MGA Forum

Interesting thread on the B forum on electronic GPS Speedometer for B's.
Has anyone installed one in their A?
Thanks

The GPS speedometer doesn't care what car it is installed in as long at the positive and negative wires are connected correctly. It is totally independent of any input from the vehicle.
Cheers,

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Dave DuBois
1953 MGTD
1966 MGB
http://homepages.donobi.net/sufuelpumps/

Thanks, was wondering though if the size gauge for the A is the 4 inch one, as I have nothing here to measure.

I have one in my A. Pretty nice toy, as it does more than just measure speed.
Has seven or eight other functions

I have one it works perfect and aside from the orange needle it looks not to bad. It only takes 20 seconds before the GPS has done its work. after that its very accurate!
Joost

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1959 MGA, with 1971 MGB engine (95 PK) http://s1265.photobucket.com/user/haagcaab/slideshow/1959%20MGA
2008 Saab 9-3 convertible (250 PK)
1964 Peugeot 404 Berline
2002 Volvo V70 (235 PK)

Yup - have one in the MGA dash in the Jamaican. Nice piece of kit!

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Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (375 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

I recently installed one in my "A", along with the tach, fuel gauge, temp gauge, oil pressure gauge, and a volt meter. Two of the gauges are currently mounted in the radio cutout until I finish my custom walnut burl dash with two extra holes where the speaker grill would normally be.

The speedo and tach are 4". The smaller gauges are 2 1/8". All of them will fit easily in the holes in the stock metal dash. I posted a thread here recently with pictures, showing how to modify the stock thread adapter on the front of the head, so you can screw the temp sending unit directly in. The oil pressure gauge simply requires a female 1/4" NPT coupling next to the starter switch. I'll be posting a much more detailed article on the whole project in the near future. The fuel gauge is not very accurate. I programmed it with a full tank, and it still said 1/4 full when the pump started sucking air. Other than that, I'm very pleased with the other gauges... could just be a flakey sending unit on the tank.

Although it's possible to get the dials to light up in a positive ground car by reversing the connections, there is also a 3-conductor cable that is bussed to each gauge. The only safe way to get everything to work properly and not burn out a gauge, is to change the car to negative ground. It's easy to do. You may or may not have to change to a negative ground fuel pump, depending on what's in there now. Other than that, just reverse the battery cables and stick a couple of "Negative Earth" stickers in prominent locations.

I've checked the speedo with radar activated speed signs, and it's right on the money. The tach just needs a connection to the negative side of your ignition coil, and the same 3-conductor power and 2-conductor dash light cables that all the gauges use.

Does anyone have a gauge picture?

This is the one you will be needing:
Speedhut gauge

Ive installed it and it works great!
Joost

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1959 MGA, with 1971 MGB engine (95 PK) http://s1265.photobucket.com/user/haagcaab/slideshow/1959%20MGA
2008 Saab 9-3 convertible (250 PK)
1964 Peugeot 404 Berline
2002 Volvo V70 (235 PK)

Joost, can you send me a picture, I want to match the original tach?

Thanks!!

A mechanic friend of mine claims that mechanical oil pressure gauges are better. Any concerns or issues here with the Speedhut electronic pressure gauge?

Tim, I'll try to get some pictures of mine for you, but I'm buried in work right now. I may not be able to get to that until the weekend. To answer your PM, I just uploaded an MG octagon logo for the two larger gauges, and had them put that halfway between the top of the gauge, and where the needle pivots. It's sized at around 3/8" across. I haven't finished the custom dash yet, so I have two gauges sitting in the radio slot for now.

I have no reason to think there's anything wrong with the way the oil pressure gauge functions. All Speedhut gauges will remain pointing at whatever position they were in when you shut the engine off, but seem to function perfectly fine when the car's running. I thought my car was running too hot with the stock temperature gauge, but my new Speedhut gauge says it isn't. I trust it a lot more than the old one after 55 years of service, and further inspection of the engine after running, confirms that it's running between 160-190 degrees most of the time, depending on conditions. I'll also add that I've checked the GPS speedo against radar speed signs, and it's right on the money every time.

Jim, don't kill yourself!
I am trying to get shots only of the tach and speedometer, would like to duplicate the vintage look.
Thanks

This one is in km and not in miles because I'm gonna bring it back to Europe next year.
Very easy to install. Only want to paint the arrow white...
I think the numbers match very well..

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1959 MGA, with 1971 MGB engine (95 PK) http://s1265.photobucket.com/user/haagcaab/slideshow/1959%20MGA
2008 Saab 9-3 convertible (250 PK)
1964 Peugeot 404 Berline
2002 Volvo V70 (235 PK)



Edited 1 time(s). Last edit at 2014-10-27 12:37 PM by haagcaab.