Good-Win Racing Mazda Performance Parts

Longacre Accutech SMI Water Temperature Gauge (100F-280F)


Miata 1990-2005 · Gauges

Part Number: 61-1581

Application: 1990-2005

Price: $99.50


Longacre Accutech SMI Water Temperature Gauge (100F-280F)
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Longacre's innovative Accutech SMi gauge is a 2-5/8" Stepper-Motor-style gauge that uses a small electronic motor that turns a fraction of a rotation to drive the pointer.

Much more precise then traditional mechanical gauges, many pro-racing teams are switching to Stepper-Motor gauges to improve accuracy. The gauges include ultra bright LED warning lights that are easily set by the user and include 2 total set-points to make sure you notice problems before they become disastrous.

The kit includes everything necessary for installation - heavily insulated wiring, soldered/heat-shrinked terminals, lights, and senders. Water Temperature gauge reads from 100 -280 F.

Watch a short video from Longacre on this gauge:

Other benefits include:

-2-5/8" gauge with molded polycarbonate/ABS case.

-Included electronic sensor drives the gauge - no oil or fuel in the driver s compartment for safety.

-Easy-to-Read thru-the-dial LED backlights and an illuminated pointer.

-Self testing - Pointers swing full scale and all LEDs light up when car is started

-Can be used with 12 and 16 Volt negative ground systems.


The Accutech line of gauges offer excellent value for track and street customers. Unlike most gauges, the sensors included with Accutech gauges are pre-wired and sealed against the weather. This is especially important for accurate readings from your sensors.


These are the gauges I use in my own track car after a long period of going through several other brands. I was really happy and relieved when I found Longacre's Accutech line of gauges; Excellent quality, very precise gauges that you can rely on at a very reasonable price.

A very clean installation example from our friend Erik Bruner of the SMI gauges in his NB. In his own words, the 2 5/8" gauges drop right into the vent hole after you remove the vent. It's as if they were made for that location:

Another example of the Accutech gauges in a customer's NB:

*** Product images may differ from actual product appearance ***


Roadstersport II was a great purchase, easy install, and sounds great.

-- Denny

I red'all the parts in the order I placed and installed them in my car yesterday. I am beyond happy. The install went without a hitch. The results were fantastic. The new brakes track straight, make no noise, and stop the car authoritatively. The new rotors look pretty cool, which we all know isn't all that important, but having 6 women offer to bear your children, because your car looks SO cool is a good problem to have. Thank for great products and service.

-- Chaz C.