol tach that gets it's signal from a coil 12v signal.
Just a thought.
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  #14  
Old October 31st, 2011, 08:21 PM
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North Hollywood Speedometer makes custom gauges and, according to their website, they have the Smiths patterns. I had a Porsche 930 turbo and I had them make a reproduction boost gauge with telltale like the vintage 934 race cars had. They were very helpful over the phone. Give them a call- they treated me well and did a great job for me. My guess is they might be able to build what you're looking for or offer some advice in the very least.

http://www.nhspeedometer.com/
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  #15  
Old October 31st, 2011, 08:38 PM
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Thanks Jay will try them
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Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #16  
Old November 16th, 2011, 06:57 PM
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Series II Diesel Tach

I just noticed this post. If you have any luck identifying a decent Series II diesel tach, please let me know. I'd be interested in buying one too.

Thanks,
Mark
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  #17  
Old November 16th, 2011, 08:30 PM
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Nothing yet. I am probably going to have to make something from scratch using a marine diesel tach.
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Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #18  
Old November 16th, 2011, 09:32 PM
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Why not just get a VDO? They all work with alternators and you can adjust them to be exactly correct.
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  #19  
Old November 16th, 2011, 11:01 PM
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Wrong font on gauge face. Must match Jaegers.
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Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
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  #20  
Old November 16th, 2011, 11:37 PM
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Lots of styles: http://www.egauges.com/VD2_main.asp
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